Sort array by object property in PHP?

Question

If I have an object as such:

class Person {
  var $age;
  function __construct($age) {
    $this->age = $age;
  }
}

and I have any array

Answer 1

I went with the following approach: created a function that takes an array of objects, then inside the function I create an associative array using the property as key for the array, then sort they array keys using ksort:

class Person {
    var $age;
    function __construct($age) {
      $this->age = $age;
    }
}

function sortPerson($persons = Array()){
    foreach($persons as $person){
        $sorted[$person->age] = $person;
    }
    ksort($sorted);
    return array_values($sorted);
}

$person1 = new Person(14);
$person2 = new Person(5);

$persons = array($person1, $person2);
$person = sortPerson($persons);

echo $person[0]->age."\n".$person[1]->age;
/* Output:
5
14
*/