Current File : //www/varak.net/mail2.varak.net_old/libraries/Sabre/VObject/StringUtil.php
<?php
namespace Sabre\VObject;
/**
* Useful utilities for working with various strings.
*
* @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class StringUtil {
/**
* Returns true or false depending on if a string is valid UTF-8
*
* @param string $str
* @return bool
*/
static public function isUTF8($str) {
// Control characters
if (preg_match('%[\x00-\x08\x0B-\x0C\x0E\x0F]%', $str)) {
return false;
}
return (bool)preg_match('%%u', $str);
}
/**
* This method tries its best to convert the input string to UTF-8.
*
* Currently only ISO-5991-1 input and UTF-8 input is supported, but this
* may be expanded upon if we receive other examples.
*
* @param string $str
* @return string
*/
static public function convertToUTF8($str) {
$encoding = mb_detect_encoding($str , array('UTF-8','ISO-8859-1', 'WINDOWS-1252'), true);
switch($encoding) {
case 'ISO-8859-1' :
$newStr = utf8_encode($str);
break;
/* Unreachable code. Not sure yet how we can improve this
* situation.
case 'WINDOWS-1252' :
$newStr = iconv('cp1252', 'UTF-8', $str);
break;
*/
default :
$newStr = $str;
}
// Removing any control characters
return (preg_replace('%(?:[\x00-\x08\x0B-\x0C\x0E-\x1F\x7F])%', '', $newStr));
}
}
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