3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo "redefine uppercase 'TRUE': " define('TRUE', false); var_dump(TRUE); echo "redefine lowercase 'true': " define('true', false); var_dump(true);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.7
Parse error: syntax error, unexpected 'define' (T_STRING), expecting ',' or ';' in /in/scRXR on line 4
Process exited with code 255.
preferences:
171.75 ms | 1395 KiB | 36 Q