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<?php $a = null; $b = 'test'; $c = "tset"; $d = 123; $e = '123'; $f = "123"; $g = ''; $h = ""; $i = false; echo $a ?? $e;
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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
123
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected '?' in /in/1iEd1 on line 13
Process exited with code 255.

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