3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a=array("red","green"); array_push("blue",$a,"yellow"); print_r($a); ?>
based on Clk5o
Output for 5.6.0 - 5.6.30, 7.0.0 - 7.1.6
Fatal error: Only variables can be passed by reference in /in/gdYco on line 3
Process exited with code 255.
Output for hhvm-3.15.4
Fatal error: Uncaught Error: Only variables can be passed by reference in /in/gdYco:3 Stack trace: #0 {main}
Process exited with code 255.