3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function display_result() { echo 'test;'; } $x="display"; ${$x.'_result'} ();
Output for 7.0.0 - 7.1.0
Notice: Undefined variable: display_result in /in/ZptW1 on line 7 Fatal error: Uncaught Error: Function name must be a string in /in/ZptW1:7 Stack trace: #0 {main} thrown in /in/ZptW1 on line 7
Process exited with code 255.
Output for 5.0.4 - 5.6.28, hhvm-3.10.0 - 3.12.0
Notice: Undefined variable: display_result in /in/ZptW1 on line 7 Fatal error: Function name must be a string in /in/ZptW1 on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.3
Notice: Undefined variable: display_result in /in/ZptW1 on line 7 Fatal error: Function name must be a string in /in/ZptW1 on line 7
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Notice: Undefined variable: display_result in /in/ZptW1 on line 7 Fatal error: Call to undefined function: () in /in/ZptW1 on line 7
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Notice: Undefined variable: display_result in /in/ZptW1 on line 7 Fatal error: Call to undefined function: () in /in/ZptW1 on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Notice: Undefined variable: display_result in /in/ZptW1 on line 7 Fatal error: Call to undefined function: () in /in/ZptW1 on line 7