public static function Unicode::encodingFromBOM in Plug 7

Decodes UTF byte-order mark (BOM) into the encoding's name.

Parameters

string $data: The data possibly containing a BOM. This can be the entire contents of a file, or just a fragment containing at least the first five bytes.

Return value

string|bool The name of the encoding, or FALSE if no byte order mark was present.

File

lib/Drupal/Component/Utility/Unicode.php, line 196

Contains \Drupal\Component\Utility\Unicode.

Class

Unicode

Provides Unicode-related conversions and operations.

Namespace

Drupal\Component\Utility

Code

public static function encodingFromBOM($data) {
  static $bomMap = array(
    "" => 'UTF-8',
    "" => 'UTF-16BE',
    "" => 'UTF-16LE',
    "" => 'UTF-32BE',
    "" => 'UTF-32LE',
    "+/v8" => 'UTF-7',
    "+/v9" => 'UTF-7',
    "+/v+" => 'UTF-7',
    "+/v/" => 'UTF-7',
    "+/v8-" => 'UTF-7',
  );
  foreach ($bomMap as $bom => $encoding) {
    if (strpos($data, $bom) === 0) {
      return $encoding;
    }
  }
  return FALSE;
}