3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $r = array(); $r[] = 'a'; echo "" + $r;
Output for 7.1.0
Warning: A non-numeric value encountered in /in/Yc0jH on line 7 Fatal error: Uncaught Error: Unsupported operand types in /in/Yc0jH:7 Stack trace: #0 {main} thrown in /in/Yc0jH on line 7
Process exited with code 255.
Output for 7.0.0 - 7.0.14
Fatal error: Uncaught Error: Unsupported operand types in /in/Yc0jH:7 Stack trace: #0 {main} thrown in /in/Yc0jH on line 7
Process exited with code 255.
Output for hhvm-3.10.0 - 3.12.0
Fatal error: Invalid operand type was used: cannot perform this operation with arrays in /in/Yc0jH on line 7
Process exited with code 255.
Output for 4.3.2 - 5.6.28
Fatal error: Unsupported operand types in /in/Yc0jH on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Unsupported operand types in /in/Yc0jH on line 7