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   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\Console\Input;
  13  
  14  use Symfony\Component\Console\Exception\InvalidArgumentException;
  15  
  16  /**
  17   * StringInput represents an input provided as a string.
  18   *
  19   * Usage:
  20   *
  21   *     $input = new StringInput('foo --bar="foobar"');
  22   *
  23   * @author Fabien Potencier <fabien@symfony.com>
  24   */
  25  class StringInput extends ArgvInput
  26  {
  27      const REGEX_STRING = '([^\s]+?)(?:\s|(?<!\\\\)"|(?<!\\\\)\'|$)';
  28      const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'([^\'\\\\]*(?:\\\\.[^\'\\\\]*)*)\')';
  29  
  30      /**
  31       * @param string $input A string representing the parameters from the CLI
  32       */
  33      public function __construct($input)
  34      {
  35          parent::__construct([]);
  36  
  37          $this->setTokens($this->tokenize($input));
  38      }
  39  
  40      /**
  41       * Tokenizes a string.
  42       *
  43       * @param string $input The input to tokenize
  44       *
  45       * @return array An array of tokens
  46       *
  47       * @throws InvalidArgumentException When unable to parse input (should never happen)
  48       */
  49      private function tokenize($input)
  50      {
  51          $tokens = [];
  52          $length = \strlen($input);
  53          $cursor = 0;
  54          while ($cursor < $length) {
  55              if (preg_match('/\s+/A', $input, $match, null, $cursor)) {
  56              } elseif (preg_match('/([^="\'\s]+?)(=?)('.self::REGEX_QUOTED_STRING.'+)/A', $input, $match, null, $cursor)) {
  57                  $tokens[] = $match[1].$match[2].stripcslashes(str_replace(['"\'', '\'"', '\'\'', '""'], '', substr($match[3], 1, \strlen($match[3]) - 2)));
  58              } elseif (preg_match('/'.self::REGEX_QUOTED_STRING.'/A', $input, $match, null, $cursor)) {
  59                  $tokens[] = stripcslashes(substr($match[0], 1, \strlen($match[0]) - 2));
  60              } elseif (preg_match('/'.self::REGEX_STRING.'/A', $input, $match, null, $cursor)) {
  61                  $tokens[] = stripcslashes($match[1]);
  62              } else {
  63                  // should never happen
  64                  throw new InvalidArgumentException(sprintf('Unable to parse input near "... %s ...".', substr($input, $cursor, 10)));
  65              }
  66  
  67              $cursor += \strlen($match[0]);
  68          }
  69  
  70          return $tokens;
  71      }
  72  }