PHP isset($ this)并在静态和对象上下文中使用相同的对象方法 [英] PHP isset($this) and using the same object method in a static and object context
问题描述
我正在研究一个需要通过静态函数调用以及对象方法进行访问的类.我发现的一件事是我正在跨多个功能复制逻辑.
I'm working on a class which needs to be accessible via static function calls as well as object methods. One thing I have found is that I'm duplicating logic across multiple functions.
简化示例:
class Configurable{
protected $configurations = array();
protected static $static_configurations = array();
public function configure($name, $value){
// ...lots of validation logic...
$this->configurations[$name] = $value;
}
public static function static_configure($name, $value){
// ...lots of validation logic (repeated)...
self::$static_configurations[$name] = $value;
}
}
我找到了解决方案，但感觉确实很脏:
I've found a solution to this, but it feels really dirty:
class Configurable{
protected $configurations = array();
protected static $static_configurations = array();
public function configure($name, $value){
// ...lots of validation logic...
if (isset($this)){
$this->configurations[$name] = $value;
}
else{
self::$static_configurations[$name] = $value;
}
}
}
我还需要静态功能，以便可以在整个应用程序中设置配置.另外，使用此技术的好处是，我可以在两个范围中使用相同的方法名称.
I need the static function as well so that I can set configurations throughout the application. Also, the nice thing with this technique is that I can use the same method names in both scopes.
这样的测试范围是否存在任何问题?性能问题，前向兼容性问题等.所有这些都对我适用于PHP 5.2，并且我不需要支持< 5.
Are there any problems with testing scope like this? Performance issues, forward compatibility issues, etc. It all works for me on PHP 5.2, and I don't need to support <5.
推荐答案
第二种方法的问题在于，将错误报告设置为E_STRICT时，它将导致错误.例如:
The issue with the second method is that it will result in an error when error reporting is set to E_STRICT. For example:
严格的标准:非静态方法Foo :: bar()不应在第10行的/home/yacoby/dev/php/test.php中静态调用
Strict standards: Non-static method Foo::bar() should not be called statically in /home/yacoby/dev/php/test.php on line 10
PHP6的一点是E_STRICT错误已移至E_ALL.换句话说，E_ALL将涵盖所有错误，包括不允许您静态调用非静态方法.
A point with PHP6 is that the E_STRICT errors are moved to E_ALL. In other words E_ALL will cover all errors including not allowing you to call non static methods statically.
另一种方法可能是将验证逻辑移至静态函数.这样，非静态函数和静态函数可以调用验证逻辑.
An alternative method may be to move the validation logic to a static function. That way the non static function and the static function can call the validation logic.
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