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this.on(t,e)}}),ce.fn.extend({bind:function(e,t,n){return this.on(e,null,t,n)},unbind:function(e,t){return this.off(e,null,t)},delegate:function(e,t,n,r){return this.on(t,e,n,r)},undelegate:function(e,t,n){return 1===arguments.length?this.off(e,"**"):this.off(t,e||"**",n)},hover:function(e,t){return this.on("mouseenter",e).on("mouseleave",t||e)}}),ce.each("blur focus focusin focusout resize scroll click dblclick mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave change select submit keydown keypress keyup contextmenu".split(" "),function(e,n){ce.fn[n]=function(e,t){return 0<arguments.length?this.on(n,null,e,t):this.trigger(n)}});var en=/^[\s\uFEFF\xA0]+|([^\s\uFEFF\xA0])[\s\uFEFF\xA0]+$/g;ce.proxy=function(e,t){var n,r,i;if("string"==typeof t&&(n=e[t],t=e,e=n),v(e))return r=ae.call(arguments,2),(i=function(){return e.apply(t||this,r.concat(ae.call(arguments)))}).guid=e.guid=e.guid||ce.guid++,i},ce.holdReady=function(e){e?ce.readyWait++:ce.ready(!0)},ce.isArray=Array.isArray,ce.parseJSON=JSON.parse,ce.nodeName=fe,ce.isFunction=v,ce.isWindow=y,ce.camelCase=F,ce.type=x,ce.now=Date.now,ce.isNumeric=function(e){var t=ce.type(e);return("number"===t||"string"===t)&&!isNaN(e-parseFloat(e))},ce.trim=function(e){return null==e?"":(e+"").replace(en,"$1")},"function"==typeof define&&define.amd&&define("jquery",[],function(){return ce});var tn=ie.jQuery,nn=ie.$;return ce.noConflict=function(e){return ie.$===ce&&(ie.$=nn),e&&ie.jQuery===ce&&(ie.jQuery=tn),ce},"undefined"==typeof e&&(ie.jQuery=ie.$=ce),ce});
x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'(*+,;=:@/?|]+|%[\dA-F]{2})*)?(?:\#(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'(*+,;=:@/?|]+|%[\dA-F]{2})*)?";
		break;

		case 'www_url':
			// generated with regex_idn.php file in the develop folder
			return "www\.(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'()*+,;=:@|]+|%[\dA-F]{2})+(?::\d*)?(?:/(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'()*+,;=:@|]+|%[\dA-F]{2})*)*(?:\?(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'()*+,;=:@/?|]+|%[\dA-F]{2})*)?(?:\#(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'()*+,;=:@/?|]+|%[\dA-F]{2})*)?";
		break;

		case 'www_url_inline':
			// generated with regex_idn.php file in the develop folder
			return "www\.(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'(*+,;=:@|]+|%[\dA-F]{2})+(?::\d*)?(?:/(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'(*+,;=:@|]+|%[\dA-F]{2})*)*(?:\?(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'(*+,;=:@/?|]+|%[\dA-F]{2})*)?(?:\#(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'(*+,;=:@/?|]+|%[\dA-F]{2})*)?";
		break;

		case 'relative_url':
			// generated with regex_idn.php file in the develop folder
			return "(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'()*+,;=:@|]+|%[\dA-F]{2})*(?:/(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'()*+,;=:@|]+|%[\dA-F]{2})*)*(?:\?(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'()*+,;=:@/?|]+|%[\dA-F]{2})*)?(?:\#(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'()*+,;=:@/?|]+|%[\dA-F]{2})*)?";
		break;

		case 'relative_url_inline':
			// generated with regex_idn.php file in the develop folder
			return "(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'(*+,;=:@|]+|%[\dA-F]{2})*(?:/(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'(*+,;=:@|]+|%[\dA-F]{2})*)*(?:\?(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'(*+,;=:@/?|]+|%[\dA-F]{2})*)?(?:\#(?:[^\p{C}\p{Z}\p{S}\p{P}\p{Nl}\p{No}\p{Me}\x{1100}-\x{115F}\x{A960}-\x{A97C}\x{1160}-\x{11A7}\x{D7B0}-\x{D7C6}\x{20D0}-\x{20FF}\x{1D100}-\x{1D1FF}\x{1D200}-\x{1D24F}\x{0640}\x{07FA}\x{302E}\x{302F}\x{3031}-\x{3035}\x{303B}]*[\x{00B7}\x{0375}\x{05F3}\x{05F4}\x{30FB}\x{002D}\x{06FD}\x{06FE}\x{0F0B}\x{3007}\x{00DF}\x{03C2}\x{200C}\x{200D}\pL0-9\-._~!$&'(*+,;=:@/?|]+|%[\dA-F]{2})*)?";
		break;

		case 'table_prefix':
			return '#^[a-zA-Z][a-zA-Z0-9_]*$#';
		break;

		// Matches the predecing dot
		case 'path_remove_dot_trailing_slash':
			return '#^(?:(\.)?)+(?:(.+)?)+(?:([\\/\\\])$)#';
		break;

		case 'semantic_version':
			// Regular expression to match semantic versions by http://rgxdb.com/
			return '/(?<=^[Vv]|^)(?:(?<major>(?:0|[1-9](?:(?:0|[1-9])+)*))[.](?<minor>(?:0|[1-9](?:(?:0|[1-9])+)*))[.](?<patch>(?:0|[1-9](?:(?:0|[1-9])+)*))(?:-(?<prerelease>(?:(?:(?:[A-Za-z]|-)(?:(?:(?:0|[1-9])|(?:[A-Za-z]|-))+)?|(?:(?:(?:0|[1-9])|(?:[A-Za-z]|-))+)(?:[A-Za-z]|-)(?:(?:(?:0|[1-9])|(?:[A-Za-z]|-))+)?)|(?:0|[1-9](?:(?:0|[1-9])+)*))(?:[.](?:(?:(?:[A-Za-z]|-)(?:(?:(?:0|[1-9])|(?:[A-Za-z]|-))+)?|(?:(?:(?:0|[1-9])|(?:[A-Za-z]|-))+)(?:[A-Za-z]|-)(?:(?:(?:0|[1-9])|(?:[A-Za-z]|-))+)?)|(?:0|[1-9](?:(?:0|[1-9])+)*)))*))?(?:[+](?<build>(?:(?:(?:[A-Za-z]|-)(?:(?:(?:0|[1-9])|(?:[A-Za-z]|-))+)?|(?:(?:(?:0|[1-9])|(?:[A-Za-z]|-))+)(?:[A-Za-z]|-)(?:(?:(?:0|[1-9])|(?:[A-Za-z]|-))+)?)|(?:(?:0|[1-9])+))(?:[.](?:(?:(?:[A-Za-z]|-)(?:(?:(?:0|[1-9])|(?:[A-Za-z]|-))+)?|(?:(?:(?:0|[1-9])|(?:[A-Za-z]|-))+)(?:[A-Za-z]|-)(?:(?:(?:0|[1-9])|(?:[A-Za-z]|-))+)?)|(?:(?:0|[1-9])+)))*))?)$/';
		break;
	}

	return '';
}

/**
* Generate regexp for naughty words censoring
* Depends on whether installed PHP version supports unicode properties
*
* @param string	$word			word template to be replaced
*
* @return string $preg_expr		regex to use with word censor
*/
function get_censor_preg_expression($word)
{
	// Unescape the asterisk to simplify further conversions
	$word = str_replace('\*', '*', preg_quote($word, '#'));

	// Replace asterisk(s) inside the pattern, at the start and at the end of it with regexes
	$word = preg_replace(array('#(?<=[\p{Nd}\p{L}_])\*+(?=[\p{Nd}\p{L}_])#iu', '#^\*+#', '#\*+$#'), array('([\x20]*?|[\p{Nd}\p{L}_-]*?)', '[\p{Nd}\p{L}_-]*?', '[\p{Nd}\p{L}_-]*?'), $word);

	// Generate the final substitution
	$preg_expr = '#(?<![\p{Nd}\p{L}_-])(' . $word . ')(?![\p{Nd}\p{L}_-])#iu';

	return $preg_expr;
}

/**
* Returns the first block of the specified IPv6 address and as many additional
* ones as specified in the length parameter.
* If length is zero, then an empty string is returned.
* If length is greater than 3 the complete IP will be returned
*/
function short_ipv6($ip, $length)
{
	if ($length < 1)
	{
		return '';
	}

	// Handle IPv4 embedded IPv6 addresses
	if (preg_match('/(?:\d{1,3}\.){3}\d{1,3}$/i', $ip))
	{
		$binary_ip = inet_pton($ip);
		$ip_v6 = $binary_ip ? inet_ntop($binary_ip) : $ip;
		$ip = $ip_v6 ?: $ip;
	}

	// extend IPv6 addresses
	$blocks = substr_count($ip, ':') + 1;
	if ($blocks < 9)
	{
		$ip = str_replace('::', ':' . str_repeat('0000:', 9 - $blocks), $ip);
	}
	if ($ip[0] == ':')
	{
		$ip = '0000' . $ip;
	}
	if ($length < 4)
	{
		$ip = implode(':', array_slice(explode(':', $ip), 0, 1 + $length));
	}

	return $ip;
}

/**
* Normalises an internet protocol address,
* also checks whether the specified address is valid.
*
* IPv4 addresses are returned 'as is'.
*
* IPv6 addresses are normalised according to
*	A Recommendation for IPv6 Address Text Representation
*	http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-07
*
* @param string $address	IP address
*
* @return mixed		false if specified address is not valid,
*					string otherwise
*/
function phpbb_ip_normalise(string $address)
{
	$ip_normalised = false;

	if (filter_var($address, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4))
	{
		$ip_normalised = $address;
	}
	else if (filter_var($address, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6))
	{
		$ip_normalised = inet_ntop(inet_pton($address));

		// If is ipv4
		if (stripos($ip_normalised, '::ffff:') === 0)
		{
			$ip_normalised = substr($ip_normalised, 7);
		}
	}

	return $ip_normalised;
}

// Handler, header and footer

/**
* Error and message handler, call with trigger_error if read
*/
function msg_handler($errno, $msg_text, $errfile, $errline)
{
	global $cache, $db, $auth, $template, $config, $user, $request;
	global $phpbb_root_path, $msg_title, $msg_long_text, $phpbb_log;
	global $phpbb_container;

	// https://www.php.net/manual/en/language.operators.errorcontrol.php
	// error_reporting() return a different error code inside the error handler after php 8.0
	$suppresed = E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR | E_USER_ERROR | E_RECOVERABLE_ERROR | E_PARSE;
	if (PHP_VERSION_ID < 80000)
	{
		$suppresed = 0;
	}

	// Do not display notices if we suppress them via @
	if (error_reporting() == $suppresed && $errno != E_USER_ERROR && $errno != E_USER_WARNING && $errno != E_USER_NOTICE)
	{
		return;
	}

	// Message handler is stripping text. In case we need it, we are possible to define long text...
	if (isset($msg_long_text) && $msg_long_text && !$msg_text)
	{
		$msg_text = $msg_long_text;
	}

	switch ($errno)
	{
		case E_NOTICE:
		case E_WARNING:

			// Check the error reporting level and return if the error level does not match
			// If DEBUG is defined the default level is E_ALL
			if (($errno & ($phpbb_container != null && $phpbb_container->getParameter('debug.show_errors') ? E_ALL : error_reporting())) == 0)
			{
				return;
			}

			if (strpos($errfile, 'cache') === false && strpos($errfile, 'template.') === false)
			{
				$errfile = phpbb_filter_root_path($errfile);
				$msg_text = phpbb_filter_root_path($msg_text);
				$error_name = ($errno === E_WARNING) ? 'PHP Warning' : 'PHP Notice';
				echo '<b>[phpBB Debug] ' . $error_name . '</b>: in file <b>' . $errfile . '</b> on line <b>' . $errline . '</b>: <b>' . $msg_text . '</b><br />' . "\n";

				// we are writing an image - the user won't see the debug, so let's place it in the log
				if (defined('IMAGE_OUTPUT') || defined('IN_CRON'))
				{
					$phpbb_log->add('critical', $user->data['user_id'], $user->ip, 'LOG_IMAGE_GENERATION_ERROR', false, array($errfile, $errline, $msg_text));
				}
				// echo '<br /><br />BACKTRACE<br />' . get_backtrace() . '<br />' . "\n";
			}

			return;

		break;

		case E_USER_ERROR:

			if (!empty($user) && $user->is_setup())
			{
				$msg_text = (!empty($user->lang[$msg_text])) ? $user->lang[$msg_text] : $msg_text;
				$msg_title = (!isset($msg_title)) ? $user->lang['GENERAL_ERROR'] : ((!empty($user->lang[$msg_title])) ? $user->lang[$msg_title] : $msg_title);

				$l_return_index = sprintf($user->lang['RETURN_INDEX'], '<a href="' . $phpbb_root_path . '">', '</a>');
				$l_notify = '';

				if (!empty($config['board_contact']))
				{
					$l_notify = '<p>' . sprintf($user->lang['NOTIFY_ADMIN_EMAIL'], $config['board_contact']) . '</p>';
				}
			}
			else
			{
				$msg_title = 'General Error';
				$l_return_index = '<a href="' . $phpbb_root_path . '">Return to index page</a>';
				$l_notify = '';

				if (!empty($config['board_contact']))
				{
					$l_notify = '<p>Please notify the board administrator or webmaster: <a href="mailto:' . $config['board_contact'] . '">' . $config['board_contact'] . '</a></p>';
				}
			}

			$log_text = $msg_text;
			$backtrace = get_backtrace();
			if ($backtrace)
			{
				$log_text .= '<br /><br />BACKTRACE<br />' . $backtrace;
			}

			if (defined('IN_INSTALL') || ($phpbb_container != null && $phpbb_container->getParameter('debug.show_errors')) || isset($auth) && $auth->acl_get('a_'))
			{
				$msg_text = $log_text;

				// If this is defined there already was some output
				// So let's not break it
				if (defined('IN_DB_UPDATE'))
				{
					echo '<div class="errorbox">' . $msg_text . '</div>';

					$db->sql_return_on_error(true);
					phpbb_end_update($cache, $config);
				}
			}

			if ((defined('IN_CRON') || defined('IMAGE_OUTPUT')) && isset($db))
			{
				// let's avoid loops
				$db->sql_return_on_error(true);
				$phpbb_log->add('critical', $user->data['user_id'], $user->ip, 'LOG_GENERAL_ERROR', false, array($msg_title, $log_text));
				$db->sql_return_on_error(false);
			}

			// Do not send 200 OK, but service unavailable on errors
			send_status_line(503, 'Service Unavailable');

			garbage_collection();

			// Try to not call the adm page data...

			echo '<!DOCTYPE html>';
			echo '<html dir="ltr">';
			echo '<head>';
			echo '<meta charset="utf-8">';
			echo '<meta http-equiv="X-UA-Compatible" content="IE=edge">';
			echo '<title>' . $msg_title . '</title>';
			echo '<style type="text/css">' . "\n" . '/* <![CDATA[ */' . "\n";
			echo '* { margin: 0; padding: 0; } html { font-size: 100%; height: 100%; margin-bottom: 1px; background-color: #E4EDF0; } body { font-family: "Lucida Grande", Verdana, Helvetica, Arial, sans-serif; color: #536482; background: #E4EDF0; font-size: 62.5%; margin: 0; } ';
			echo 'a:link, a:active, a:visited { color: #006699; text-decoration: none; } a:hover { color: #DD6900; text-decoration: underline; } ';
			echo '#wrap { padding: 0 20px 15px 20px; min-width: 615px; } #page-header { text-align: right; height: 40px; } #page-footer { clear: both; font-size: 1em; text-align: center; } ';
			echo '.panel { margin: 4px 0; background-color: #FFFFFF; border: solid 1px  #A9B8C2; } ';
			echo '#errorpage #page-header a { font-weight: bold; line-height: 6em; } #errorpage #content { padding: 10px; } #errorpage #content h1 { line-height: 1.2em; margin-bottom: 0; color: #DF075C; } ';
			echo '#errorpage #content div { margin-top: 20px; margin-bottom: 5px; border-bottom: 1px solid #CCCCCC; padding-bottom: 5px; color: #333333; font: bold 1.2em "Lucida Grande", Arial, Helvetica, sans-serif; text-decoration: none; line-height: 120%; text-align: left; } ';
			echo "\n" . '/* ]]> */' . "\n";
			echo '</style>';
			echo '</head>';
			echo '<body id="errorpage">';
			echo '<div id="wrap">';
			echo '	<div id="page-header">';
			echo '		' . $l_return_index;
			echo '	</div>';
			echo '	<div id="acp">';
			echo '	<div class="panel">';
			echo '		<div id="content">';
			echo '			<h1>' . $msg_title . '</h1>';

			echo '			<div>' . $msg_text . '</div>';

			echo $l_notify;

			echo '		</div>';
			echo '	</div>';
			echo '	</div>';
			echo '	<div id="page-footer">';
			echo '		Powered by <a href="https://www.phpbb.com/">phpBB</a>&reg; Forum Software &copy; phpBB Limited';
			echo '	</div>';
			echo '</div>';
			echo '</body>';
			echo '</html>';

			exit_handler();

			// On a fatal error (and E_USER_ERROR *is* fatal) we never want other scripts to continue and force an exit here.
			exit;
		break;

		case E_USER_WARNING:
		case E_USER_NOTICE:

			define('IN_ERROR_HANDLER', true);

			if (empty($user->data))
			{
				$user->session_begin();
			}

			// We re-init the auth array to get correct results on login/logout
			$auth->acl($user->data);

			if (!$user->is_setup())
			{
				$user->setup();
			}

			if ($msg_text == 'ERROR_NO_ATTACHMENT' || $msg_text == 'NO_FORUM' || $msg_text == 'NO_TOPIC' || $msg_text == 'NO_USER')
			{
				send_status_line(404, 'Not Found');
			}

			$msg_text = (!empty($user->lang[$msg_text])) ? $user->lang[$msg_text] : $msg_text;
			$msg_title = (!isset($msg_title)) ? $user->lang['INFORMATION'] : ((!empty($user->lang[$msg_title])) ? $user->lang[$msg_title] : $msg_title);

			if (!defined('HEADER_INC'))
			{
				if (defined('IN_ADMIN') && isset($user->data['session_admin']) && $user->data['session_admin'])
				{
					adm_page_header($msg_title);
				}
				else
				{
					page_header($msg_title);
				}
			}

			$template->set_filenames(array(
				'body' => 'message_body.html')
			);

			$template->assign_vars(array(
				'MESSAGE_TITLE'		=> $msg_title,
				'MESSAGE_TEXT'		=> $msg_text,
				'S_USER_WARNING'	=> ($errno == E_USER_WARNING) ? true : false,
				'S_USER_NOTICE'		=> ($errno == E_USER_NOTICE) ? true : false)
			);

			if ($request->is_ajax())
			{
				global $refresh_data;

				$json_response = new \phpbb\json_response;
				$json_response->send(array(
					'MESSAGE_TITLE'		=> $msg_title,
					'MESSAGE_TEXT'		=> $msg_text,
					'S_USER_WARNING'	=> ($errno == E_USER_WARNING) ? true : false,
					'S_USER_NOTICE'		=> ($errno == E_USER_NOTICE) ? true : false,
					'REFRESH_DATA'		=> (!empty($refresh_data)) ? $refresh_data : null
				));
			}

			// We do not want the cron script to be called on error messages
			define('IN_CRON', true);

			if (defined('IN_ADMIN') && isset($user->data['session_admin']) && $user->data['session_admin'])
			{
				adm_page_footer();
			}
			else
			{
				page_footer();
			}

			exit_handler();
		break;

		// PHP4 compatibility
		case E_DEPRECATED:
			return true;
		break;
	}

	// If we notice an error not handled here we pass this back to PHP by returning false
	// This may not work for all php versions
	return false;
}

/**
* Removes absolute path to phpBB root directory from error messages
* and converts backslashes to forward slashes.
*
* @param string $errfile	Absolute file path
*							(e.g. /var/www/phpbb3/phpBB/includes/functions.php)
*							Please note that if $errfile is outside of the phpBB root,
*							the root path will not be found and can not be filtered.
* @return string			Relative file path
*							(e.g. /includes/functions.php)
*/
function phpbb_filter_root_path($errfile)
{
	global $phpbb_filesystem;

	static $root_path;

	if (empty($root_path))
	{
		if ($phpbb_filesystem)
		{
			$root_path = $phpbb_filesystem->realpath(__DIR__ . '/../');
		}
		else
		{
			$filesystem = new \phpbb\filesystem\filesystem();
			$root_path = $filesystem->realpath(__DIR__ . '/../');
		}
	}

	return str_replace(array($root_path, '\\'), array('[ROOT]', '/'), $errfile);
}

/**
* Queries the session table to get information about online guests
* @param int $item_id Limits the search to the item with this id
* @param string $item The name of the item which is stored in the session table as session_{$item}_id
* @return int The number of active distinct guest sessions
*/
function obtain_guest_count($item_id = 0, $item = 'forum')
{
	global $db, $config;

	if ($item_id)
	{
		$reading_sql = ' AND s.session_' . $item . '_id = ' . (int) $item_id;
	}
	else
	{
		$reading_sql = '';
	}
	$time = (time() - (intval($config['load_online_time']) * 60));

	// Get number of online guests

	if ($db->get_sql_layer() === 'sqlite3')
	{
		$sql = 'SELECT COUNT(session_ip) as num_guests
			FROM (
				SELECT DISTINCT s.session_ip
				FROM ' . SESSIONS_TABLE . ' s
				WHERE s.session_user_id = ' . ANONYMOUS . '
					AND s.session_time >= ' . ($time - ((int) ($time % 60))) .
				$reading_sql .
			')';
	}
	else
	{
		$sql = 'SELECT COUNT(DISTINCT s.session_ip) as num_guests
			FROM ' . SESSIONS_TABLE . ' s
			WHERE s.session_user_id = ' . ANONYMOUS . '
				AND s.session_time >= ' . ($time - ((int) ($time % 60))) .
			$reading_sql;
	}
	$result = $db->sql_query($sql);
	$guests_online = (int) $db->sql_fetchfield('num_guests');
	$db->sql_freeresult($result);

	return $guests_online;
}

/**
* Queries the session table to get information about online users
* @param int $item_id Limits the search to the item with this id
* @param string $item The name of the item which is stored in the session table as session_{$item}_id
* @return array An array containing the ids of online, hidden and visible users, as well as statistical info
*/
function obtain_users_online($item_id = 0, $item = 'forum')
{
	global $db, $config;

	$reading_sql = '';
	if ($item_id !== 0)
	{
		$reading_sql = ' AND s.session_' . $item . '_id = ' . (int) $item_id;
	}

	$online_users = array(
		'online_users'			=> array(),
		'hidden_users'			=> array(),
		'total_online'			=> 0,
		'visible_online'		=> 0,
		'hidden_online'			=> 0,
		'guests_online'			=> 0,
	);

	if ($config['load_online_guests'])
	{
		$online_users['guests_online'] = obtain_guest_count($item_id, $item);
	}

	// a little discrete magic to cache this for 30 seconds
	$time = (time() - (intval($config['load_online_time']) * 60));

	$sql = 'SELECT s.session_user_id, s.session_ip, s.session_viewonline
		FROM ' . SESSIONS_TABLE . ' s
		WHERE s.session_time >= ' . ($time - ((int) ($time % 30))) .
			$reading_sql .
		' AND s.session_user_id <> ' . ANONYMOUS;
	$result = $db->sql_query($sql);

	while ($row = $db->sql_fetchrow($result))
	{
		// Skip multiple sessions for one user
		if (!isset($online_users['online_users'][$row['session_user_id']]))
		{
			$online_users['online_users'][$row['session_user_id']] = (int) $row['session_user_id'];
			if ($row['session_viewonline'])
			{
				$online_users['visible_online']++;
			}
			else
			{
				$online_users['hidden_users'][$row['session_user_id']] = (int) $row['session_user_id'];
				$online_users['hidden_online']++;
			}
		}
	}
	$online_users['total_online'] = $online_users['guests_online'] + $online_users['visible_online'] + $online_users['hidden_online'];
	$db->sql_freeresult($result);

	return $online_users;
}

/**
* Uses the result of obtain_users_online to generate a localized, readable representation.
* @param mixed $online_users result of obtain_users_online - array with user_id lists for total, hidden and visible users, and statistics
* @param int $item_id Indicate that the data is limited to one item and not global
* @param string $item The name of the item which is stored in the session table as session_{$item}_id
* @return array An array containing the string for output to the template
*/
function obtain_users_online_string($online_users, $item_id = 0, $item = 'forum')
{
	global $config, $db, $user, $auth, $phpbb_dispatcher;

	$user_online_link = $rowset = array();
	// Need caps version of $item for language-strings
	$item_caps = strtoupper($item);

	if (count($online_users['online_users']))
	{
		$sql_ary = array(
			'SELECT'	=> 'u.username, u.username_clean, u.user_id, u.user_type, u.user_allow_viewonline, u.user_colour',
			'FROM'		=> array(
				USERS_TABLE	=> 'u',
			),
			'WHERE'		=> $db->sql_in_set('u.user_id', $online_users['online_users']),
			'ORDER_BY'	=> 'u.username_clean ASC',
		);

		/**
		* Modify SQL query to obtain online users data
		*
		* @event core.obtain_users_online_string_sql
		* @var	array	online_users	Array with online users data
		*								from obtain_users_online()
		* @var	int		item_id			Restrict online users to item id
		* @var	string	item			Restrict online users to a certain
		*								session item, e.g. forum for
		*								session_forum_id
		* @var	array	sql_ary			SQL query array to obtain users online data
		* @since 3.1.4-RC1
		* @changed 3.1.7-RC1			Change sql query into array and adjust var accordingly. Allows extension authors the ability to adjust the sql_ary.
		*/
		$vars = array('online_users', 'item_id', 'item', 'sql_ary');
		extract($phpbb_dispatcher->trigger_event('core.obtain_users_online_string_sql', compact($vars)));

		$result = $db->sql_query($db->sql_build_query('SELECT', $sql_ary));
		$rowset = $db->sql_fetchrowset($result);
		$db->sql_freeresult($result);

		foreach ($rowset as $row)
		{
			// User is logged in and therefore not a guest
			if ($row['user_id'] != ANONYMOUS)
			{
				if (isset($online_users['hidden_users'][$row['user_id']]))
				{
					$row['username'] = '<em>' . $row['username'] . '</em>';
				}

				if (!isset($online_users['hidden_users'][$row['user_id']]) || $auth->acl_get('u_viewonline') || $row['user_id'] === $user->data['user_id'])
				{
					$user_online_link[$row['user_id']] = get_username_string(($row['user_type'] <> USER_IGNORE) ? 'full' : 'no_profile', $row['user_id'], $row['username'], $row['user_colour']);
				}
			}
		}
	}

	/**
	* Modify online userlist data
	*
	* @event core.obtain_users_online_string_before_modify
	* @var	array	online_users		Array with online users data
	*									from obtain_users_online()
	* @var	int		item_id				Restrict online users to item id
	* @var	string	item				Restrict online users to a certain
	*									session item, e.g. forum for
	*									session_forum_id
	* @var	array	rowset				Array with online users data
	* @var	array	user_online_link	Array with online users items (usernames)
	* @since 3.1.10-RC1
	*/
	$vars = array(
		'online_users',
		'item_id',
		'item',
		'rowset',
		'user_online_link',
	);
	extract($phpbb_dispatcher->trigger_event('core.obtain_users_online_string_before_modify', compact($vars)));

	$online_userlist = implode(', ', $user_online_link);

	if (!$online_userlist)
	{
		$online_userlist = $user->lang['NO_ONLINE_USERS'];
	}

	if ($item_id === 0)
	{
		$online_userlist = $user->lang['REGISTERED_USERS'] . ' ' . $online_userlist;
	}
	else if ($config['load_online_guests'])
	{
		$online_userlist = $user->lang('BROWSING_' . $item_caps . '_GUESTS', $online_users['guests_online'], $online_userlist);
	}
	else
	{
		$online_userlist = sprintf($user->lang['BROWSING_' . $item_caps], $online_userlist);
	}
	// Build online listing
	$visible_online = $user->lang('REG_USERS_TOTAL', (int) $online_users['visible_online']);
	$hidden_online = $user->lang('HIDDEN_USERS_TOTAL', (int) $online_users['hidden_online']);

	if ($config['load_online_guests'])
	{
		$guests_online = $user->lang('GUEST_USERS_TOTAL', (int) $online_users['guests_online']);
		$l_online_users = $user->lang('ONLINE_USERS_TOTAL_GUESTS', (int) $online_users['total_online'], $visible_online, $hidden_online, $guests_online);
	}
	else
	{
		$l_online_users = $user->lang('ONLINE_USERS_TOTAL', (int) $online_users['total_online'], $visible_online, $hidden_online);
	}

	/**
	* Modify online userlist data
	*
	* @event core.obtain_users_online_string_modify
	* @var	array	online_users		Array with online users data
	*									from obtain_users_online()
	* @var	int		item_id				Restrict online users to item id
	* @var	string	item				Restrict online users to a certain
	*									session item, e.g. forum for
	*									session_forum_id
	* @var	array	rowset				Array with online users data
	* @var	array	user_online_link	Array with online users items (usernames)
	* @var	string	online_userlist		String containing users online list
	* @var	string	l_online_users		String with total online users count info
	* @since 3.1.4-RC1
	*/
	$vars = array(
		'online_users',
		'item_id',
		'item',
		'rowset',
		'user_online_link',
		'online_userlist',
		'l_online_users',
	);
	extract($phpbb_dispatcher->trigger_event('core.obtain_users_online_string_modify', compact($vars)));

	return array(
		'online_userlist'	=> $online_userlist,
		'l_online_users'	=> $l_online_users,
	);
}

/**
* Get option bitfield from custom data
*
* @param int	$bit		The bit/value to get
* @param int	$data		Current bitfield to check
* @return bool	Returns true if value of constant is set in bitfield, else false
*/
function phpbb_optionget($bit, $data)
{
	return ($data & 1 << (int) $bit) ? true : false;
}

/**
* Set option bitfield
*
* @param int	$bit		The bit/value to set/unset
* @param bool	$set		True if option should be set, false if option should be unset.
* @param int	$data		Current bitfield to change
*
* @return int	The new bitfield
*/
function phpbb_optionset($bit, $set, $data)
{
	if ($set && !($data & 1 << $bit))
	{
		$data += 1 << $bit;
	}
	else if (!$set && ($data & 1 << $bit))
	{
		$data -= 1 << $bit;
	}

	return $data;
}


/**
* Escapes and quotes a string for use as an HTML/XML attribute value.
*
* This is a port of Python xml.sax.saxutils quoteattr.
*
* The function will attempt to choose a quote character in such a way as to
* avoid escaping quotes in the string. If this is not possible the string will
* be wrapped in double quotes and double quotes will be escaped.
*
* @param string $data The string to be escaped
* @param array $entities Associative array of additional entities to be escaped
* @return string Escaped and quoted string
*/
function phpbb_quoteattr($data, $entities = null)
{
	$data = str_replace('&', '&amp;', $data);
	$data = str_replace('>', '&gt;', $data);
	$data = str_replace('<', '&lt;', $data);

	$data = str_replace("\n", '&#10;', $data);
	$data = str_replace("\r", '&#13;', $data);
	$data = str_replace("\t", '&#9;', $data);

	if (!empty($entities))
	{
		$data = str_replace(array_keys($entities), array_values($entities), $data);
	}

	if (strpos($data, '"') !== false)
	{
		if (strpos($data, "'") !== false)
		{
			$data = '"' . str_replace('"', '&quot;', $data) . '"';
		}
		else
		{
			$data = "'" . $data . "'";
		}
	}
	else
	{
		$data = '"' . $data . '"';
	}

	return $data;
}

/**
* Get user avatar
*
* @param array $user_row Row from the users table
* @param string $alt Optional language string for alt tag within image, can be a language key or text
* @param bool $ignore_config Ignores the config-setting, to be still able to view the avatar in the UCP
* @param bool $lazy If true, will be lazy loaded (requires JS)
*
* @return string Avatar html
*/
function phpbb_get_user_avatar($user_row, $alt = 'USER_AVATAR', $ignore_config = false, $lazy = false)
{
	$row = \phpbb\avatar\manager::clean_row($user_row, 'user');
	return phpbb_get_avatar($row, $alt, $ignore_config, $lazy);
}

/**
* Get group avatar
*
* @param array $group_row Row from the groups table
* @param string $alt Optional language string for alt tag within image, can be a language key or text
* @param bool $ignore_config Ignores the config-setting, to be still able to view the avatar in the UCP
* @param bool $lazy If true, will be lazy loaded (requires JS)
*
* @return string Avatar html
*/
function phpbb_get_group_avatar($group_row, $alt = 'GROUP_AVATAR', $ignore_config = false, $lazy = false)
{
	$row = \phpbb\avatar\manager::clean_row($group_row, 'group');
	return phpbb_get_avatar($row, $alt, $ignore_config, $lazy);
}

/**
* Get avatar
*
* @param array $row Row cleaned by \phpbb\avatar\manager::clean_row
* @param string $alt Optional language string for alt tag within image, can be a language key or text
* @param bool $ignore_config Ignores the config-setting, to be still able to view the avatar in the UCP
* @param bool $lazy If true, will be lazy loaded (requires JS)
*
* @return string Avatar html
*/
function phpbb_get_avatar($row, $alt, $ignore_config = false, $lazy = false)
{
	global $user, $config;
	global $phpbb_container, $phpbb_dispatcher;

	if (!$config['allow_avatar'] && !$ignore_config)
	{
		return '';
	}

	$avatar_data = array(
		'src' => $row['avatar'],
		'width' => $row['avatar_width'],
		'height' => $row['avatar_height'],
	);

	/* @var $phpbb_avatar_manager \phpbb\avatar\manager */
	$phpbb_avatar_manager = $phpbb_container->get('avatar.manager');
	$driver = $phpbb_avatar_manager->get_driver($row['avatar_type'], !$ignore_config);
	$html = '';

	if ($driver)
	{
		$html = $driver->get_custom_html($user, $row, $alt);
		$avatar_data = $driver->get_data($row);
	}
	else
	{
		$avatar_data['src'] = '';
	}

	if (empty($html) && !empty($avatar_data['src']))
	{
		if ($lazy)
		{
			// This path is sent with the base template paths in the assign_vars()
			// call below. We need to correct it in case we are accessing from a
			// controller because the web paths will be incorrect otherwise.
			$phpbb_path_helper = $phpbb_container->get('path_helper');
			$web_path = $phpbb_path_helper->get_web_root_path();

			$theme = "{$web_path}styles/" . rawurlencode($user->style['style_path']) . '/theme';

			$src = 'src="' . $theme . '/images/no_avatar.gif" data-src="' . $avatar_data['src'] . '"';
		}
		else
		{
			$src = 'src="' . $avatar_data['src'] . '"';
		}

		$html = '<img class="avatar" ' . $src . ' ' .
			($avatar_data['width'] ? ('width="' . $avatar_data['width'] . '" ') : '') .
			($avatar_data['height'] ? ('height="' . $avatar_data['height'] . '" ') : '') .
			'alt="' . ((!empty($user->lang[$alt])) ? $user->lang[$alt] : $alt) . '" />';
	}

	/**
	* Event to modify HTML <img> tag of avatar
	*
	* @event core.get_avatar_after
	* @var	array	row				Row cleaned by \phpbb\avatar\manager::clean_row
	* @var	string	alt				Optional language string for alt tag within image, can be a language key or text
	* @var	bool	ignore_config	Ignores the config-setting, to be still able to view the avatar in the UCP
	* @var	array	avatar_data		The HTML attributes for avatar <img> tag
	* @var	string	html			The HTML <img> tag of generated avatar
	* @since 3.1.6-RC1
	*/
	$vars = array('row', 'alt', 'ignore_config', 'avatar_data', 'html');
	extract($phpbb_dispatcher->trigger_event('core.get_avatar_after', compact($vars)));

	return $html;
}

/**
* Generate page header
*/
function page_header($page_title = '', $display_online_list = false, $item_id = 0, $item = 'forum', $send_headers = true)
{
	global $db, $config, $template, $SID, $_SID, $_EXTRA_URL, $user, $auth, $phpEx, $phpbb_root_path;
	global $phpbb_dispatcher, $request, $phpbb_container, $phpbb_admin_path;

	if (defined('HEADER_INC'))
	{
		return;
	}

	define('HEADER_INC', true);

	// A listener can set this variable to `true` when it overrides this function
	$page_header_override = false;

	/**
	* Execute code and/or overwrite page_header()
	*
	* @event core.page_header
	* @var	string	page_title			Page title
	* @var	bool	display_online_list		Do we display online users list
	* @var	string	item				Restrict online users to a certain
	*									session item, e.g. forum for
	*									session_forum_id
	* @var	int		item_id				Restrict online users to item id
	* @var	bool	page_header_override	Shall we return instead of running
	*										the rest of page_header()
	* @since 3.1.0-a1
	*/
	$vars = array('page_title', 'display_online_list', 'item_id', 'item', 'page_header_override');
	extract($phpbb_dispatcher->trigger_event('core.page_header', compact($vars)));

	if ($page_header_override)
	{
		return;
	}

	// gzip_compression
	if ($config['gzip_compress'])
	{
		// to avoid partially compressed output resulting in blank pages in
		// the browser or error messages, compression is disabled in a few cases:
		//
		// 1) if headers have already been sent, this indicates plaintext output
		//    has been started so further content must not be compressed
		// 2) the length of the current output buffer is non-zero. This means
		//    there is already some uncompressed content in this output buffer
		//    so further output must not be compressed
		// 3) if more than one level of output buffering is used because we
		//    cannot test all output buffer level content lengths. One level
		//    could be caused by php.ini output_buffering. Anything
		//    beyond that is manual, so the code wrapping phpBB in output buffering
		//    can easily compress the output itself.
		//
		if (@extension_loaded('zlib') && !headers_sent() && ob_get_level() <= 1 && ob_get_length() == 0)
		{
			ob_start('ob_gzhandler');
		}
	}

	$user->update_session_infos();

	// Generate logged in/logged out status
	if ($user->data['user_id'] != ANONYMOUS)
	{
		$u_login_logout = append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=logout', true, $user->session_id);
		$l_login_logout = $user->lang['LOGOUT'];
	}
	else
	{
		$redirect = $request->variable('redirect', rawurlencode($user->page['page']));
		$u_login_logout = append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=login&amp;redirect=' . $redirect);
		$l_login_logout = $user->lang['LOGIN'];
	}

	// Last visit date/time
	$s_last_visit = ($user->data['user_id'] != ANONYMOUS) ? $user->format_date($user->data['session_last_visit']) : '';

	// Get users online list ... if required
	$l_online_users = $online_userlist = $l_online_record = $l_online_time = '';

	if ($config['load_online'] && $config['load_online_time'] && $display_online_list)
	{
		/**
		* Load online data:
		* For obtaining another session column use $item and $item_id in the function-parameter, whereby the column is session_{$item}_id.
		*/
		$item_id = max($item_id, 0);

		$online_users = obtain_users_online($item_id, $item);
		$user_online_strings = obtain_users_online_string($online_users, $item_id, $item);

		$l_online_users = $user_online_strings['l_online_users'];
		$online_userlist = $user_online_strings['online_userlist'];
		$total_online_users = $online_users['total_online'];

		if ($total_online_users > $config['record_online_users'])
		{
			$config->set('record_online_users', $total_online_users, false);
			$config->set('record_online_date', time(), false);
		}

		$l_online_record = $user->lang('RECORD_ONLINE_USERS', (int) $config['record_online_users'], $user->format_date($config['record_online_date'], false, true));

		$l_online_time = $user->lang('VIEW_ONLINE_TIMES', (int) $config['load_online_time']);
	}

	$s_privmsg_new = false;

	// Check for new private messages if user is logged in
	if (!empty($user->data['is_registered']))
	{
		if ($user->data['user_new_privmsg'])
		{
			if (!$user->data['user_last_privmsg'] || $user->data['user_last_privmsg'] > $user->data['session_last_visit'])
			{
				$sql = 'UPDATE ' . USERS_TABLE . '
					SET user_last_privmsg = ' . $user->data['session_last_visit'] . '
					WHERE user_id = ' . $user->data['user_id'];
				$db->sql_query($sql);

				$s_privmsg_new = true;
			}
			else
			{
				$s_privmsg_new = false;
			}
		}
		else
		{
			$s_privmsg_new = false;
		}
	}

	// Negative forum and topic IDs are not allowed
	$forum_id = max(0, $request->variable('f', 0));
	$topic_id = max(0, $request->variable('t', 0));

	$s_feed_news = false;

	// Get option for news
	if ($config['feed_enable'])
	{
		$sql = 'SELECT forum_id
			FROM ' . FORUMS_TABLE . '
			WHERE ' . $db->sql_bit_and('forum_options', FORUM_OPTION_FEED_NEWS, '<> 0');
		$result = $db->sql_query_limit($sql, 1, 0, 600);
		$s_feed_news = (int) $db->sql_fetchfield('forum_id');
		$db->sql_freeresult($result);
	}

	// This path is sent with the base template paths in the assign_vars()
	// call below. We need to correct it in case we are accessing from a
	// controller because the web paths will be incorrect otherwise.
	/* @var $phpbb_path_helper \phpbb\path_helper */
	$phpbb_path_helper = $phpbb_container->get('path_helper');
	$web_path = $phpbb_path_helper->get_web_root_path();

	// Send a proper content-language to the output
	$user_lang = $user->lang['USER_LANG'];
	if (strpos($user_lang, '-x-') !== false)
	{
		$user_lang = substr($user_lang, 0, strpos($user_lang, '-x-'));
	}

	$s_search_hidden_fields = array();
	if ($_SID)
	{
		$s_search_hidden_fields['sid'] = $_SID;
	}

	if (!empty($_EXTRA_URL))
	{
		foreach ($_EXTRA_URL as $url_param)
		{
			$url_param = explode('=', $url_param, 2);
			$s_search_hidden_fields[$url_param[0]] = $url_param[1];
		}
	}

	$dt = $user->create_datetime();
	$timezone_offset = $user->lang(array('timezones', 'UTC_OFFSET'), phpbb_format_timezone_offset($dt->getOffset()));
	$timezone_name = $user->timezone->getName();
	if (isset($user->lang['timezones'][$timezone_name]))
	{
		$timezone_name = $user->lang['timezones'][$timezone_name];
	}

	// Output the notifications
	$notifications = false;
	if ($config['load_notifications'] && $config['allow_board_notifications'] && $user->data['user_id'] != ANONYMOUS && $user->data['user_type'] != USER_IGNORE)
	{
		/* @var $phpbb_notifications \phpbb\notification\manager */
		$phpbb_notifications = $phpbb_container->get('notification_manager');

		$notifications = $phpbb_notifications->load_notifications('notification.method.board', array(
			'all_unread'	=> true,
			'limit'			=> 5,
		));

		foreach ($notifications['notifications'] as $notification)
		{
			$template->assign_block_vars('notifications', $notification->prepare_for_display());
		}
	}

	/** @var \phpbb\controller\helper $controller_helper */
	$controller_helper = $phpbb_container->get('controller.helper');
	$notification_mark_hash = generate_link_hash('mark_all_notifications_read');

	$s_login_redirect = build_hidden_fields(array('redirect' => $phpbb_path_helper->remove_web_root_path(build_url())));

	// Add form token for login box, in case page is presenting a login form.
	add_form_key('login', '_LOGIN');

	/**
	 * Workaround for missing template variable in pre phpBB 3.2.6 styles.
	 * @deprecated 3.2.7 (To be removed: 4.0.0-a1)
	 */
	$form_token_login = $template->retrieve_var('S_FORM_TOKEN_LOGIN');
	if (!empty($form_token_login))
	{
		$s_login_redirect .= $form_token_login;
		// Remove S_FORM_TOKEN_LOGIN as it's already appended to S_LOGIN_REDIRECT
		$template->assign_var('S_FORM_TOKEN_LOGIN', '');
	}

	// The following assigns all _common_ variables that may be used at any point in a template.
	$template->assign_vars(array(
		'SITENAME'						=> $config['sitename'],
		'SITE_DESCRIPTION'				=> $config['site_desc'],
		'PAGE_TITLE'					=> $page_title,
		'SCRIPT_NAME'					=> str_replace('.' . $phpEx, '', $user->page['page_name']),
		'LAST_VISIT_DATE'				=> sprintf($user->lang['YOU_LAST_VISIT'], $s_last_visit),
		'LAST_VISIT_YOU'				=> $s_last_visit,
		'CURRENT_TIME'					=> sprintf($user->lang['CURRENT_TIME'], $user->format_date(time(), false, true)),
		'TOTAL_USERS_ONLINE'			=> $l_online_users,
		'LOGGED_IN_USER_LIST'			=> $online_userlist,
		'RECORD_USERS'					=> $l_online_record,

		'PRIVATE_MESSAGE_COUNT'			=> (!empty($user->data['user_unread_privmsg'])) ? $user->data['user_unread_privmsg'] : 0,
		'CURRENT_USER_AVATAR'			=> phpbb_get_user_avatar($user->data),
		'CURRENT_USERNAME_SIMPLE'		=> get_username_string('no_profile', $user->data['user_id'], $user->data['username'], $user->data['user_colour']),
		'CURRENT_USERNAME_FULL'			=> get_username_string('full', $user->data['user_id'], $user->data['username'], $user->data['user_colour']),
		'UNREAD_NOTIFICATIONS_COUNT'	=> ($notifications !== false) ? $notifications['unread_count'] : '',
		'NOTIFICATIONS_COUNT'			=> ($notifications !== false) ? $notifications['unread_count'] : '',
		'U_VIEW_ALL_NOTIFICATIONS'		=> append_sid("{$phpbb_root_path}ucp.$phpEx", 'i=ucp_notifications'),
		'U_MARK_ALL_NOTIFICATIONS'		=> append_sid("{$phpbb_root_path}ucp.$phpEx", 'i=ucp_notifications&amp;mode=notification_list&amp;mark=all&amp;token=' . $notification_mark_hash),
		'U_NOTIFICATION_SETTINGS'		=> append_sid("{$phpbb_root_path}ucp.$phpEx", 'i=ucp_notifications&amp;mode=notification_options'),
		'S_NOTIFICATIONS_DISPLAY'		=> $config['load_notifications'] && $config['allow_board_notifications'],

		'S_USER_NEW_PRIVMSG'			=> $user->data['user_new_privmsg'],
		'S_USER_UNREAD_PRIVMSG'			=> $user->data['user_unread_privmsg'],
		'S_USER_NEW'					=> $user->data['user_new'],

		'SID'				=> $SID,
		'_SID'				=> $_SID,
		'SESSION_ID'		=> $user->session_id,
		'ROOT_PATH'			=> $web_path,
		'BOARD_URL'			=> generate_board_url() . '/',

		'L_LOGIN_LOGOUT'	=> $l_login_logout,
		'L_INDEX'			=> ($config['board_index_text'] !== '') ? $config['board_index_text'] : $user->lang['FORUM_INDEX'],
		'L_SITE_HOME'		=> ($config['site_home_text'] !== '') ? $config['site_home_text'] : $user->lang['HOME'],
		'L_ONLINE_EXPLAIN'	=> $l_online_time,

		'U_PRIVATEMSGS'			=> append_sid("{$phpbb_root_path}ucp.$phpEx", 'i=pm&amp;folder=inbox'),
		'U_RETURN_INBOX'		=> append_sid("{$phpbb_root_path}ucp.$phpEx", 'i=pm&amp;folder=inbox'),
		'U_MEMBERLIST'			=> append_sid("{$phpbb_root_path}memberlist.$phpEx"),
		'U_VIEWONLINE'			=> ($auth->acl_gets('u_viewprofile', 'a_user', 'a_useradd', 'a_userdel')) ? append_sid("{$phpbb_root_path}viewonline.$phpEx") : '',
		'U_LOGIN_LOGOUT'		=> $u_login_logout,
		'U_INDEX'				=> append_sid("{$phpbb_root_path}index.$phpEx"),
		'U_SEARCH'				=> append_sid("{$phpbb_root_path}search.$phpEx"),
		'U_SITE_HOME'			=> $config['site_home_url'],
		'U_REGISTER'			=> append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=register'),
		'U_PROFILE'				=> append_sid("{$phpbb_root_path}ucp.$phpEx"),
		'U_USER_PROFILE'		=> get_username_string('profile', $user->data['user_id'], $user->data['username'], $user->data['user_colour']),
		'U_MODCP'				=> append_sid("{$phpbb_root_path}mcp.$phpEx", false, true, $user->session_id),
		'U_FAQ'					=> $controller_helper->route('phpbb_help_faq_controller'),
		'U_SEARCH_SELF'			=> append_sid("{$phpbb_root_path}search.$phpEx", 'search_id=egosearch'),
		'U_SEARCH_NEW'			=> append_sid("{$phpbb_root_path}search.$phpEx", 'search_id=newposts'),
		'U_SEARCH_UNANSWERED'	=> append_sid("{$phpbb_root_path}search.$phpEx", 'search_id=unanswered'),
		'U_SEARCH_UNREAD'		=> append_sid("{$phpbb_root_path}search.$phpEx", 'search_id=unreadposts'),
		'U_SEARCH_ACTIVE_TOPICS'=> append_sid("{$phpbb_root_path}search.$phpEx", 'search_id=active_topics'),
		'U_DELETE_COOKIES'		=> $controller_helper->route('phpbb_ucp_delete_cookies_controller'),
		'U_CONTACT_US'			=> ($config['contact_admin_form_enable'] && $config['email_enable']) ? append_sid("{$phpbb_root_path}memberlist.$phpEx", 'mode=contactadmin') : '',
		'U_TEAM'				=> (!$auth->acl_get('u_viewprofile')) ? '' : append_sid("{$phpbb_root_path}memberlist.$phpEx", 'mode=team'),
		'U_TERMS_USE'			=> append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=terms'),
		'U_PRIVACY'				=> append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=privacy'),
		'UA_PRIVACY'			=> addslashes(append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=privacy')),
		'U_RESTORE_PERMISSIONS'	=> ($user->data['user_perm_from'] && $auth->acl_get('a_switchperm')) ? append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=restore_perm') : '',
		'U_FEED'				=> $controller_helper->route('phpbb_feed_index'),

		'S_USER_LOGGED_IN'		=> ($user->data['user_id'] != ANONYMOUS) ? true : false,
		'S_AUTOLOGIN_ENABLED'	=> ($config['allow_autologin']) ? true : false,
		'S_BOARD_DISABLED'		=> ($config['board_disable']) ? true : false,
		'S_REGISTERED_USER'		=> (!empty($user->data['is_registered'])) ? true : false,
		'S_IS_BOT'				=> (!empty($user->data['is_bot'])) ? true : false,
		'S_USER_LANG'			=> $user_lang,
		'S_USER_BROWSER'		=> (isset($user->data['session_browser'])) ? $user->data['session_browser'] : $user->lang['UNKNOWN_BROWSER'],
		'S_USERNAME'			=> $user->data['username'],
		'S_CONTENT_DIRECTION'	=> $user->lang['DIRECTION'],
		'S_CONTENT_FLOW_BEGIN'	=> ($user->lang['DIRECTION'] == 'ltr') ? 'left' : 'right',
		'S_CONTENT_FLOW_END'	=> ($user->lang['DIRECTION'] == 'ltr') ? 'right' : 'left',
		'S_CONTENT_ENCODING'	=> 'UTF-8',
		'S_TIMEZONE'			=> sprintf($user->lang['ALL_TIMES'], $timezone_offset, $timezone_name),
		'S_DISPLAY_ONLINE_LIST'	=> ($l_online_time) ? 1 : 0,
		'S_DISPLAY_SEARCH'		=> (!$config['load_search']) ? 0 : (isset($auth) ? ($auth->acl_get('u_search') && $auth->acl_getf_global('f_search')) : 1),
		'S_DISPLAY_PM'			=> ($config['allow_privmsg'] && !empty($user->data['is_registered']) && ($auth->acl_get('u_readpm') || $auth->acl_get('u_sendpm'))) ? true : false,
		'S_DISPLAY_MEMBERLIST'	=> (isset($auth)) ? $auth->acl_get('u_viewprofile') : 0,
		'S_NEW_PM'				=> ($s_privmsg_new) ? 1 : 0,
		'S_REGISTER_ENABLED'	=> ($config['require_activation'] != USER_ACTIVATION_DISABLE) ? true : false,
		'S_FORUM_ID'			=> $forum_id,
		'S_TOPIC_ID'			=> $topic_id,

		'S_LOGIN_ACTION'		=> ((!defined('ADMIN_START')) ? append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=login') : append_sid("{$phpbb_admin_path}index.$phpEx", false, true, $user->session_id)),
		'S_LOGIN_REDIRECT'		=> $s_login_redirect,

		'S_ENABLE_FEEDS'			=> ($config['feed_enable']) ? true : false,
		'S_ENABLE_FEEDS_OVERALL'	=> ($config['feed_overall']) ? true : false,
		'S_ENABLE_FEEDS_FORUMS'		=> ($config['feed_overall_forums']) ? true : false,
		'S_ENABLE_FEEDS_TOPICS'		=> ($config['feed_topics_new']) ? true : false,
		'S_ENABLE_FEEDS_TOPICS_ACTIVE'	=> ($config['feed_topics_active']) ? true : false,
		'S_ENABLE_FEEDS_NEWS'		=> ($s_feed_news) ? true : false,

		'S_LOAD_UNREADS'			=> (bool) $config['load_unreads_search'] && ($config['load_anon_lastread'] || !empty($user->data['is_registered'])),

		'S_SEARCH_HIDDEN_FIELDS'	=> build_hidden_fields($s_search_hidden_fields),

		'T_ASSETS_VERSION'		=> $config['assets_version'],
		'T_ASSETS_PATH'			=> "{$web_path}assets",
		'T_THEME_PATH'			=> "{$web_path}styles/" . rawurlencode($user->style['style_path']) . '/theme',
		'T_TEMPLATE_PATH'		=> "{$web_path}styles/" . rawurlencode($user->style['style_path']) . '/template',
		'T_SUPER_TEMPLATE_PATH'	=> "{$web_path}styles/" . rawurlencode($user->style['style_path']) . '/template',
		'T_IMAGES_PATH'			=> "{$web_path}images/",
		'T_SMILIES_PATH'		=> "{$web_path}{$config['smilies_path']}/",
		'T_AVATAR_PATH'			=> "{$web_path}{$config['avatar_path']}/",
		'T_AVATAR_GALLERY_PATH'	=> "{$web_path}{$config['avatar_gallery_path']}/",
		'T_ICONS_PATH'			=> "{$web_path}{$config['icons_path']}/",
		'T_RANKS_PATH'			=> "{$web_path}{$config['ranks_path']}/",
		'T_UPLOAD_PATH'			=> "{$web_path}{$config['upload_path']}/",
		'T_STYLESHEET_LINK'		=> "{$web_path}styles/" . rawurlencode($user->style['style_path']) . '/theme/stylesheet.css?assets_version=' . $config['assets_version'],
		'T_STYLESHEET_LANG_LINK'=> "{$web_path}styles/" . rawurlencode($user->style['style_path']) . '/theme/' . $user->lang_name . '/stylesheet.css?assets_version=' . $config['assets_version'],

		'T_FONT_AWESOME_LINK'	=> !empty($config['allow_cdn']) && !empty($config['load_font_awesome_url']) ? $config['load_font_awesome_url'] : "{$web_path}assets/css/font-awesome.min.css?assets_version=" . $config['assets_version'],

		'T_JQUERY_LINK'			=> !empty($config['allow_cdn']) && !empty($config['load_jquery_url']) ? $config['load_jquery_url'] : "{$web_path}assets/javascript/jquery-3.7.1.min.js?assets_version=" . $config['assets_version'],
		'S_ALLOW_CDN'			=> !empty($config['allow_cdn']),
		'S_COOKIE_NOTICE'		=> !empty($config['cookie_notice']),

		'T_THEME_NAME'			=> rawurlencode($user->style['style_path']),
		'T_THEME_LANG_NAME'		=> $user->lang_name,
		'T_TEMPLATE_NAME'		=> $user->style['style_path'],
		'T_SUPER_TEMPLATE_NAME'	=> rawurlencode((isset($user->style['style_parent_tree']) && $user->style['style_parent_tree']) ? $user->style['style_parent_tree'] : $user->style['style_path']),
		'T_IMAGES'				=> 'images',
		'T_SMILIES'				=> $config['smilies_path'],
		'T_AVATAR'				=> $config['avatar_path'],
		'T_AVATAR_GALLERY'		=> $config['avatar_gallery_path'],
		'T_ICONS'				=> $config['icons_path'],
		'T_RANKS'				=> $config['ranks_path'],
		'T_UPLOAD'				=> $config['upload_path'],

		'SITE_LOGO_IMG'			=> $user->img('site_logo'),
	));

	$http_headers = array();

	if ($send_headers)
	{
		// An array of http headers that phpBB will set. The following event may override these.
		$http_headers += array(
			// application/xhtml+xml not used because of IE
			'Content-type' => 'text/html; charset=UTF-8',
			'Cache-Control' => 'private, no-cache="set-cookie"',
			'Expires' => gmdate('D, d M Y H:i:s', time()) . ' GMT',
			'Referrer-Policy' => 'strict-origin-when-cross-origin',
		);
		if (!empty($user->data['is_bot']))
		{
			// Let reverse proxies know we detected a bot.
			$http_headers['X-PHPBB-IS-BOT'] = 'yes';
		}
	}

	/**
	* Execute code and/or overwrite _common_ template variables after they have been assigned.
	*
	* @event core.page_header_after
	* @var	string	page_title			Page title
	* @var	bool	display_online_list		Do we display online users list
	* @var	string	item				Restrict online users to a certain
	*									session item, e.g. forum for
	*									session_forum_id
	* @var	int		item_id				Restrict online users to item id
	* @var	array		http_headers			HTTP headers that should be set by phpbb
	*
	* @since 3.1.0-b3
	*/
	$vars = array('page_title', 'display_online_list', 'item_id', 'item', 'http_headers');
	extract($phpbb_dispatcher->trigger_event('core.page_header_after', compact($vars)));

	foreach ($http_headers as $hname => $hval)
	{
		header((string) $hname . ': ' . (string) $hval);
	}

	return;
}

/**
* Check and display the SQL report if requested.
*
* @param \phpbb\request\request_interface		$request	Request object
* @param \phpbb\auth\auth						$auth		Auth object
* @param \phpbb\db\driver\driver_interface		$db			Database connection
 *
 * @deprecated 3.3.1 (To be removed: 4.0.0-a1); use controller helper's display_sql_report()
*/
function phpbb_check_and_display_sql_report(\phpbb\request\request_interface $request, \phpbb\auth\auth $auth, \phpbb\db\driver\driver_interface $db)
{
	global $phpbb_container;

	/** @var \phpbb\controller\helper $controller_helper */
	$controller_helper = $phpbb_container->get('controller.helper');

	$controller_helper->display_sql_report();
}

/**
* Generate the debug output string
*
* @param \phpbb\db\driver\driver_interface	$db			Database connection
* @param \phpbb\config\config				$config		Config object
* @param \phpbb\auth\auth					$auth		Auth object
* @param \phpbb\user						$user		User object
* @param \phpbb\event\dispatcher_interface	$phpbb_dispatcher	Event dispatcher
* @return string
*/
function phpbb_generate_debug_output(\phpbb\db\driver\driver_interface $db, \phpbb\config\config $config, \phpbb\auth\auth $auth, \phpbb\user $user, \phpbb\event\dispatcher_interface $phpbb_dispatcher)
{
	global $phpbb_container;

	$debug_info = array();

	// Output page creation time
	if ($phpbb_container->getParameter('debug.load_time'))
	{
		if (isset($GLOBALS['starttime']))
		{
			$totaltime = microtime(true) - $GLOBALS['starttime'];
			$debug_info[] = sprintf('<span title="SQL time: %.3fs / PHP time: %.3fs">Time: %.3fs</span>', $db->get_sql_time(), ($totaltime - $db->get_sql_time()), $totaltime);
		}
	}

	if ($phpbb_container->getParameter('debug.memory'))
	{
		$memory_usage = memory_get_peak_usage();
		if ($memory_usage)
		{
			$memory_usage = get_formatted_filesize($memory_usage);

			$debug_info[] = 'Peak Memory Usage: ' . $memory_usage;
		}

		$debug_info[] = 'GZIP: ' . (($config['gzip_compress'] && @extension_loaded('zlib')) ? 'On' : 'Off');

		if ($user->load)
		{
			$debug_info[] = 'Load: ' . $user->load;
		}
	}

	if ($phpbb_container->getParameter('debug.sql_explain'))
	{
		$debug_info[] = sprintf('<span title="Cached: %d">Queries: %d</span>', $db->sql_num_queries(true), $db->sql_num_queries());

		if ($auth->acl_get('a_'))
		{
			$debug_info[] = '<a href="' . build_url() . '&amp;explain=1">SQL Explain</a>';
		}
	}

	/**
	* Modify debug output information
	*
	* @event core.phpbb_generate_debug_output
	* @var	array	debug_info		Array of strings with debug information
	*
	* @since 3.1.0-RC3
	*/
	$vars = array('debug_info');
	extract($phpbb_dispatcher->trigger_event('core.phpbb_generate_debug_output', compact($vars)));

	return implode(' | ', $debug_info);
}

/**
* Generate page footer
*
* @param bool $run_cron Whether or not to run the cron
* @param bool $display_template Whether or not to display the template
* @param bool $exit_handler Whether or not to run the exit_handler()
*/
function page_footer($run_cron = true, $display_template = true, $exit_handler = true)
{
	global $phpbb_dispatcher, $phpbb_container, $template;

	// A listener can set this variable to `true` when it overrides this function
	$page_footer_override = false;

	/**
	* Execute code and/or overwrite page_footer()
	*
	* @event core.page_footer
	* @var	bool	run_cron			Shall we run cron tasks
	* @var	bool	page_footer_override	Shall we return instead of running
	*										the rest of page_footer()
	* @since 3.1.0-a1
	*/
	$vars = array('run_cron', 'page_footer_override');
	extract($phpbb_dispatcher->trigger_event('core.page_footer', compact($vars)));

	if ($page_footer_override)
	{
		return;
	}

	/** @var \phpbb\controller\helper $controller_helper */
	$controller_helper = $phpbb_container->get('controller.helper');

	$controller_helper->display_footer($run_cron);

	/**
	* Execute code and/or modify output before displaying the template.
	*
	* @event core.page_footer_after
	* @var	bool display_template	Whether or not to display the template
	* @var	bool exit_handler		Whether or not to run the exit_handler()
	*
	* @since 3.1.0-RC5
	*/
	$vars = array('display_template', 'exit_handler');
	extract($phpbb_dispatcher->trigger_event('core.page_footer_after', compact($vars)));

	if ($display_template)
	{
		$template->display('body');
	}

	garbage_collection();

	if ($exit_handler)
	{
		exit_handler();
	}
}

/**
* Closing the cache object and the database
* Cool function name, eh? We might want to add operations to it later
*/
function garbage_collection()
{
	global $cache, $db;
	global $phpbb_dispatcher;

	if (!empty($phpbb_dispatcher))
	{
		/**
		* Unload some objects, to free some memory, before we finish our task
		*
		* @event core.garbage_collection
		* @since 3.1.0-a1
		*/
		$phpbb_dispatcher->dispatch('core.garbage_collection');
	}

	// Unload cache, must be done before the DB connection if closed
	if (!empty($cache))
	{
		$cache->unload();
	}

	// Close our DB connection.
	if (!empty($db))
	{
		$db->sql_close();
	}
}

/**
* Handler for exit calls in phpBB.
* This function supports hooks.
*
* Note: This function is called after the template has been outputted.
*/
function exit_handler()
{
	global $phpbb_hook;

	if (!empty($phpbb_hook) && $phpbb_hook->call_hook(__FUNCTION__))
	{
		if ($phpbb_hook->hook_return(__FUNCTION__))
		{
			return $phpbb_hook->hook_return_result(__FUNCTION__);
		}
	}

	// As a pre-caution... some setups display a blank page if the flush() is not there.
	(ob_get_level() > 0) ? @ob_flush() : @flush();

	exit;
}

/**
* Handler for init calls in phpBB. This function is called in \phpbb\user::setup();
* This function supports hooks.
*/
function phpbb_user_session_handler()
{
	global $phpbb_hook;

	if (!empty($phpbb_hook) && $phpbb_hook->call_hook(__FUNCTION__))
	{
		if ($phpbb_hook->hook_return(__FUNCTION__))
		{
			return $phpbb_hook->hook_return_result(__FUNCTION__);
		}
	}

	return;
}

/**
* Casts a numeric string $input to an appropriate numeric type (i.e. integer or float)
*
* @param string $input		A numeric string.
*
* @return int|float			Integer $input if $input fits integer,
*							float $input otherwise.
*/
function phpbb_to_numeric($input)
{
	return ($input > PHP_INT_MAX) ? (float) $input : (int) $input;
}

/**
* Get the board contact details (e.g. for emails)
*
* @param \phpbb\config\config	$config
* @param string					$phpEx
* @return string
*/
function phpbb_get_board_contact(\phpbb\config\config $config, $phpEx)
{
	if ($config['contact_admin_form_enable'])
	{
		return generate_board_url() . '/memberlist.' . $phpEx . '?mode=contactadmin';
	}
	else
	{
		return $config['board_contact'];
	}
}

/**
* Get a clickable board contact details link
*
* @param \phpbb\config\config	$config
* @param string					$phpbb_root_path
* @param string					$phpEx
* @return string
*/
function phpbb_get_board_contact_link(\phpbb\config\config $config, $phpbb_root_path, $phpEx)
{
	if ($config['contact_admin_form_enable'] && $config['email_enable'])
	{
		return append_sid("{$phpbb_root_path}memberlist.$phpEx", 'mode=contactadmin');
	}
	else
	{
		return 'mailto:' . htmlspecialchars($config['board_contact'], ENT_COMPAT);
	}
}

/**
 * Get host name for ip
 *
 * @param string $ip IP string
 * @return string Hostname for IP in cleaned format
 */
function phpbb_get_host_for_ip(string $ip): string
{
	return utf8_htmlspecialchars(@gethostbyaddr($ip));
}