3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function a() { return 'a'; } echo ${a()}();
Output for 7.0.0 - 7.1.0
Notice: Undefined variable: a in /in/kagYi on line 8 Fatal error: Uncaught Error: Function name must be a string in /in/kagYi:8 Stack trace: #0 {main} thrown in /in/kagYi on line 8
Process exited with code 255.
Output for 5.0.4 - 5.6.28
Notice: Undefined variable: a in /in/kagYi on line 8 Fatal error: Function name must be a string in /in/kagYi on line 8
Process exited with code 255.
Output for 5.0.0 - 5.0.3
Notice: Undefined variable: a in /in/kagYi on line 8 Fatal error: Function name must be a string in /in/kagYi on line 8
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Notice: Undefined variable: a in /in/kagYi on line 8 Fatal error: Call to undefined function: () in /in/kagYi on line 8
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Notice: Undefined variable: a in /in/kagYi on line 8 Fatal error: Call to undefined function: () in /in/kagYi on line 8
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Notice: Undefined variable: a in /in/kagYi on line 8 Fatal error: Call to undefined function: () in /in/kagYi on line 8