array array_map ( callback callback, arrayarray1 [, array $array2...] );

<?php
   function cube(n) {
      return(n * n *n);
   }

   input = array(1, 2, 3, 4, 5);result = array_map("cube", input);

   print_r(result);
?>

Array ( [0] => 1 [1] => 8 [2] => 27 [3] => 64 [4] => 125 )

<?php
   function call_back_func(v1,v2) {
      if (v1 ===v2) {
         return "equal";
      }
      return "different";
   }

   array1 = array(1, 2, 3, 4);array2 = array(10, 2, 30, 4);
   b = array_map("call_back_func",array1, array2);

   print_r(b);

?>

Array ( [0] => different [1] => equal [2] => different [3] => equal )