3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = []; $arr["test"] ?? echo "nope";
Output for 7.0.0 - 7.0.2
Parse error: syntax error, unexpected 'echo' (T_ECHO) in /in/v9pEB on line 4
Process exited with code 255.
Output for 5.5.24 - 5.5.31, 5.6.8 - 5.6.17
Parse error: syntax error, unexpected '?' in /in/v9pEB on line 4
Process exited with code 255.
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167.97 ms | 1395 KiB | 28 Q