array_push_after

array_push_after.php

<?php

function array_push_after(&$array, $key, array $value)
{
    $keys = array_keys($array);
    $_keyPosition = array_search($key, $keys);
    
    // TODO: Fix indexed value

    $array = array_slice($array, 0, $_keyPosition + 1, true) + $value + array_slice($array, $_keyPosition, count($array) - $_keyPosition, true);
}