PHP가 _autoload를 사용하여 클래스 인스턴스를 자동으로 로드하는 방법에 대한 자세한 설명

<?php 
class abc{ 
function construct() 
{ 
echo &#39;www.hzhuti.com; 
} 
} 
?>

<?php 
class LOAD 
{ 
static function loadClass($class_name) 
{ 
$filename = $class_name.".class.php"; 
if (is_file($filename)) return include_once $filename; 
} 
} 
/** 
* 设置对象的自动载入 
* spl_autoload_register — Register given function as autoload() implementation 
*/ 
spl_autoload_register(array(&#39;LOAD&#39;, &#39;loadClass&#39;)); 
$a = new Test();//实现
自动加载
，很多框架就用这种方法
自动加载类
 
?>

class ClassA{ 
public function construct(){ 
echo “ClassA load success!”; 
} 
} 
//定义一个类ClassA，文件名为ClassA.php 
class ClassA{ 
public function construct(){ 
echo “ClassA load success!”; 
} 
} 
class ClassB extends ClassA { 
public function construct(){ 
//parent::construct(); 
echo “ClassB load success!”; 
} 
} 
//定义一个类ClassB，文件名为ClassB.php，ClassB继承ClassA 
class ClassB extends ClassA { 
public function construct(){ 
//parent::construct(); 
echo “ClassB load success!”; 
} 
}

function autoload($classname){ 
$classpath=”./”.$classname.'.php'; 
if(file_exists($classpath)){ 
require_once($classpath); 
} 
else{ 
echo ‘class file'.$classpath.'not found!'; 
} 
} 
$newobj = new ClassA(); 
$newobj = new ClassB();