public static function Kernel::stripComments

Removes comments from a PHP source string.

We don't use the PHP php_strip_whitespace() function as we want the content to be readable and well-formatted.

Parameters

string $source A PHP string:

Return value

string The PHP string with the comments removed

File

drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Kernel.php, line 754

Class

Kernel

The Kernel is the heart of the Symfony system.

Namespace

Code

public static function stripComments($source) {
  if (!function_exists('token_get_all')) {
    return $source;
  }
  $rawChunk = '';
  $output = '';
  $tokens = token_get_all($source);
  for (reset($tokens); false !== ($token = current($tokens)); next($tokens)) {
    if (is_string($token)) {
      $rawChunk .= $token;
    }
    elseif (T_START_HEREDOC === $token[0]) {
      $output .= preg_replace(array(
        '/\\s+$/Sm',
        '/\\n+/S',
      ), "\n", $rawChunk) . $token[1];
      do {
        $token = next($tokens);
        $output .= $token[1];
      } while ($token[0] !== T_END_HEREDOC);
      $rawChunk = '';
    }
    elseif (!in_array($token[0], array(
      T_COMMENT,
      T_DOC_COMMENT,
    ))) {
      $rawChunk .= $token[1];
    }
  }

  // replace multiple new lines with a single newline
  $output .= preg_replace(array(
    '/\\s+$/Sm',
    '/\\n+/S',
  ), "\n", $rawChunk);
  return $output;
}