In PHP, what functions or methods can be used to efficiently sort arrays based on specific criteria like points or rankings?

To efficiently sort arrays based on specific criteria like points or rankings in PHP, you can use the `usort()` function along with a custom comparison function. The custom comparison function should compare the specific criteria you want to sort by and return -1, 0, or 1 based on the comparison result. This allows you to sort the array based on your desired criteria.

// Sample array of players with points
$players = [
    ['name' => 'Alice', 'points' => 100],
    ['name' => 'Bob', 'points' => 80],
    ['name' => 'Charlie', 'points' => 120]
];

// Custom comparison function to sort by points
usort($players, function($a, $b) {
    return $b['points'] - $a['points']; // Sort in descending order of points
});

// Print sorted array
print_r($players);