Make first array element key and second value in php flat array-CodePudding

I am working on a project where I have to sum score for some tags. The idea is to make the array even values key and odd values as values I did search on google but I fail to create a structure like below. I need the array structure like below this way I can easily sum the values with the same key.

$array = array("22" => 3, "27" => 2, "30" => 1, so on...) from the below array.


[0] => 22
[1] => 3
[2] => 27
[3] => 2
[4] => 30
[5] => 1
[6] => 22
[7] => 3
[8] => 25
[9] => 2
[10] => 28
[11] => 1

The code I am using to map the array with key-value pair according to the above logic.

$rank = $_POST['ranking_details'];
$rinfo = explode('_', $rank);

$result = array_map(function($v){
    return [$v[0] => $v[1]];
}, $rinfo);

print_r($result);

Output:

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

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

    [2] => Array
        (
            [2] => 7
        )

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

    [4] => Array
        (
            [3] => 0
        )

CodePudding user response：

Is this what you're looking for?

Code:

$arr = array(22, 3, 27, 2, 30, 1, 22, 3);

for ($i = 0; $i < count($arr); $i  = 2) {
    $dic[$arr[$i]] = $arr[$i   1];
}

print_r($dic);

Output:

Array
(
    [22] => 3
    [27] => 2
    [30] => 1
)

CodePudding user response：

you can use this

$result = [];

for($i = 0; $i < count($rinfo); $i  = 2) {
    if(true === isset($rinfo[$i   1])){
        $result[$rinfo[$i]] = $rinfo[$i   1];
    }
}

example:

$rinfo = [1,2,3,4,5,6,7,8];

//print_r($result);
Array
(
    [1] => 2
    [3] => 4
    [5] => 6
    [7] => 8
)