php Collection类的设计

用。net开发已经很多年了，最近接触到php，发现php也没好玩。不过发现它里面没有集合类，只有数组，并且数组很强。这里我用数组来包装成一个集合Collection，代码如下：

class CourseCollection extends Collection { public function addItem(Course $obj,$key=null) {parent::addItem($obj,$key);}}class Student{private $_id;private $_name;public $course;publicfunction __construct($id,$name){$this->_id=$id;$this->_name=$name;$this->course=new CourseCollection();$this->course->setLoadCallback('loadCourses',$this);}public function getName(){return $this->_name;}public function getID(){return $this->_id;}public function __toString(){return $this->_name;}public function loadCourses(Collection $col){$col->addItem(new Course(1, "001", "语文"),1);$col->addItem(new Course(2, "002", "数学"),2);}}

$student=new Student(1, "majiang");
print $student->getName();
print $student->course->getItem(1);