3v4l.org

run code in 200+ php & hhvm versions
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<?php var_dump($a ?? false);
Output for hhvm-3.18.5 - 3.22.0, 7.0.0 - 7.3.0rc3
bool(false)
Output for 5.6.0 - 5.6.30
Parse error: syntax error, unexpected '?' in /in/VMJsF on line 3
Process exited with code 255.