PHP中使用匿名函数操作数据库的例子(2)

class Example    {
    var $id;
    var $name;
   
    function Example($id, $name){
        $this->id = $id;
        $this->name = $name;
    }
   
    function setId($id){
        $this->id = $id;
    }
}

class ExampleDao extends BaseDao    {
   
   
    function getAll(){
        return parent::getList("select * from nodes", null, function($idx, $row) {
            return new Example($row["id"], $row["name"]);
        });
    }
   
    function load($id){
        return parent::getSingle("select * from nodes where id = %1\$s", array($id), function($row) {
            return new Example($row["id"], $row["name"]);
        });
    }
   
    function update($example){
        return parent::executeQuery("update nodes set name = '' where  id = -1", null, function($result, $link){
            return $result;
        });
    }
   
    function insert(& $example){
        return parent::executeQuery("insert into nodes", null, function($result, $link) use ($example){
            $id = mysql_insert_id($link);
            $example->setId($id);
            return $result;
        });
    }   
}

$exampleDao = new ExampleDao();

$list = $exampleDao->getAll());

$exampleObject = $exampleDao->load(1));

$exampleDao->update($exampleObject);