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<?php $c = 'c'; echo $a ?? 'b'."\n"; echo $a ?? $b ?? $c ?? : 'd';
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.29, 5.6.8 - 5.6.13
Parse error: syntax error, unexpected '?' in /in/oRUQV on line 4
Process exited with code 255.

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185.25 ms | 1400 KiB | 62 Q