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How can public, private, and protected keywords be used in PHP classes and what are their purposes?

In PHP classes, the public, private, and protected keywords are used to control the visibility of properties and methods within the class and its subc...

What is the difference between accessing a parent class variable in PHP OOP using protected vs public?

When accessing a parent class variable in PHP OOP, using `protected` allows the variable to be accessed by child classes, while using `public` makes t...

What are the steps involved in generating a public and secret key pair using mcrypt in PHP?

To generate a public and secret key pair using mcrypt in PHP, you can use the `mcrypt_create_iv()` function to create a random key of the desired leng...

What are the differences between defining object properties using "var" in PHP4 versus using "public, protected, or private" in PHP5?

In PHP4, defining object properties using "var" made them public by default. In PHP5, the use of "var" to define properties has been deprecated in fav...

Are all public methods automatically declared as static in PHP?

No, not all public methods are automatically declared as static in PHP. By default, methods in PHP are not static unless explicitly declared as such u...

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