sorting multidimensional array by one value

Laravel has collections which makes this really easy! So let's say you have your array here

$array = [ 
    'subjects' => [
        0 => [
            'id' => 4,
            'name' => 'abc',
            'type' => 'arts',
        ],
        // More data here
    ],
    'students' => [
        0 => [
            'course_id' => 19,
            'subject_number' => 30,
            'subject_name' => 'Season 30',
            'start_year' => 2006,   
            'end_year' => 2009,
        ],
        1 => [
            'course_id' => 196,
            'subject_number' => 31,
            'subject_name' => 'Season 31',
            'start_year' => 2007,   
            'end_year' => 2010,
        ],
        // More data here
    ],
];

// Make a collection from the students
$collection = collect($array['students']);

// Order them by the given field
// Each item is an array item of the "students" array
$collection->sortBy(function ($item) {
    return $item['start_year'];
});

// Convert the collection back to an array
$sortedArray  = $collection->all();

Documentation: https://laravel.com/docs/5.7/collections#method-sortby

Let me know if this works for you!

@bobbybouwmann thanks for reply in my case $collection = collect($array[0]['students']); is giving back the result in students collection. But $collection->sortBy(function ($item) { return $item['start_year']; }); giving an err like this (1/1) ErrorException Illegal string offset 'start_year'

MMh you can check what kind of value you get back in the callback. I assumed it would be an array, but it can be an object as well!

$collection->sortBy(function ($item) {
    dd($item); // What does this show? Based on this you can grab the correct value!
});

getting like this

[{"course_id":"423","subject_number":"30","subject_name":"Se 30","start_year":"2009","end_year":"2009"}, \n
 {"course_id":"424","subject_number":"31","subject_name":"Sea 31","start_year":"2010","end_year":"2010",}, \n
.......

@deepu07 So it's a json object? Well that means you first need to decode it to an array to access it.

$array = json_decode($data);