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Posted By

tucq88 on 08/17/12


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php random String codeigniter


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random string

 / Published in: PHP
 

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  1. function random_string($type = 'alnum', $len = 8) {
  2. 	switch($type) {
  3. 		case 'basic'	: 
  4. 			return mt_rand();
  5. 			break;
  6. 		case 'alnum'	:
  7. 		case 'numeric'	:
  8. 		case 'nozero'	:
  9. 		case 'alpha'	:
  10. 			switch ($type) {
  11. 				case 'alpha' :	
  12. 					$pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
  13. 					break;
  14. 				case 'alnum' :	
  15. 					$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
  16. 					break;
  17. 				case 'numeric' :	
  18. 					$pool = '0123456789';
  19. 					break;
  20. 				case 'nozero' :	
  21. 					$pool = '123456789';
  22. 					break;
  23. 			}
  24.  
  25. 			$str = '';
  26. 			for ($i=0; $i < $len; $i++) {
  27. 				$str .= substr($pool, mt_rand(0, strlen($pool) -1), 1);
  28. 			}
  29. 			return $str;
  30. 			break;
  31. 		case 'unique'	:
  32. 		case 'md5'		:
  33. 			return md5(uniqid(mt_rand()));
  34. 			break;
  35. 		break;
  36. 	}
  37. }

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