3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function filter(){ return 1;} $ololo = 'wat?'; $filter = 'ololo'; $k = "filter()"; echo ${$k}; echo "\n"; echo $$$k;
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: filter() in /in/SHIs0 on line 8 Notice: Undefined variable: filter() in /in/SHIs0 on line 10 Notice: Undefined variable: in /in/SHIs0 on line 10
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: filter() in /in/SHIs0 on line 8 Notice: Undefined variable: filter() in /in/SHIs0 on line 10 Notice: Undefined variable: in /in/SHIs0 on line 10