3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php // Everything you enter here will be executed by our servers. Try it! function func(&$r) { $r++; } $r = 1; func(func($r)); echo $r;
Output for 7.0.0 - 7.1.0
Notice: Only variables should be passed by reference in /in/MmV9C on line 11 2
Output for 4.3.0 - 5.0.4, 5.1.0 - 5.4.45, hhvm-3.10.0 - 3.12.0
2
Output for 5.5.0 - 5.6.21
Strict Standards: Only variables should be passed by reference in /in/MmV9C on line 11 2
Output for 5.0.5
<br /> <b>Fatal error</b>: Only variables can be passed by reference in <b>/in/MmV9C</b> on line <b>11</b><br />
Process exited with code 255.