gistfile1.php

<?php

// current implementation
class HairColor implements ReflectionAnnotation {
    public $hairColor = "";
}

[HairColor(hairColor="purple")]
class PurplePeopleEater { }


// Travis' thoughts:
class HairColor implements \SPL\Annotation {
    public $hairColor = '';
    public function __construct($hairColor) {
        $this->hairColor = $hairColor;
    }
}

[HairColor("purple")]
class PurplePeopleEater() { }