3v4l.org

run code in 300+ PHP versions simultaneously
<?php $capabilities = []; $capabilities['a'][] = 't1'; $capabilities['a'][] = 't2'; var_dump($capabilities);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(1) { ["a"]=> array(2) { [0]=> string(2) "t1" [1]=> string(2) "t2" } }
preferences:
139.82 ms | 402 KiB | 121 Q