3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = [1, 2, 3, 4, 5]; foreach($a as $k => &$v) { var_dump($v); unset($a[$k]); var_dump($v); $v .= '-m'; var_dump($v); } var_dump($a);
based on OAvkq
Output for 5.4.0 - 7.1.0
int(1) int(1) string(3) "1-m" int(2) int(2) string(3) "2-m" int(3) int(3) string(3) "3-m" int(4) int(4) string(3) "4-m" int(5) int(5) string(3) "5-m" array(0) { }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/lV2AB 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/lV2AB on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/lV2AB on line 3
Process exited with code 255.