3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function f($x) { echo $x; } $funs = array(); for ($i=0; $i<10; $i++) { $funs[] = f($i); } for ($i=0; $i<10; $i++) { $f = $funs[$i]; $f(); }
Output for 7.0.0 - 7.3.0rc4
0123456789 Fatal error: Uncaught Error: Function name must be a string in /in/92rkC:14 Stack trace: #0 {main} thrown in /in/92rkC on line 14
Process exited with code 255.
Output for 5.0.0 - 5.6.28
0123456789 Fatal error: Function name must be a string in /in/92rkC on line 14
Process exited with code 255.
Output for 4.4.5 - 4.4.9
0123456789 Fatal error: Call to undefined function: () in /in/92rkC on line 14
Process exited with code 255.
Output for 4.3.2 - 4.4.4
0123456789 Fatal error: Call to undefined function: () in /in/92rkC on line 14
Process exited with code 255.
Output for 4.3.0 - 4.3.1
0123456789 Fatal error: Call to undefined function: () in /in/92rkC on line 14