3v4l.org

run code in 300+ PHP versions simultaneously
<?php // This produces errors $a = $x ? $x : $y; // This desn't produce errors (only PHP 7) $aa = $xx ?? $yy;
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $x in /in/G56Sa on line 4 Warning: Undefined variable $y in /in/G56Sa on line 4 Warning: Undefined variable $yy in /in/G56Sa on line 7

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