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run code in 300+ PHP versions simultaneously
<?php error_reporting(-1); $b['hi'] = 1; if(($a['hello'] ?? $b['hi'] ?? $c['hello'] ?? 1) === 1) { echo '2'; }
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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
2
Output for 5.4.1 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/TIb8u on line 4
Process exited with code 255.

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212.18 ms | 402 KiB | 253 Q