PHP在保持其位置的同时重命名对象属性

Question

How can I rename an object property without changing the order?

Example object:

$obj = new stdClass();
$obj->k1 = 'k1';
$obj->k2 = 'k2';
$obj->k3 = 'k3';
$obj->k4 = 'k4';

Example rename by creating new property:

$obj->replace = $obj->k3;
unset($obj->k3);

Result:

( k1=>k1, k2=>k2, k4=>k4, replace=>k3 )

See the problem?

Simply recreating the object property causes the order to change.

I had a similar issue with arrays and came up with this solution:

Implemented solution for arrays

function replaceKey(&$array, $find, $replace)
{
    if(array_key_exists($find, $array)){
        $keys = array_keys($array);     
        $i = 0;
        $index = false;
        foreach($array as $k => $v){
            if($find === $k){
                $index = $i;
                break;
            }
            $i++;
        }
        if ($index !== false) {
            $keys[$i] = $replace;
            $array = array_combine($keys, $array);
        }
    }        
}

Looking for something similar to this but a function that will work on objects.

Can't seem to find any documentation on object property position indexes.

Answer 1

So, readd your properties

$obj = new YourClass();
$backup = [];
foreach ($obj as $key => $value)
    {
    $backup[$key] = $value;
    unset($obj->$key);
    }
replaceKey($backup, $find, $replace);
foreach ($backup as $key => $value)
    {
    $obj->$key = $value;
    }