3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo isset(0);
Output for 5.5.0 - 5.6.28, 7.0.0 - 7.0.13
Fatal error: Cannot use isset() on the result of an expression (you can use "null !== expression" instead) in /in/49XsN on line 3
Process exited with code 255.
Output for hhvm-3.10.0 - 3.13.2
1
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '0' (T_LNUMBER) in /in/49XsN on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_LNUMBER in /in/49XsN on line 3
Process exited with code 255.