Php two-dimensional array to find the same key and concatenate value

{Code...} reorganizes the same value of ListNo into an array. The effect is: {code ...}

array(    array(        "ShopID" => "C024",        "Name" => "a",        "ListNo" => 13343    ),    array(        "ShopID" => "C024",        "Name" => "c",        "ListNo" => 13343    ),    array(        "ShopID" => "C024",        "Name" => "b",        "ListNo" => 13342    ),    array(        "ShopID" => "C024",        "Name" => "d",        "ListNo" => 13342    ),    array(        "ShopID" => "C024",        "Name" => "e",        "ListNo" => 13346    ),    array(        "ShopID" => "C024",        "Name" => "f",        "ListNo" => 13346    ));

The same value of ListNo is reorganized into an array to achieve the following results:

array("ShopID" => "C024", "Name" => array("a", "c"), "ListNo" = 13343);

Reply content:

array(    array(        "ShopID" => "C024",        "Name" => "a",        "ListNo" => 13343    ),    array(        "ShopID" => "C024",        "Name" => "c",        "ListNo" => 13343    ),    array(        "ShopID" => "C024",        "Name" => "b",        "ListNo" => 13342    ),    array(        "ShopID" => "C024",        "Name" => "d",        "ListNo" => 13342    ),    array(        "ShopID" => "C024",        "Name" => "e",        "ListNo" => 13346    ),    array(        "ShopID" => "C024",        "Name" => "f",        "ListNo" => 13346    ));

The same value of ListNo is reorganized into an array to achieve the following results:

array("ShopID" => "C024", "Name" => array("a", "c"), "ListNo" = 13343);

    $arr = array(        array(            "ShopID" => "C024",            "Name"   => "a",            "ListNo" => 13343        ),        array(            "ShopID" => "C024",            "Name"   => "c",            "ListNo" => 13343        ),        array(            "ShopID" => "C024",            "Name"   => "b",            "ListNo" => 13342        ),        array(            "ShopID" => "C024",            "Name"   => "d",            "ListNo" => 13342        ),        array(            "ShopID" => "C024",            "Name"   => "e",            "ListNo" => 13346        ),        array(            "ShopID" => "C024",            "Name"   => "f",            "ListNo" => 13346        )    );    $lists = array_column($arr, 'ListNo');    $lists = array_flip(array_flip($lists));    $result = array();    foreach ($lists as $k => $v) {        $res = array();        foreach ($arr as $key => $val) {            if ($val['ListNo'] == $v) {                if (count($res) == 0) {                    $res = $val;                } else {                    if ($res['ShopID'] != $val['ShopID']) {                        if (!is_array($res['ShopID'])) {                            $res['ShopID'] = array($res['ShopID'], $val['ShopID']);                        } else {                            $res['ShopID'][] = $val['ShopID'];                        }                    }                    if ($res['Name'] != $val['Name']) {                        if (!is_array($res['Name'])) {                            $res['Name'] = array($res['Name'], $val['Name']);                        } else {                            $res['Name'][] = $val['Name'];                        }                    }                }            }//        var_dump($res);        }        $result[] = $res;    }    var_dump($result);

The result is as follows: array (size = 3)

0 =>

array (size=3)  'ShopID' => string 'C024' (length=4)  'Name' =>     array (size=2)      0 => string 'a' (length=1)      1 => string 'c' (length=1)  'ListNo' => int 13343

1 =>

array (size=3)  'ShopID' => string 'C024' (length=4)  'Name' =>     array (size=2)      0 => string 'b' (length=1)      1 => string 'd' (length=1)  'ListNo' => int 13342

2 =>

array (size=3)  'ShopID' =>     array (size=2)      0 => string 'C024' (length=4)      1 => string 'C025' (length=4)  'Name' =>     array (size=3)      0 => string 'e' (length=1)      1 => string 'f' (length=1)      2 => string 'g' (length=1)  'ListNo' => int 13346

Traverse the array, review the ListNo as the Key, and then determine whether to merge the Name if the isset has the same Key. If not, write the data directly. At the end, array_merge clears the Key of the array.