3v4l.org

run code in 200+ php & hhvm versions
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<?php $x = NULL; $y = NULL; $z = 3; var_dump($x ?? $y ?? $z); // result will be int(3)
based on R9bSp
Output for 7.0.0 - 7.2.0
int(3)
Output for 5.3.22 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/cv5Yl on line 6
Process exited with code 255.