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  1. <?php
  2. $str="abcdefghijklmnopqrstuvwxyz";
  3. $length=strlen($str);
  4. $ret = "";
  5. $n=5;
  6. $n=$n-1;
  7. for($i = 0, $l = strlen($str); $i < $l; ++$i)
  8. {
  9. $c = ord($str[$i]);
  10. if (97 <= $c && $c < 123) {
  11. $ret.= chr(($c + $n + 7) % 26 + 97);
  12. } else if(65 <= $c && $c < 91) {
  13. $ret.= chr(($c + $n + 13) % 26 + 65);
  14. } else {
  15. $ret.= $str[$i];
  16. }
  17. }
  18. echo $ret;
  19. ?>
Success #stdin #stdout 0.01s 20568KB
stdin
Standard input is empty
stdout
efghijklmnopqrstuvwxyzabcd