Question

Example: my current result set:

array(7) {[0]=>array(2) 

{ ["class_id"]=>string(1) "1"["class"]=>string(3)"1st"}

{ ["class_id"]=>string(1) "2"["class"]=>string(3)"2nd"}

{ ["class_id"]=>string(1) "3"["class"]=>string(3)"3rd"}

I want a new result set as :

array(7) {[0]=>array(2) 

{ ["new_id"]=>string(1) "1"["new_class"]=>string(3)"1st"}

{ ["new_id"]=>string(1) "2"["new_class"]=>string(3)"2nd"}

{ ["new_id"]=>string(1) "3"["new_class"]=>string(3)"3rd"}

I dont want this to affect the column names in my database. only the result set.

Answer 1

try this

function rename_key(&$array, $oldkey, $newkey) {
// remember here we send value by reference using `&`
    if(array_key_exists($oldkey,$array))
    {
        $array[$newkey] = &$array[$oldkey];
        unset($array[$oldkey]);
    }
    return $array;
}

foreach($input as $k)
{
    rename_key($k, 'class_id', 'new_id');
    rename_key($k, 'class', 'new_class');
    $output[]=$k;
}
echo "<pre>";
print_r ($output);