3v4l.org

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<?php $string = Null; $alpha = $string ?? 'No Input'; $left = -15; $right = -30; echo $left <=> $right; echo '\n'; echo $alpha;
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
1\nNo Input
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected '?' in /in/DtG1V on line 3
Process exited with code 255.

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195.66 ms | 401 KiB | 326 Q