In PHP, how do I sort objects in vanilla PHP?

In vanilla PHP, you can sort objects by a property using the usort function. This function takes an array and a callback function to define the sort order. Here’s how you can do it:


    <?php
    class Person {
        public $name;
        public $age;
        
        public function __construct($name, $age) {
            $this->name = $name;
            $this->age = $age;
        }
    }

    $people = [
        new Person("Alice", 30),
        new Person("Bob", 25),
        new Person("Charlie", 35),
    ];

    usort($people, function($a, $b) {
        return $a->age <=> $b->age; // Sort by age
    });

    foreach ($people as $person) {
        echo $person->name . " is " . $person->age . " years old.<br>";
    }
    ?>