public static function Variable::export

public static Variable::export($var, $prefix = '')

Drupal-friendly var_export().

Parameters

mixed $var: The variable to export.

string $prefix: A prefix that will be added at the beginning of every lines of the output.

Return value

string The variable exported in a way compatible to Drupal's coding standards.

File

core/lib/Drupal/Component/Utility/Variable.php, line 23

Class

Variable

Provides helpers for dealing with variables.

Namespace

Drupal\Component\Utility

Code

public static function export($var, $prefix = '') {
  if (is_array($var)) {
    if (empty($var)) {
      $output = 'array()';
    }
    else {
      $output = "array(\n";
      // Don't export keys if the array is non associative.
      $export_keys = array_values($var) != $var;
      foreach ($var as $key => $value) {
        $output .= '  ' . ($export_keys ? static::export($key) . ' => ' : '') . static::export($value, '  ', FALSE) . ",\n";
      }
      $output .= ')';
    }
  }
  elseif (is_bool($var)) {
    $output = $var ? 'TRUE' : 'FALSE';
  }
  elseif (is_string($var)) {
    if (strpos($var, "\n") !== FALSE || strpos($var, "'") !== FALSE) {
      // If the string contains a line break or a single quote, use the
      // double quote export mode. Encode backslash, dollar symbols, and
      // double quotes and transform some common control characters.
      $var = str_replace(array('\\', '$', '"', "\n", "\r", "\t"), array('\\\\', '\$', '\"', '\n', '\r', '\t'), $var);
      $output = '"' . $var . '"';
    }
    else {
      $output = "'" . $var . "'";
    }
  }
  elseif (is_object($var) && get_class($var) === 'stdClass') {
    // var_export() will export stdClass objects using an undefined
    // magic method __set_state() leaving the export broken. This
    // workaround avoids this by casting the object as an array for
    // export and casting it back to an object when evaluated.
    $output = '(object) ' . static::export((array) $var, $prefix);
  }
  else {
    $output = var_export($var, TRUE);
  }

  if ($prefix) {
    $output = str_replace("\n", "\n$prefix", $output);
  }

  return $output;
}