3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $var=NULL; print $is_set($var);
Output for 7.0.0 - 7.1.0RC5
Notice: Undefined variable: is_set in /in/5VF3k on line 4 Fatal error: Uncaught Error: Function name must be a string in /in/5VF3k:4 Stack trace: #0 {main} thrown in /in/5VF3k on line 4
Process exited with code 255.
Output for 5.0.4 - 5.6.21, hhvm-3.12.0
Notice: Undefined variable: is_set in /in/5VF3k on line 4 Fatal error: Function name must be a string in /in/5VF3k on line 4
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.0.3
Notice: Undefined variable: is_set in /in/5VF3k on line 4 Fatal error: Function name must be a string in /in/5VF3k on line 4
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Notice: Undefined variable: is_set in /in/5VF3k on line 4 Fatal error: Call to undefined function: () in /in/5VF3k on line 4
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Notice: Undefined variable: is_set in /in/5VF3k on line 4 Fatal error: Call to undefined function: () in /in/5VF3k on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Notice: Undefined variable: is_set in /in/5VF3k on line 4 Fatal error: Call to undefined function: () in /in/5VF3k on line 4