使用子数组中的值将多维数组转换为一维

Question

I have the following PHP/MYSQL query:

$sql = SELECT type, count(*) AS total FROM stats GROUP BY type
$this->sql = $sql;

function numObjects() {

        $stats = $this->conn->query($this->sql);
        while($stat_type = $stats->fetch_assoc()){
            $category[] = $stat_type;
        }
        return $category;
    }

It's a simple query, but I just can't figure out how to retrieve the data the way I want since it is returning a multidimensional array.

array(2) { 
  [0]=> array(2) { 
    ["type"]=> string(4) "page" 
    ["total"]=> string(1) "1" 
   } 
  [1]=> array(2) { 
    ["type"]=> string(8) "category" 
    ["total"]=> string(1) "1" 
   } 
}

What I'm looking to do is convert the values from each array, into key => value pairs. Like this:

["page"]=> "1"
["category"]=> "1"

I've been able to convert it into a single dimensional array, but not in the correct format.

Answer 1

For PHP >= 5.5, I give you the array_column() function

$reformatted = array_column(
    $category,
    'total',
    'type'
);

Answer 2

try this:

$new_array = array();
foreach ($old_array as $elem) {
    $new_array[$elem["type"]] = $elem["total"];
}

var_dump($new_array); //for print the array