3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = [1,2,3,4]; for($x = 0; x < len($a); $x++) { echo $a[$x]; }
based on F6HB5
Output for 7.2.0
Warning: Use of undefined constant x - assumed 'x' (this will throw an Error in a future version of PHP) in /in/lfYvf on line 4 Fatal error: Uncaught Error: Call to undefined function len() in /in/lfYvf:4 Stack trace: #0 {main} thrown in /in/lfYvf on line 4
Process exited with code 255.
Output for 7.0.0 - 7.1.10
Notice: Use of undefined constant x - assumed 'x' in /in/lfYvf on line 4 Fatal error: Uncaught Error: Call to undefined function len() in /in/lfYvf:4 Stack trace: #0 {main} thrown in /in/lfYvf on line 4
Process exited with code 255.
Output for 5.4.0 - 5.6.28
Notice: Use of undefined constant x - assumed 'x' in /in/lfYvf on line 4 Fatal error: Call to undefined function len() in /in/lfYvf on line 4
Process exited with code 255.
Output for 5.3.19 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/lfYvf on line 3
Process exited with code 255.