public static function Unicode::encodingFromBOM in Drupal 9

Same name and namespace in other branches

8 core/lib/Drupal/Component/Utility/Unicode.php \Drupal\Component\Utility\Unicode::encodingFromBOM()

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.

2 calls to Unicode::encodingFromBOM()

CssOptimizer::loadFile in core/lib/Drupal/Core/Asset/CssOptimizer.php: Loads the stylesheet and resolves all @import commands.
JsOptimizer::optimize in core/lib/Drupal/Core/Asset/JsOptimizer.php: Optimizes an asset.

File

core/lib/Drupal/Component/Utility/Unicode.php, line 155

Class

Unicode: Provides Unicode-related conversions and operations.

Namespace

Drupal\Component\Utility

Code

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

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