PHP Functions

Function

• A function is a named block of code that performs a specific task.
• Functions are compiled only once for the page.
• They improve readability by isolating code that performs specific tasks.

Now, analyse all the concepts of Function in PHP with a suitable example. Consider the follow output:-

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When  I will click on "Default Argument", the output will be as follows:

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When  I will click on "Passing Two Arguments", the output will be as follows:

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When  I will click on "Function Argument", the output will be as follows:

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When  I will click on "Variable Scope", the output will be as follows:

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When  I will click on "Global Scope", the output will be as follows:

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When  I will click on "Call By Value", the output will be as follows:

The code of the above page is as follows:-

When  I will click on "Call By Reference", the output will be as follows:

The code of the above page is as follows:-

When  I will click on "Static Variable", the output will be as follows:

The code of the above page is as follows:-

When  I will click on "Variable Functions", the output will be as follows:

The code of the above page is as follows:-