php类自动装载、链式操作、魔术方法实现代码

<?php
namespace Tests;
class Test1{
  static function test(){
    echo __CLASS__.'<br>';
    echo __FILE__.'<br>';
  }
}

<?php
include "load.php";
Tests\Test1::test();

<?php
class Loader
{
  static function loadClass($class)
  {
    $class =  __DIR__.DIRECTORY_SEPARATOR.str_replace('\\','/',$class).'.php';
    if (file_exists($class)) {
      include $class;
      return;
    }
  }
}
spl_autoload_register(array('Loader','loadClass'));

namespace Baobab;

class Database{
 function where($where){
  return $this;
 }
 
 function order($order) {
  return $this;
 }
 
 function limit($limit){
  return $this;
 }
}

?>

//index.php
$db = new Baobab\Database();
$db->where('id = 1')->order('order by id')->limit(1);

<?php
namespace Baobab;

class Object{
 protected $array = array();
 function __set($key, $value){
  $this->array[$key] = $value;
 }
 function __get($key){
  //echo __METHOD__;
  return $this->array[$key];
 }
 
 function __call($func, $param){
  //var_dump($func,$param);
  return 'magic function';
 }
 
 static function __callstatic($func, $param) {
  //var_dump($func, $param);
  return 'magic static function';
 }
 
 function __toString(){
  return __CLASS__;
 }
 
 function __invoke($param) {
  return var_dump($param);
 }
 
}

$obj = new baobab\Object();
$obj->title = 'hello';
echo $obj->title;
echo $obj->test1('hello', 123);
echo $obj::test1('hello1', 1234);
echo $obj;
echo $obj('test1');