Implementation of PHP two-dimensional array sorting according to specified fields

This article mainly introduces the implementation of sorting PHP two-dimensional arrays according to specified fields. It has a certain reference value. Now I share it with you. Friends in need can refer to it.

Encountered problems : After merging two arrays using the array_merge() function that comes with PHP, I want to sort the new array according to the 'post_time' field shared by the two arrays

Solution: Learn from the official manual There is the array_multisort() function, can sort multiple arrays or multi-dimensional arrays and return the sorted array, in which the string key names will be retained, but the numeric key names will be re-indexed, starting from 0 and ending with 1 incrementally.

This function is encapsulated below for easy calling:

/**
 * 二维数组按照指定字段进行排序
 * @params array $array 需要排序的数组
 * @params string $field 排序的字段
 * @params string $sort 排序顺序标志 SORT_DESC 降序；SORT_ASC 升序
 */
function arraySequence($array, $field, $sort = 'SORT_DESC') {
    $arrSort = array();
    foreach ($array as $uniqid => $row) {
        foreach ($row as $key => $value) {
            $arrSort[$key][$uniqid] = $value;
        }
    }
    array_multisort($arrSort[$field], constant($sort), $array);
    return $array;
}

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