3v4l.org

run code in 300+ PHP versions simultaneously
<?php $list = ['item1','item2','item3','item4','item5','item6']; var_export( array_map(fn($row) => array_merge([999999], $row), array_chunk($list, 2)) );
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array ( 0 => array ( 0 => 999999, 1 => 'item1', 2 => 'item2', ), 1 => array ( 0 => 999999, 1 => 'item3', 2 => 'item4', ), 2 => array ( 0 => 999999, 1 => 'item5', 2 => 'item6', ), )
preferences:
106.22 ms | 407 KiB | 5 Q