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PHP random string generation function

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Release： 2016-07-25 08:51:21
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  2. function random_string($length, $max=FALSE)
  3. {
  4. if (is_int($max) && $max > $length)
  5. {
  6. $length = mt_rand($length, $max);
  7. }
  8. $output = '';
  10. for ($i=0; $i<$length; $i++)
  11. {
  12. $which = mt_rand(0,2);
  14. if ($which === 0)
  15. {
  16. $output .= mt_rand(0,9);
  17. }
  18. elseif ($which === 1)
  19. {
  20. $output .= chr(mt_rand(65,90));
  21. }
  22. else
  23. {
  24. $output .= chr(mt_rand(97,122));
  25. }
  26. }
  27. return $output;
  28. }
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Related labels：
PHP随机字符串生成函数
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