php-Arrays function-chunk-split an array into multiple arrays_PHP tutorial

chunk() function
【Function】
This function will split an array into multiple arrays,
​​​​The number of cells in each array is determined by size
The number of cells in the last array may be a few less
The resulting array is a cell in a multidimensional array, and its index starts from zero
【Scope of use】
            >=4.2.0, php5
【Use】
array array_chunk(array input ,int size [,bool preserve_keys] )
​​​​​ input/required/split array
size/required/split number to determine the number of cells in the array
Preserve_keys/optional/True retains the original key names of the array,
False key name is a digital index from scratch, and defaults to False
【Example】
[php]
          $arr = array( "key1" => "val1", "key2" => "val2",
"key3" => "val3", "key4" => "val4");
           print_r( array_chunk( $arr, 2 ) );
            print_r( array_chunk( $arr, 2, True ) );
           print_r( array_chunk( $arr, 3 ) );
/*
Array
(
[0] => Array
(
​​​​​[0] => [1] = & gt; Val2
)

[1] => Array
(
                                                   [0] => ​​​​​[1] => )

)
Array
(
[0] => Array
(
[key1] => val1
[key2] => val2
)

[1] => Array
(
[key3] => val3
[key4] => val4
)

)
Array
(
[0] => Array
(
​​​​​[0] => [1] = & gt; Val2
[2] = & gt; Val3
)

[1] => Array
(
                                                   [0] => )

)
*/

http://www.bkjia.com/PHPjc/478197.html