PHP Fundamentals, PHP

Question:What are the PHP's authentication variable? 
AnswerPHP uses two authentication variables as follows:

1. $_SERVER['PHP-AUTH-USER']
2. $_SERVER['PHP-AUTH-PW']
These variables store the username and password values respectively.

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Question:What are the benefits of using oop? 
Answer
1.Shifts a major paradigm in development strategy.
2.Shifts the programs procedural events to real life entites.
3.Refocusing application data rather than it's logic.
4.It gives the fundamental concept for creating powerful programming model.

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Question:What are configuration directives and scopes? Write an example for each scope. 
Answercoming soon..

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Question:Write all bitwise operators in term of PHP. 
Answercoming soon...

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Question:What is datatype? Write variable scope with an example for each scope. 
Answercoming soon...

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