Simple example of grouping PHP arrays

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<?php $teams =array (1,2,3,4,5,6,7,8,9); $teams =array_chunk ($teams, 2); Print_r ($teams); /* Array ( [0] => Array ( [0] => 1 [1] => 2 ) [1] => Array ( [0] => 3 [1] => 4 ) [2] => Array ( [0] => 5 [1] => 6 ) [3] => Array ( [0] => 7 [1] => 8 ) [4] => Array ( [0] => 9 ) ) */ ?>

The array_chunk () function splits an array into a new array block.
The number of cells in each array is determined by the size parameter. The number of cells in the last array may be few.
An optional parameter, Preserve_key, is a Boolean value that specifies whether the elements of the new array have the same key (for associative arrays) as the original array, or a new number key (for an indexed array) starting with 0. The default is to assign a new key.