3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = [0,1,2]; foreach ($x as $k => &$v) { print $k; if ($k == 0) { unset($x[1]); } foreach ($x as $y) { } } echo "\n"; $a = [0,1,2]; foreach ($a as $k1 => $v1) { print $k1; if ($k1 == 0) { unset($a[1]); } foreach ($a as $b) { } }
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
02 012
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
0 012
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/Pe1PP on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/Pe1PP on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/Pe1PP on line 3
Process exited with code 255.
preferences:
286.67 ms | 401 KiB | 460 Q