3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo concat(a3c65c2974270fd093ee8a9bf8ae7d0b a0a080f42e6f13b3a2df133f073095dd 698d51a19d8a121ce581499d7b701668,CAPTCHA=V2EX); ?>
Output for 7.0.0
Parse error: syntax error, unexpected 'a0a080f42e6f13b3a2df133f073095' (T_STRING), expecting ',' or ')' in /in/g7oKP on line 4
Process exited with code 255.
Output for 5.5.24 - 5.5.30, 5.6.8 - 5.6.16
Parse error: syntax error, unexpected 'a0a080f42e6f13b3a2df133f073095' (T_STRING) in /in/g7oKP on line 4
Process exited with code 255.
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166.16 ms | 1395 KiB | 24 Q