Array Chunk based on Key PHP

array-chunk-based-key.php

<?php
/**
 * @author: Sohel Rana <me.sohelrana@gmail.com>
 * @author URL: http://sohelrana.me
 * @licence: MIT
 * @link: https://blog.sohelrana.me/array-chunk-based-on-key-value-in-php/
 *
 * This function is for divide/group/chunk an multidimensional array based on same key.
 */


/**
 * @param $data
 * @param $groupByKey
 * @return array
 */
function arrayChunkByKeyValue($data, $groupByKey)
{
    $groupArray = [];
    foreach ($data as $singleData) {
        $groupArray[$singleData[$groupByKey]][] = $singleData;
    }

    return $groupArray;
}

$posts = [
    [
        'category' => 'php',
        'post_id' => 100,
    ],
    [
        'category' => 'html',
        'post_id' => 101,
    ],
    [
        'category' => 'php',
        'post_id' => 102,
    ],
    [
        'category' => 'js',
        'post_id' => 103,
    ],
    [
        'category' => 'html',
        'post_id' => 104,
    ],
    [
        'category' => 'php',
        'post_id' => 104,
    ],
];

$result = arrayChunkByKeyValue($posts, 'category');
var_export($result);