3v4l.org

run code in 500+ PHP versions simultaneously
<?php $color = [ ['id' => 1, 'color' => 'red'], ['id' => 2, 'color' => 'green'], ['id' => 3, 'color' => 'blue'], ]; $size = [ ['id' => 1, 'size' => 'SM'], ['id' => 2, 'size' => 'XL'], ['id' => 4, 'size' => 'LG'], ['id' => 3, 'size' => 'MD'], ]; foreach(array_merge($color, $size) as $el){ $merged[$el['id']] = ($merged[$el['id']] ?? []) + $el; } var_export($merged);
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array ( 1 => array ( 'id' => 1, 'color' => 'red', 'size' => 'SM', ), 2 => array ( 'id' => 2, 'color' => 'green', 'size' => 'XL', ), 3 => array ( 'id' => 3, 'color' => 'blue', 'size' => 'MD', ), 4 => array ( 'id' => 4, 'size' => 'LG', ), )
preferences:
105.76 ms | 1591 KiB | 4 Q