3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(11, 22, 33, 44); var_dump(array_shift(array_filter(array(null, 'aaa', 111, 33))));
Output for 7.0.0 - 7.1.0
Notice: Only variables should be passed by reference in /in/DCJhG on line 4 string(3) "aaa"
Output for 5.1.0 - 5.6.28
Strict Standards: Only variables should be passed by reference in /in/DCJhG on line 4 string(3) "aaa"
Output for 5.0.5
Fatal error: Only variables can be passed by reference in /in/DCJhG on line 4
Process exited with code 255.
Output for 4.3.0 - 5.0.4
string(3) "aaa"