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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = null; $b = 'test'; $c = "tset"; $d = 123; $e = '123'; $f = "123"; $g = ''; $h = ""; $i = false; echo $a ?? $e;
based on QHiKh
Output for 7.0.0 - 7.3.0rc4
123
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/1iEd1 on line 13
Process exited with code 255.