3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(null ?? 'foo'); var_dump(false ?? 'foo'); var_dump('' ?? 'foo'); var_dump(' ' ?? 'foo'); var_dump(0 ?? 'foo'); var_dump([] ?? 'foo');
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
string(3) "foo" bool(false) string(0) "" string(1) " " int(0) array(0) { }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/jphnq on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '?' in /in/jphnq on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/jphnq on line 2
Process exited with code 255.
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158.54 ms | 409 KiB | 5 Q