3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A {}; $a = new A(); class B {}; $b = new B(); $array = array(); for($i=0; $i<28; $i++) $array[$i] = $a; $array[0] = $array[26] = $b; $array = array_unique($array,SORT_REGULAR); print_r($array);

preferences:
75.43 ms | 402 KiB | 5 Q