Group array data by first character and create subarrays in each group

Question

I have an array something like this:

$array = array(
    'Actual Hours' => 'http://www.example.com/actual',
    'Algorithm' => 'http://www.example.com/algorithm',
    'Time Clock App' => 'http://www.example.com/time',
)

And I want the output something like this:

Array
(
    [A] => [
        [Actual Hours] => http://www.example.com/actual
        [Algorithm] => http://www.example.com/algorithm
    ],
    [T] => [
        [Time Clock App] => http://www.example.com/time        
    ],
    
)

So basically I want something like this ..

As you can see, I want the first letter of the array key and want to sort it by adding a new key and group it that way.

Answer 1

Here you go !

$array = array(
    'Actual Hours' => 'http://www.example.com/actual',
    'Algorithm' => 'http://www.example.com/algorithm',
    'Time Clock App' => 'http://www.example.com/time',

);

$new_array = [];
foreach( $array as $key => $value ) {
    $char = strtoupper(substr($key,0,1));
    if(!array_key_exists( $char, $new_array)) {
        $new_array[$char] = [];
    }
    $new_array[$char][$key] = $value;
}

$array = $new_array;