3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo "a".(isset(true)?'b':'c');
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.21, 7.2.0 - 7.2.9
Fatal error: Cannot use isset() on the result of an expression (you can use "null !== expression" instead) in /in/FmVV4 on line 3
Process exited with code 255.
preferences:
200.31 ms | 1395 KiB | 71 Q