php 数据库链式操作--伪代码

<?php

	class Test 
	{
	 
	    public function __construct()
	    {
	        echo "construct";
	    }

	    

	    public function where()
	    {
	    	echo "where";
	    	return $this;
	    }

	    public function count()
	    {
	    	echo "count";
	    	return $this;
	    }
	}

	class Db 
	{
		static $obj = null;
		
	    // static public function name($param='')
	    // {
	    
	    // }

	    static function __callStatic($func, $param)
	    {
	        // TODO: Implement __callStatic() method.
	        var_dump($func, $param);
	        self::$obj = new Test();
	    	return  self::$obj;
	    }


	    
	}

	
	Db::name('user')->where()->count();