Are there any specific methods or interfaces that need to be implemented for sorting objects in PHP?

To sort objects in PHP, you can use the `usort()` function along with a custom comparison function. This function will compare the objects based on the criteria you specify and reorder them accordingly. You will need to implement the `Comparable` interface in your objects and define the comparison logic in the `compareTo()` method. 

interface Comparable {
    public function compareTo($other): int;
}

class MyClass implements Comparable {
    private $value;

    public function __construct($value) {
        $this->value = $value;
    }

    public function getValue() {
        return $this->value;
    }

    public function compareTo($other): int {
        return $this->value - $other->getValue();
    }
}

$objects = [new MyClass(3), new MyClass(1), new MyClass(2)];

usort($objects, function($a, $b) {
    return $a->compareTo($b);
});

foreach ($objects as $object) {
    echo $object->getValue() . " ";
}

Keywords

sorting objects methods interfaces implementation

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