3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = [1,100 => 2,100]; echo "{count($a)}"; $a[100]++; print_r($a);
based on j8Mmb
Output for 5.4.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Notice: Array to string conversion in /in/EhsOX on line 3 {count(Array)}Array ( [0] => 1 [100] => 3 [101] => 100 )
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/EhsOX on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/EhsOX on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/EhsOX on line 2
Process exited with code 255.