Question

I have the following array:

$list = array('item1','item2','item3','item4','item5','item6');

i need to take this array and break it into smaller arrays within 1 array for the csv. Each small array needs to have ‘999999’ at index 0, followed by the next two items in the $list array. So the final result would be like this:

$newList = array(
    array(999999, "item1" , "item2"),
    array(999999, "item3" , "item4"),
    array(999999, "item5" , "item6")
); 

The original list array may contain up to 100 values at sometimes. What is the best way to achieve this?

Answer 1

Here’s a different way of doing it, please see the comment as to where you place your additional elements to be prepended (you could add a second array into the merge at the end to add elements after the 2 list items too!)

See here for working example: http://codepad.org/hucpT5Yo

<?php
$list = array('item1','item2','item3','item4','item5','item6');
$list_chunks = array_chunk($list,2);

$list_chunks2 = array_map(
                     create_function(
                        '$x',  
                        'return array_merge(array(
                           /* This array is prepended to the second, 
                              add as many elements as you like */
                           999999,
                           "another element to add",
                           483274832
                            ), 
                        $x);'), 
                     $list_chunks);

print_r($list_chunks2);
?>