public static function UTF8Utils::checkForIllegalCodepoints in Zircon Profile 8.0

Same name and namespace in other branches

1. 8 vendor/masterminds/html5/src/HTML5/Parser/UTF8Utils.php \Masterminds\HTML5\Parser\UTF8Utils::checkForIllegalCodepoints()

Checks for Unicode code points that are not valid in a document.

Parameters

string $data: A string to analyze.

Return value

array An array of (string) error messages produced by the scanning.

2 calls to UTF8Utils::checkForIllegalCodepoints()

StringInputStream::__construct in vendor/masterminds/html5/src/HTML5/Parser/StringInputStream.php

Create a new InputStream wrapper.

UTF8UtilsTest::testCheckForIllegalCodepoints in vendor/masterminds/html5/test/HTML5/Parser/UTF8UtilsTest.php

* @todo add tests for invalid codepoints

File

vendor/masterminds/html5/src/HTML5/Parser/UTF8Utils.php, line 131

Class

UTF8Utils

UTF-8 Utilities

Namespace

Masterminds\HTML5\Parser

Code

public static function checkForIllegalCodepoints($data) {
  if (!function_exists('preg_match_all')) {
    throw \Exception('The PCRE library is not loaded or is not available.');
  }

  // Vestigal error handling.
  $errors = array();

  /*
   * All U+0000 null characters in the input must be replaced by U+FFFD REPLACEMENT CHARACTERs. Any occurrences of such characters is a parse error.
   */
  for ($i = 0, $count = substr_count($data, "\0"); $i < $count; $i++) {
    $errors[] = 'null-character';
  }

  /*
   * Any occurrences of any characters in the ranges U+0001 to U+0008, U+000B, U+000E to U+001F, U+007F to U+009F, U+D800 to U+DFFF , U+FDD0 to U+FDEF, and characters U+FFFE, U+FFFF, U+1FFFE, U+1FFFF, U+2FFFE, U+2FFFF, U+3FFFE, U+3FFFF, U+4FFFE, U+4FFFF, U+5FFFE, U+5FFFF, U+6FFFE, U+6FFFF, U+7FFFE, U+7FFFF, U+8FFFE, U+8FFFF, U+9FFFE, U+9FFFF, U+AFFFE, U+AFFFF, U+BFFFE, U+BFFFF, U+CFFFE, U+CFFFF, U+DFFFE, U+DFFFF, U+EFFFE, U+EFFFF, U+FFFFE, U+FFFFF, U+10FFFE, and U+10FFFF are parse errors. (These are all control characters or permanently undefined Unicode characters.)
   */

  // Check PCRE is loaded.
  $count = preg_match_all('/(?:
        [\\x01-\\x08\\x0B\\x0E-\\x1F\\x7F] # U+0001 to U+0008, U+000B,  U+000E to U+001F and U+007F
      |
        \\xC2[\\x80-\\x9F] # U+0080 to U+009F
      |
        \\xED(?:\\xA0[\\x80-\\xFF]|[\\xA1-\\xBE][\\x00-\\xFF]|\\xBF[\\x00-\\xBF]) # U+D800 to U+DFFFF
      |
        \\xEF\\xB7[\\x90-\\xAF] # U+FDD0 to U+FDEF
      |
        \\xEF\\xBF[\\xBE\\xBF] # U+FFFE and U+FFFF
      |
        [\\xF0-\\xF4][\\x8F-\\xBF]\\xBF[\\xBE\\xBF] # U+nFFFE and U+nFFFF (1 <= n <= 10_{16})
      )/x', $data, $matches);
  for ($i = 0; $i < $count; $i++) {
    $errors[] = 'invalid-codepoint';
  }
  return $errors;
}