3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [1,2,3]; echo serialize($a); echo json_encode($a);
Output for git.master, git.master_jit, rfc.property-hooks
a:3:{i:0;i:1;i:1;i:2;i:2;i:3;}[1,2,3]

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