重载类属性时验证 setter 的 php 最佳实践
我有一个使用 __set 魔术方法的类。该类的属性之一只能设置一定范围的字符串值，我能想到的最好的例子是 mysql 数据类型 ENUM('value_one','value_two','value_third')。
我是否可以在 __set 方法中放置条件语句来区分正在设置的属性以及该值对于该属性是否有效？
__set 方法中的大型 switch 语句是否被认为是草率的做法，它们是产生所需结果的更好方法吗？
谢谢， 本
I have a class that uses the __set magic method. One of the properties for the class can only be set with a certain range of string values, the best example I can think of is the mysql datatype ENUM('value_one','value_two','value_three').
Would I place conditional statements within the __set method to distinguish between which property is being set and whether the value is valid for that property?
Are large switch statements inside a __set method considered sloppy practice, is their a better way of producing the desired results?
Thanks,
Ben
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第一部分是，第二部分不是。
您的
__set方法应确定尝试设置哪个变量，然后将其余功能传递给私有设置器setPspecialVar。然后，setPspecialVar将包含特定于验证该变量的逻辑，并且如果传递了无效值，则可能会引发异常。或者，您可以将私有设置器设为公共，从而允许两种方式设置变量，但这并不理想，因为两种设置值的方式不是干净的设计。
Yes to the first part, no to the second.
Your
__setmethod should determine which variable is trying to be set and then pass off the rest of the functionality to a private settersetParticularVar.setParticularVarwill then contain the logic specific to validating that variable and can throw an exception if an invalid value is passed.Alternatively, you could make the private setter public instead, allowing two ways to set the variable but this is not as desirable as two ways to set a value is not as clean a design.
__set函数可以检查是否存在名为类似于presetVariableName的方法，该方法被调用并将新值作为参数传递。然后，该函数可以执行验证逻辑，并返回
true或false以确定其是否有效。The
__setfunction could check for the existance of a method named similar topresetVariableName, which is called and passed the new value as a parameter.That function could then perform the validation logic, and return
trueorfalseas to whether it's valid or not.