3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $x = array(); $x[] = 5; echo $x[0]; $x[] = 6; echo len($x);
based on NiBmE
Output for 7.0.0 - 7.2.0
5 Fatal error: Uncaught Error: Call to undefined function len() in /in/IemMh:7 Stack trace: #0 {main} thrown in /in/IemMh on line 7
Process exited with code 255.
Output for 5.3.19 - 5.6.28
5 Fatal error: Call to undefined function len() in /in/IemMh on line 7
Process exited with code 255.