How can I loop through an array in Php and get 3 items at a time? [duplicate]

Question

I want to loop through an array in Php and get 3 items at a time, for example if an array contains these numbers: [1,2,3,4,5,6,7,8,9,10,11] then I want to be able to loop through it and get 3 at a time, but if the list does not break evenly into 3's then get whatever is left over.

So, in this example I would want (1,2,3), (4,5,6), (7,8,9), (10, 11). What is the easiest way to do this? This is what I have so far which is getting just one item at a time from the array:

            for ($w = 0; $w < count($decoded_photos); $w++) {
                $photo_reference = $decoded_photos[$w]["photo_reference"];
                echo "photo reference " . $photo_reference;    
            }

Kevin Goedecke · Accepted Answer · 2020-02-09 00:29:37Z

2

It looks like what you're looking for is exactly what the array_chunk method does.

Have a look here: https://www.php.net/manual/en/function.array-chunk.php

In your case:

$array = [1, 2, 3, 4, 5, 6, 7, 8, 9 , 10, 11];
$chunked_array = array_chunk($array, 3);
print_r($chunked_array);

Will return

Array
(
    [0] => Array
        (
            [0] => 1
            [1] => 2
            [2] => 3
        )

    [1] => Array
        (
            [1] => 4
            [2] => 5
            [3] => 6
        )
   ...
)

Once you have the chunked array you can just loop over that and then output all 3 keys at a time:

foreach ($chunked_array as $key => $value) {
   echo $value[0];
   echo $value[1];
   echo $value[2];
}

answered Feb 9, 2020 at 0:29

Kevin Goedecke

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1 Comment

mickmackusa Over a year ago

This question is a duplicate -- as all basic question are after millions of questions and over 10 years of answers.

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