<?php
  
  /*
   * This file is part of the Symfony package.
   *
   * (c) Fabien Potencier <fabien@symfony.com>
   *
   * For the full copyright and license information, please view the LICENSE
   * file that was distributed with this source code.
   */
  
  namespace Symfony\Component\Process;
  
  /**
   * ProcessUtils is a bunch of utility methods.
   *
   * This class contains static methods only and is not meant to be instantiated.
   *
   * @author Martin Hasoň <martin.hason@gmail.com>
   */
  class ProcessUtils
  {
      /**
       * This class should not be instantiated
       */
      private function __construct()
      {
      }
  
      /**
       * Escapes a string to be used as a shell argument.
       *
       * @param string $argument The argument that will be escaped
       *
       * @return string The escaped argument
       */
      public static function escapeArgument($argument)
      {
          //Fix for PHP bug #43784 escapeshellarg removes % from given string
          //Fix for PHP bug #49446 escapeshellarg doesn't work on Windows
          //@see https://bugs.php.net/bug.php?id=43784
          //@see https://bugs.php.net/bug.php?id=49446
          if (defined('PHP_WINDOWS_VERSION_BUILD')) {
              if ('' === $argument) {
                  return escapeshellarg($argument);
              }
  
              $escapedArgument = '';
              foreach (preg_split('/([%"])/i', $argument, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE) as $part) {
                  if ('"' === $part) {
                      $escapedArgument .= '\\"';
                  } elseif ('%' === $part) {
                      $escapedArgument .= '^%';
                  } else {
                      $escapedArgument .= escapeshellarg($part);
                  }
              }
  
              return $escapedArgument;
          }
  
          return escapeshellarg($argument);
      }
  }