SimpleMachines / SMF2.1

			$ent_arr = preg_split('~(&#' . (empty($modSettings['disableEntityCheck']) ? '\d{1,7}' : '021') . ';|"|&|<|>| |.)~' . ($utf8 ? 'u' : '') . '', $ent_check($string), -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);

			return $length === null ? implode('', array_slice($ent_arr, $start)) : implode('', array_slice($ent_arr, $start, $length));

		},

		'strtolower' => $utf8 ? function($string) use ($sourcedir)

		{

			if (!function_exists('mb_strtolower'))

			{

				require_once($sourcedir . '/Subs-Charset.php');

				return utf8_strtolower($string);

			}

			return mb_strtolower($string, 'UTF-8');

		} : 'strtolower',

		'strtoupper' => $utf8 ? function($string)

		{

			global $sourcedir;

	// This function is needed to do the updateStats('subject') call.

	$smcFunc['strtolower'] = $db_character_set != 'utf8' && $txt['lang_character_set'] != 'UTF-8' ? 'strtolower' :

		function($string){

			global $sourcedir;

			if (function_exists('mb_strtolower'))

				return mb_strtolower($string, 'UTF-8');

			require_once($sourcedir . '/Subs-Charset.php');

			return utf8_strtolower($string);

		};

	$request = $smcFunc['db_query']('', '

		SELECT id_msg

	require_once($sourcedir . '/Subs.php');

	// We need this to properly hash the password for Admin

	$smcFunc['strtolower'] = $db_character_set != 'utf8' && $txt['lang_character_set'] != 'UTF-8' ? 'strtolower' : function($string) {

			global $sourcedir;

			if (function_exists('mb_strtolower'))

				return mb_strtolower($string, 'UTF-8');

			require_once($sourcedir . '/Subs-Charset.php');

			return utf8_strtolower($string);

		};

	if (!isset($_POST['username']))

		$_POST['username'] = '';