3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr = [1,2,3]; var_dump(memory_get_usage()); foreach ($arr as $k => $v) { $arr[0] = 2; } var_dump(key($arr));
Output for 7.1.0
int(347192) int(0)
Output for 7.0.0 - 7.0.14
int(347568) int(0)
Output for hhvm-3.10.0 - 3.12.0
int(2097152) int(0)
Output for 5.5.24 - 5.6.28
int(218592) int(1)
Output for 5.4.10 - 5.4.45
int(219112) int(1)
Output for 5.4.0 - 5.4.9
int(218584) int(1)
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/FsRPg on line 3
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/FsRPg on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/FsRPg on line 3
Process exited with code 255.