3v4l.org

run code in 300+ PHP versions simultaneously
<?php $result = []; foreach (range('a', 'e') as $value) { if ($result) { $row[] = $value; unset($row); } $row = [$value]; $result[] = &$row; } var_export($result);
Output for 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 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
array ( 0 => array ( 0 => 'a', 1 => 'b', ), 1 => array ( 0 => 'b', 1 => 'c', ), 2 => array ( 0 => 'c', 1 => 'd', ), 3 => array ( 0 => 'd', 1 => 'e', ), 4 => array ( 0 => 'e', ), )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array ( 0 => array ( 0 => 'a', 1 => 'b', ), 1 => array ( 0 => 'b', 1 => 'c', ), 2 => array ( 0 => 'c', 1 => 'd', ), 3 => array ( 0 => 'd', 1 => 'e', ), 4 => array ( 0 => 'e', ), )
preferences:
116.88 ms | 402 KiB | 158 Q