Question

Have an array

   $A = 
      Array
      (
     [0] => Array ([0] => aaa)

     [1] => Array([0] => bbb)

     [2] => Array([1] => ccc)

     [3] => Array([1] => ddd)
    )




   $B = array();
    chang_arr($A){

    //TODO  


    }

will got an array $B like this

    Array
    (
 [0] => Array ([0] => aaa
        [1] => bbb
      )
 [1] => Array([0] => ccc
      [1] => ddd
      )
    )

Answer 1

function chang_arr($A){ 
   $B = array();
   foreach($A as $ar) {
      foreach($ar as $k => $v) {
         $B[$k][] = $v
      }
   }
   return $B;
}

$B = chang_arr($A);