public static function Unicode::check

public static Unicode::check()

Checks for Unicode support in PHP and sets the proper settings if possible.

Because of the need to be able to handle text in various encodings, we do not support mbstring function overloading. HTTP input/output conversion must be disabled for similar reasons.

Return value

string A string identifier of a failed multibyte extension check, if any. Otherwise, an empty string.

File

core/lib/Drupal/Component/Utility/Unicode.php, line 145

Class

Unicode

Provides Unicode-related conversions and operations.

Namespace

Drupal\Component\Utility

Code

public static function check() {
  // Check for mbstring extension.
  if (!function_exists('mb_strlen')) {
    static::$status = static::STATUS_SINGLEBYTE;
    return 'mb_strlen';
  }

  // Check mbstring configuration.
  if (ini_get('mbstring.func_overload') != 0) {
    static::$status = static::STATUS_ERROR;
    return 'mbstring.func_overload';
  }
  if (ini_get('mbstring.encoding_translation') != 0) {
    static::$status = static::STATUS_ERROR;
    return 'mbstring.encoding_translation';
  }
  // mbstring.http_input and mbstring.http_output are deprecated and empty by
  // default in PHP 5.6.
  if (version_compare(PHP_VERSION, '5.6.0') == -1) {
    if (ini_get('mbstring.http_input') != 'pass') {
      static::$status = static::STATUS_ERROR;
      return 'mbstring.http_input';
    }
    if (ini_get('mbstring.http_output') != 'pass') {
      static::$status = static::STATUS_ERROR;
      return 'mbstring.http_output';
    }
  }

  // Set appropriate configuration.
  mb_internal_encoding('utf-8');
  mb_language('uni');
  static::$status = static::STATUS_MULTIBYTE;
  return '';
}