3v4l.org

run code in 300+ PHP versions simultaneously
<?php $baz = 'x'; $bar = null; $foo = $bar ?? $baz; var_dump($baz); var_dump($ccc);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(1) "x" Warning: Undefined variable $ccc in /in/TLIDj on line 6 NULL
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
string(1) "x" Notice: Undefined variable: ccc in /in/TLIDj on line 6 NULL
Output for 7.3.32 - 7.3.33
string(1) "x" NULL
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected '?' in /in/TLIDj on line 4
Process exited with code 255.
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248.39 ms | 402 KiB | 330 Q