从PHP中扩展的类创建类的新实例
我正在用PHP编写一个大脚本,它需要在将来用户创建的扩展中对其进行安全保护。 我想创建一些东西,比如权限类检查对一些核心变量的扩展访问等 以下是startup类:从PHP中扩展的类创建类的新实例,php,class,extends,Php,Class,Extends,我正在用PHP编写一个大脚本,它需要在将来用户创建的扩展中对其进行安全保护。 我想创建一些东西,比如权限类检查对一些核心变量的扩展访问等 以下是startup类: class SystemStartup { private function startClass ( ) { require ( dirname( __FILE__ ) . '/sys.run.php' ); //starting SystemRun with something
class SystemStartup
{
private function startClass ( ) {
require ( dirname( __FILE__ ) . '/sys.run.php' );
//starting SystemRun with something like core security token
new SystemRun ( hash ( 'sha256' , $_SERVER['HTTP_USER_AGENT'] . $_SERVER['REMOTE_ADDR'] . microtime ( TRUE ) ) );
}
function __construct ( ) {
//here i have some security stuff like checking class not already running
$this -> startClass ( );
}
function __destruct ( ) {
//wywolane na samym koncu
}
};
系统运行类:
class SystemRun
{
private $SystemToken;
//static because i want to be callable from other classes extending SystemRun
protected static $SystemUrlControl;
private function startClass ( ) {
//before more code
//loading file with child class
require ( dirname( __FILE__ ) . '/urlcontrol.php' );
//starting it with security token
echo $this -> SystemToken; //just for check
self :: $SystemUrlControl = new SystemUrlControl ( $this -> SystemToken );
//more more more code (its main class)
}
protected function validateToken ( $SystemToken ) {
echo $this -> SystemToken; //just for check
//this should check tokens are the same
if ( $this -> SystemToken == $SystemToken ) return TRUE;
return FALSE;
}
function __construct ( $SystemToken ) {
//saving token for next classes
$this -> SystemToken = $SystemToken;
$this -> startClass ( );
}
};
现在是带有扩展SystemRun的SystemUrlControl
class SystemUrlControl extends SystemRun
{
private $SystemToken;
//functions
//more functions
//more more more
function __construct ( $SystemToken ) {
if ( !parent :: validateToken ( $SystemToken ) ) echo 'somebody else called me!';
$this -> SystemToken = $SystemToken;
}
};
问题在于,从SystemUrlControl
调用validateToken返回FALSE
-SystemRun时,会将其自身的SystemToken视为NULL
输出(来自echo)为:
在validateToken方法中,您有这样一个选项
$this -> $SystemToken
应该是
$this -> SystemToken
这个错误可能是由于文件中奇怪的格式(在
$this->
和self::
和成员变量/函数之间使用空格造成的。是的,在这里编写代码是错误的:)我有$this->SystemToken。谢谢:)self::$SystemToken
不是静态成员,因此必须与$this->SystemToken
一起使用。它的一个“ctrl+z”在调试时会更改;)
$this -> SystemToken