String.php in Zircon Profile 8.0

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vendor/phpunit/phpunit/src/Util/String.php

<?php

/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann <[e-mail]>
 *
 * 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;
  }

}

Classes

Name	Description
PHPUnit_Util_String	String helpers.