3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $array = [0, 1, 2]; while (each($array)) { var_dump(key($array)); } reset($array); echo "----\n"; foreach ($array as $elem) { var_dump(key($array)); } reset($array); echo "----\n"; $array2 = &$array; foreach ($array2 as $elem) { var_dump(key($array)); }
Output for 7.0.0 - 7.1.0
int(1) int(2) NULL ---- int(0) int(0) int(0) ---- int(0) int(0) int(0)
Output for 5.4.0 - 5.6.28
int(1) int(2) NULL ---- int(1) int(1) int(1) ---- int(1) int(2) NULL
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/36Ni5 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/36Ni5 on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/36Ni5 on line 2
Process exited with code 255.