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PHP 7 Programming Cookbook by Doug Bierer

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Using getters and setters

At first glance, it would seemingly make sense to define classes with public properties, which can then be directly read or written. It is considered a best practice, however, to make properties protected, and to then define a getter and setter for each. As the name implies, a getter retrieves the value of a property. A setter is used to set the value.

Tip

Best practice

Define properties as protected to prevent accidental outside access. Use public get* and set* methods to provide access to these properties. In this manner, not only can you more precisely control access, but you can also make formatting and data type changes to the properties while getting and setting them.

How to do it...

  1. Getters and setters provide additional ...

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