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 - 8.0.26, 8.1.0 - 8.1.13, 8.2rc1 - rc3
array(1) { ["a"]=> array(2) { [0]=> string(2) "t1" [1]=> string(2) "t2" } }

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21.87 ms | 409 KiB | 5 Q