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URL Shortener Generator.

/ Published in: PHP
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  1. function str_inc($str, $pos = 0)
  2. {
  3. 	$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_';
  4. 	$charsmax = strlen($chars);
  5. 	$len = strlen($str);
  6. 	if($len == 0)
  7. 	{
  8. 		return $chars[0];
  9. 	}
  10. 	$strindex = $len - $pos - 1;
  11. 	if($strindex < 0)
  12. 	{
  13. 		return $chars[0] . $str;
  14. 	}
  15. 	$char = $str[$strindex];
  16. 	$charsindex = strpos($chars, $char);
  17. 	if($charsindex == $charsmax)
  18. 	{
  19. 		$str[$strindex] = $chars[0];
  20. 		return str_inc($str, $pos + 1);
  21. 	}else{
  22. 		$str[$strindex] = $chars[$charsindex + 1];
  23. 		return $str;
  24. 	}
  25. }

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