<?php
/**
* __ _ ___ ___ ___ ___ ___ ____ _ __ ___ ___
* / _` |/ / / __/ _ \ / _ \ / / / __/| '_ ` _ \ / /
* | (_| |\ \| (_| (_) | (_) |\ \ | (__ | | | | | |\ \
* \__,_|/__/ \___\___/ \___/ /__/ \___\|_| |_| |_|/__/
*
*
*************************************************************************************
* @ASCOOS-NAME : ASCOOS CMS 24' *
* @ASCOOS-VERSION : 24.0.0 *
* @ASCOOS-CATEGORY : Kernel (Frontend and Administration Side) *
* @ASCOOS-CREATOR : Drogidis Christos *
* @ASCOOS-SITE : www.ascoos.com *
* @ASCOOS-LICENSE : [Commercial] http://docs.ascoos.com/lics/ascoos/AGL-F.html *
* @ASCOOS-COPYRIGHT : Copyright (c) 2007 - 2023, AlexSoft Software. *
*************************************************************************************
*
* @package : ASCOOS CMS - phpBCL
* @subpackage : phpBCL Native Functions
* @source : /phpBCL/src/phpBCL.php
* @version : 1.1.3
* @created : 2024-02-20 05:40:00 UTC+3
* @updated : 2024-10-22 07:00:00 UTC+3
* @author : Drogidis Christos
* @authorSite : www.alexsoft.gr
*/
/**
* Validate string encoding.
*
* @param string|null $encoding The encoding parameter is the character encoding.
* @param string $owner Optionally, the owner function. Used for return error messages.
*
* @return string The character encoding.
*
* @author : Drogidis Christos
* @authorSite : www.alexsoft.gr
* @since 1.0.5
*/
function validate_encoding($encoding=null, $owner='validate_encoding') {
// If $encoding is empty then we take the default internal encoding, otherwise we use the one given by the user.
$encoding = (is_null($encoding)) ? $encoding = mb_internal_encoding() : (string) $encoding;
/**
* Array with Strings Errors for this function.
*/
$errors = array (
''.$owner.'(): expects parameter 1 to be string, '.gettype($encoding).' given',
''.$owner.'(): Unknown encoding "'.$encoding.'"'
);
if (!is_string($encoding) && !is_null($encoding)) {
trigger_error($errors[0], E_USER_WARNING);
return '';
}
if (!in_array($encoding, mb_list_encodings(), true)) {
static $aliases;
if ($aliases === null) {
$aliases = [];
foreach (mb_list_encodings() as $encoding) {
$encoding_aliases = mb_encoding_aliases($encoding);
if ($encoding_aliases) {
foreach ($encoding_aliases as $alias) {
$aliases[] = $alias;
}
}
}
}
if (!in_array($encoding, $aliases, true)) {
trigger_error($errors[1], E_USER_WARNING);
return '';
}
}
return (string) $encoding;
}
/**
* Quote regular expression characters.
*
* @param string $char The input char.
* @return string the quoted (escaped) string.
*
* @author : Drogidis Christos
* @authorSite : www.alexsoft.gr
* @since 1.0.7
*/
function alf_preg_quote($char) {
return preg_quote($char, '/');
}
?>
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