php - how to merge 2d array that have different no of element for each array

Question

I have 2 set of 2d array and i want merge into 1 2d array. but the number of element in each array its not same and for the first 2 element is same and i don\'t want to duplicat

Answer 1

If both arrays are in the same order, the code is pretty straightforward:

$a = array(
    array('5/2/2013', '9:31:00 AM', '0.395', '0.395', '302.855', '0.563'),
    array('5/2/2013', '9:33:00 AM', '0.383', '0.383', '303.431', '0.563'),
);

$b = array(
    array('5/2/2013', '9:31:00 AM', '-1.000', '-1.000', '-1.000', '-1.670', '-1.000', '-11.000'),
    array('5/2/2013', '9:33:00 AM', '-1.000', '-1.000', '-1.000', '-1.670', '-1.000', '-11.000'),
);


$i = new MultipleIterator(MultipleIterator::MIT_NEED_ALL | MultipleIterator::MIT_KEYS_ASSOC);
$i->attachIterator(new ArrayIterator($a), 'a');
$i->attachIterator(new ArrayIterator($b), 'b');

$result = [];
foreach ($i as $v) {
    $result[] = array_merge($v['a'], array_slice($v['b'], 2));
}
print_r($result);

You basically iterate over both arrays at the same time and for each element construct the final array by merging the first with the second (skipping the common part).

Result:

Array
(
    [0] => Array
        (
            [0] => 5/2/2013
            [1] => 9:31:00 AM
            [2] => 0.395
            [3] => 0.395
            [4] => 302.855
            [5] => 0.563
            [6] => -1.000
            [7] => -1.000
            [8] => -1.000
            [9] => -1.670
            [10] => -1.000
            [11] => -11.000
        )

    [1] => Array
        (
            [0] => 5/2/2013
            [1] => 9:33:00 AM
            [2] => 0.383
            [3] => 0.383
            [4] => 303.431
            [5] => 0.563
            [6] => -1.000
            [7] => -1.000
            [8] => -1.000
            [9] => -1.670
            [10] => -1.000
            [11] => -11.000
        )
)