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   1  <?php
   2  	function strToIntArray($string){
   3          $arr = array();
   4          for($i=0, $n=strlen($string);$i<$n;$i++){
   5              $arr[]= ord(substr($string, $i, 1));
   6          }
   7          return $arr;
   8      }
   9      
  10  	function charAt($str, $i){
  11          return ord(substr($str, $i, 1));
  12      }
  13  ?>