PHP two functions: Generate serial number, string substitution

Source: Internet
Author: User
  1. /**

  2. * Serial Number generator
  3. Func:snmaker
  4. Param: $pre = ' '
  5. */
  6. function Snmaker ($pre = ") {
  7. $date = Date (' Ymd ');
  8. $rand = rand (1000000,9999999);
  9. $time = Mb_substr (Time (), 5, 5, ' utf-8 ');
  10. $serialNumber = $pre. $date. $time. $rand;
  11. echo strlen ($serialNumber). '
    ';
  12. return $serialNumber;
  13. }
  14. Echo Snmaker ();

  15. /**

  16. * Replace a part of a string with a specific character
  17. * @param str or int $str The string to be processed
  18. * @param str or int $to will be replaced by what string
  19. * @param int $start retain the first few characters
  20. * @param int $end retain the last few characters
  21. * url:http://bbs.it-home.org
  22. * DATE:2013/2/17
  23. */
  24. function hidestring ($str = ' Hello ', $to = ' * ', $start = 1, $end = 0) {
  25. $lenth = strlen ($str)-$start-$end;
  26. $lenth = ($lenth < 0)? 0: $lenth;
  27. $to = Str_repeat ($to, $lenth);
  28. $str = Substr_replace ($str, $to, $start, $lenth);
  29. return $str;
  30. }
  31. Echo hidestring ();
  32. ?>

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