3v4l.org

run code in 300+ PHP versions simultaneously
<?php define('exit', '123'); echo \exit, "\n"; echo "still running...\n"; echo exit, "\n"; echo "no more running.";
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
123 still running...
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Parse error: syntax error, unexpected 'exit' (T_EXIT), expecting identifier (T_STRING) in /in/aBq2R on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_EXIT, expecting T_STRING in /in/aBq2R on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/aBq2R on line 5
preferences:
200.05 ms | 402 KiB | 470 Q