strspn.php 954 B

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  1. <?php
  2. /**
  3. * UTF8::strspn
  4. *
  5. * @package KO7
  6. *
  7. * @copyright (c) 2007-2016 Kohana Team
  8. * @copyright (c) since 2016 Koseven Team
  9. * @copyright (c) 2005 Harry Fuecks
  10. * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
  11. */
  12. function _strspn($str, $mask, $offset = NULL, $length = NULL)
  13. {
  14. if ($str == '' OR $mask == '')
  15. return 0;
  16. if (UTF8::is_ascii($str) AND UTF8::is_ascii($mask))
  17. return ($offset === NULL) ? strspn($str, $mask) : (($length === NULL) ? strspn($str, $mask, $offset) : strspn($str, $mask, $offset, $length));
  18. if ($offset !== NULL OR $length !== NULL)
  19. {
  20. $str = UTF8::substr($str, $offset, $length);
  21. }
  22. // Escape these characters: - [ ] . : \ ^ /
  23. // The . and : are escaped to prevent possible warnings about POSIX regex elements
  24. $mask = preg_replace('#[-[\].:\\\\^/]#', '\\\\$0', $mask);
  25. preg_match('/^[^'.$mask.']+/u', $str, $matches);
  26. return isset($matches[0]) ? UTF8::strlen($matches[0]) : 0;
  27. }