119 lines
3.7 KiB
PHP
119 lines
3.7 KiB
PHP
<?php
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/**
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* PHPUnit
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*
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* Copyright (c) 2001-2013, Sebastian Bergmann <sebastian@phpunit.de>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* * Neither the name of Sebastian Bergmann nor the names of his
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* @package PHPUnit
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* @subpackage Util
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* @author Sebastian Bergmann <sebastian@phpunit.de>
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* @copyright 2001-2013 Sebastian Bergmann <sebastian@phpunit.de>
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* @license http://www.opensource.org/licenses/BSD-3-Clause The BSD 3-Clause License
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* @link http://www.phpunit.de/
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* @since File available since Release 3.6.0
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*/
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/**
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* String helpers.
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*
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* @package PHPUnit
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* @subpackage Util
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* @author Sebastian Bergmann <sebastian@phpunit.de>
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* @copyright 2001-2013 Sebastian Bergmann <sebastian@phpunit.de>
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* @license http://www.opensource.org/licenses/BSD-3-Clause The BSD 3-Clause License
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* @link http://www.phpunit.de/
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* @since Class available since Release 3.6.0
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*/
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class PHPUnit_Util_String
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{
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/**
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* Converts a string to UTF-8 encoding.
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*
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* @param string $string
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* @return string
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*/
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public static function convertToUtf8($string)
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{
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if (!self::isUtf8($string)) {
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if (function_exists('mb_convert_encoding')) {
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$string = mb_convert_encoding($string, 'UTF-8');
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} else {
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$string = utf8_encode($string);
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}
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}
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return $string;
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}
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/**
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* Checks a string for UTF-8 encoding.
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*
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* @param string $string
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* @return boolean
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*/
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protected static function isUtf8($string)
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{
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$length = strlen($string);
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for ($i = 0; $i < $length; $i++) {
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if (ord($string[$i]) < 0x80) {
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$n = 0;
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}
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else if ((ord($string[$i]) & 0xE0) == 0xC0) {
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$n = 1;
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}
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else if ((ord($string[$i]) & 0xF0) == 0xE0) {
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$n = 2;
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}
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else if ((ord($string[$i]) & 0xF0) == 0xF0) {
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$n = 3;
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}
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else {
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return FALSE;
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}
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for ($j = 0; $j < $n; $j++) {
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if ((++$i == $length) || ((ord($string[$i]) & 0xC0) != 0x80)) {
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return FALSE;
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}
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}
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}
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return TRUE;
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}
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}
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