我正在编写一个类,它使用__get()
并__set()
在主数组中存储和检索数组元素。我进行了检查以使某些元素变得难以捉摸,基本上是为了重新创建私有属性。
我注意到它似乎__get
拦截了对类属性的所有调用。这对我来说很糟糕,因为我希望有一个外部世界私有的变量(通过 get 不可用),但我试图通过直接从类中引用主数组来访问它。当然,主数组不在可获取属性的白名单中:(
有没有办法可以在使用__get()
and的 php 类中模拟公共和私有属性__set()
?
例子:
<?
abstract class abstraction {
private $arrSettables;
private $arrGettables;
private $arrPropertyValues;
private $arrProperties;
private $blnExists = FALSE;
public function __construct( $arrPropertyValues, $arrSettables, $arrGettables ) {
$this->arrProperties = array_keys($arrPropertyValues);
$this->arrPropertyValues = $arrPropertyValues;
$this->arrSettables = $arrSettables;
$this->arrGettables = $arrGettables;
}
public function __get( $var ) {
echo "__get()ing:\n";
if ( ! in_array($var, $this->arrGettables) ) {
throw new Exception("$var is not accessible.");
}
return $this->arrPropertyValues[$var];
}
public function __set( $val, $var ) {
echo "__set()ing:\n";
if ( ! in_array($this->arrSettables, $var) ) {
throw new Exception("$var is not settable.");
}
return $this->arrPropertyValues[$var];
}
} // end class declaration
class concrete extends abstraction {
public function __construct( $arrPropertyValues, $arrSettables, $arrGettables ) {
parent::__construct( $arrPropertyValues, $arrSettables, $arrGettables );
}
public function runTest() {
echo "Accessing array directly:\n";
$this->arrPropertyValues['color'] = "red";
echo "Color is {$this->arrPropertyValues['color']}.\n";
echo "Referencing property:\n";
echo "Color is {$this->color}.\n";
$this->color = "blue";
echo "Color is {$this->color}.\n";
$rand = "a" . mt_rand(0,10000000);
$this->$rand = "Here is a random value";
echo "'$rand' is {$this->$rand}.\n";
}
}
try {
$objBlock = & new concrete( array("color"=>"green"), array("color"), array("color") );
$objBlock->runTest();
} catch ( exception $e ) {
echo "Caught Exeption $e./n/n";
}
// no terminating delimiter
$ php test.php
Accessing array directly:
__get()ing:
Caught Exeption exception 'Exception' with message 'arrPropertyValues is not accessible.' in /var/www/test.php:23
Stack trace:
#0 /var/www/test.php(50): abstraction->__get('arrPropertyValu...')
#1 /var/www//test.php(68): concrete->runTest()
#2 {main}.