StringUtil.php

Go to the documentation of this file.

<?php
 
namespace Sabre\VObject;
 
class StringUtil {
 
    static function isUTF8($str) {
 
        // Control characters
        if (preg_match('%[\x00-\x08\x0B-\x0C\x0E\x0F]%', $str)) {
            return false;
        }
 
        return (bool)preg_match('%%u', $str);
 
    }
 
    static function convertToUTF8($str) {
 
        $encoding = mb_detect_encoding($str, ['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));
 
    }
 
}