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random string generator (for passwords)

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Function for generating random strings

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  1. function rndstr($length=11, $type='a-zA-Z0-9')
  2. {
  3. 	$return = $chars = null;
  4.  
  5. 	if(strstr($type, 'a-z'))
  6. 		$chars .= 'abcdefghijklmnopqrstuvwxyz';
  7. 	if(strstr($type, 'A-Z'))
  8. 		$chars .= 'ABCDEFGHIJKLMNOPRQSTUVWXYZ';
  9. 	if(strstr($type, '0-9'))
  10. 		$chars .= '0123456789';
  11.  
  12. 	for($i = 0, $sl = strlen($chars) - 1; $i <= $length; $i++)
  13. 		$return .= $chars[rand(0, $sl)];
  14.  
  15. 	return $return;
  16. }
  17. /** **** Examples ****
  18. 	--- We need alphanumeric string 5 chars length ---
  19. 		echo rndstr(5);
  20. 	--- We need lowercase letters string 10 chars length ---
  21. 		echo rndstr(10, 'a-z');
  22. 	--- We need lower and upper case letters string 10 chars length ---
  23. 		echo rndstr(10, 'A-Za-z');
  24. 	--- We need numeric string 10 chars length ---
  25. 		echo rndstr(10, '0-9');
  26. 	--- ect.. ---
  27. **/

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