PHP: Sorting custom classes, using java-like Comparable?

Question

How can I make my own custom class be sortable using sort() for example?

I\'ve been scanning the web to find any method of making a class Comparable like in Java but wi

Answer 1

__toString() works for me:

class Genre
{
    private $genre;
    private $count;

    public function __construct( $genre, $count = 0 )
    {
        $this->genre = $genre;
        $this->count = $count;
    }

    public function __toString()
    {
        return $this->count . ' ' . $this->genre;
    }    
}

$collection = array(
    new Genre( 'alternative', 3 ),
    new Genre( 'jazz', 2 ),
    new Genre( 'hiphop', 1 ),
    new Genre( 'heavy metal', 1 )
);

natsort( $collection );

foreach( $collection as $genre )
{
    echo $genre . "\n";
}

Produces:

1 heavy metal
1 hiphop
2 jazz
3 alternative