* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Console\Input; use Symfony\Component\Console\Exception\InvalidArgumentException; /** * StringInput represents an input provided as a string. * * Usage: * * $input = new StringInput('foo --bar="foobar"'); * * @author Fabien Potencier */ class StringInput extends ArgvInput { public const REGEX_UNQUOTED_STRING = '([^\s\\\\]+?)'; public const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'([^\'\\\\]*(?:\\\\.[^\'\\\\]*)*)\')'; /** * @param string $input A string representing the parameters from the CLI */ public function __construct(string $input) { parent::__construct([]); $this->setTokens($this->tokenize($input)); } /** * Tokenizes a string. * * @return list * * @throws InvalidArgumentException When unable to parse input (should never happen) */ private function tokenize(string $input): array { $tokens = []; $length = \strlen($input); $cursor = 0; $token = null; while ($cursor < $length) { if ('\\' === $input[$cursor]) { $token .= $input[++$cursor] ?? ''; ++$cursor; continue; } if (preg_match('/\s+/A', $input, $match, 0, $cursor)) { if (null !== $token) { $tokens[] = $token; $token = null; } } elseif (preg_match('/([^="\'\s]+?)(=?)('.self::REGEX_QUOTED_STRING.'+)/A', $input, $match, 0, $cursor)) { $token .= $match[1].$match[2].stripcslashes(str_replace(['"\'', '\'"', '\'\'', '""'], '', substr($match[3], 1, -1))); } elseif (preg_match('/'.self::REGEX_QUOTED_STRING.'/A', $input, $match, 0, $cursor)) { $token .= stripcslashes(substr($match[0], 1, -1)); } elseif (preg_match('/'.self::REGEX_UNQUOTED_STRING.'/A', $input, $match, 0, $cursor)) { $token .= $match[1]; } else { // should never happen throw new InvalidArgumentException(sprintf('Unable to parse input near "... %s ...".', substr($input, $cursor, 10))); } $cursor += \strlen($match[0]); } if (null !== $token) { $tokens[] = $token; } return $tokens; } }