function _unicode_check

Perform checks about Unicode support in PHP, and set the right settings if needed.

Because Backdrop needs 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.

Parameters

$errors: Whether to report any fatal errors with form_set_error().

Return value

array: An unindexed array with two values:

• The Unicode support level as a constant.
• A translated message explaining the current support level.

File

core/includes/unicode.inc, line 109

Provides Unicode-related conversions and operations.

Code

function _unicode_check() {
  // Ensure translations don't break during installation.
  $t = get_t();

  // Check for mbstring extension
  if (!function_exists('mb_strlen')) {
    return array(UNICODE_SINGLEBYTE, $t('Operations on Unicode strings are emulated on a best-effort basis. Install the <a href="@url">PHP mbstring extension</a> for improved Unicode support.', array('@url' => 'http://www.php.net/mbstring')));
  }

  // Check mbstring configuration
  if (ini_get('mbstring.func_overload') != 0) {
    return array(UNICODE_ERROR, $t('Multibyte string function overloading in PHP is active and must be disabled. Check the php.ini <em>mbstring.func_overload</em> setting. Please refer to the <a href="@url">PHP mbstring documentation</a> for more information.', array('@url' => 'http://www.php.net/mbstring')));
  }
  if (ini_get('mbstring.encoding_translation') != 0) {
    return array(UNICODE_ERROR, $t('Multibyte string input conversion in PHP is active and must be disabled. Check the php.ini <em>mbstring.encoding_translation</em> setting. Please refer to the <a href="@url">PHP mbstring documentation</a> for more information.', array('@url' => 'http://www.php.net/mbstring')));
  }

  // Set appropriate configuration
  mb_internal_encoding('utf-8');
  mb_language('uni');
  return array(UNICODE_MULTIBYTE, '');
}