在php中自定义数组

Question

I have an array like this:

 Array ( [0] => Array 
             ([category_name] => Operating System
              [sub_category_name] => Windows 8) 
         [1] => Array 
             ([category_name] => Operating System
              [sub_category_name] => Linux)
         [2] => Array 
             ([category_name] => Mobile
              [sub_category_name] => Nokia))

I would like to customize it like this:

Array('Operating System' => 'Windows 8', 'Operating System' => 'Linux', 'Mobile' => 'Nokia')

Thanks in advance. Any help or suggestion would be a great help...

Answer 1

this may help

$result = array();
foreach($firstArray as $row) {
    $result[$row['category_name']] = $row['sub_category_name'];
}

if you want to merge duplicate keys you can write like this

$result = array();
foreach($firstArray as $row) {
    if(isset($result[$row['category_name']])) {
        if(!is_array($result[$row['category_name']])) {
            $tmp = array();
            $tmp[] = $result[$row['category_name']];
            $result[$row['category_name']] = $tmp;
        }
        $result[$row['category_name']][] = $row['sub_category_name'];
    } else 
    $result[$row['category_name']] = $row['sub_category_name'];
}