function array_swap_assoc($key1, $key2, $array) {
  $newArray = array ();
  foreach ($array as $key => $value) {
    if ($key == $key1) {
      $newArray[$key2] = $array[$key2];
    } elseif ($key == $key2) {
      $newArray[$key1] = $array[$key1];
    } else {
      $newArray[$key] = $value;
    }
  }
  return $newArray;
}

<?php
  $temp = array('a' => 'A', 'b' => 'B');
  $temp = array_swap_assoc('a', 'b', $temp);
  print_r($temp);

  // $temp => array('b' => 'B', 'a' => 'A');
?>

3 thoughts on “PHP – Swap Array Elements By Array Keys”

1. Shouldn’t it be $newArray[$key] = $array[$key2]; ?

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   1. Depends on what you want to end up with, in this example, it doesn’t change the key value pair but just swap their positions.

      Your comment will result in

      $temp => array('a' => 'B', 'b' => 'A');
      

      is that what u want to do?

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      Reply

2. wtf? foreach?
   

   function array_swap_assoc($key1, $key2, $array) {
       if (isset($array[$key1], $array[$key2]))
       {
           $temp = $array[$key1];
           
           $array[$key1] = $array[$key2];
           $array[$key2] = $temp;
       }
       
       return $array;
   }
   

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