PHP has a large pool of functions and a huge number of them can be created by extensions. These functions can be defined at runtime by defining them inside the code. These functions have to be defined inside the parenthesis except for a class constructor function where there is no argument. Functions can be called or referenced by specifying their name.
PHP
Topic: Functions
Explain about Functions in PHP?
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What is a Function?
How To Define a User Function?
How To Invoke a User Function?
How To Return a Value Back to the Function Caller?
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Explain about Functions in PHP?
