Файл: gapps/vendor/phpunit/phpunit/src/Util/String.php
Строк: 71
<?php
/*
* This file is part of PHPUnit.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* String helpers.
*
* @since Class available since Release 3.6.0
*/
class PHPUnit_Util_String
{
/**
* Converts a string to UTF-8 encoding.
*
* @param string $string
*
* @return string
*/
public static function convertToUtf8($string)
{
if (!self::isUtf8($string)) {
if (function_exists('mb_convert_encoding')) {
$string = mb_convert_encoding($string, 'UTF-8');
} else {
$string = utf8_encode($string);
}
}
return $string;
}
/**
* Checks a string for UTF-8 encoding.
*
* @param string $string
*
* @return bool
*/
protected static function isUtf8($string)
{
$length = strlen($string);
for ($i = 0; $i < $length; $i++) {
if (ord($string[$i]) < 0x80) {
$n = 0;
} elseif ((ord($string[$i]) & 0xE0) == 0xC0) {
$n = 1;
} elseif ((ord($string[$i]) & 0xF0) == 0xE0) {
$n = 2;
} elseif ((ord($string[$i]) & 0xF0) == 0xF0) {
$n = 3;
} else {
return false;
}
for ($j = 0; $j < $n; $j++) {
if ((++$i == $length) || ((ord($string[$i]) & 0xC0) != 0x80)) {
return false;
}
}
}
return true;
}
}