How do I sort a PHP array by an element nested inside?

Question

I have an array like the following:

Array
(
    [0] => Array
        (
            \'name\' => \"Friday\"
            \'weight\' => 6
        )
    [1] => Array
          


        

Answer 1

Can be done using an anonymous function.

Also if your 'weight' is a string use one of the other returns (see the commented out lines):

 array (
        'name'   => 'Friday',
        'weight' => 6,
    ),
    1 => array (
        'name'   => 'Monday',
        'weight' => 2,
    ),
);

// sort by 'weight'
usort($arr, function($a, $b) { // anonymous function
    // compare numbers only
    return $a['weight'] - $b['weight'];

    // compare numbers or strings
    //return strcmp($a['weight'], $b['weight']);

    // compare numbers or strings non-case-sensitive
    //return strcmp(strtoupper($a['weight']), strtoupper($b['weight']));
});

var_export($arr);

/*
array (
    0 => array (
        'name'   => 'Monday',
        'weight' => 2,
    ),
    1 => array (
        'name'   => 'Friday',
        'weight' => 6,
    ),
)
*/