PHP Functions


What are the PHP functions

PHP functions are the piece of code that can be reused many times. It can take feedback as the lists of arguments and the return value. PHP includes thousands of built-in features.

In PHP, we may also describe Conditional, Function inside Function, and Recursive.

Advantages :

Code Reusability: PHP functions are specified only once, and can be used several times, as in other languages of programming.
Less Code: It saves a ton of coding, so often times you don’t have to compose the reasoning. You can only compose the rationale once when using the method, then reuse it.
Easy to understand: The programming principle is distinguished by the PHP functions. And it’s simpler to grasp the application’s flow as any logic is broken in component type.

Built-in Functions in PHP

A function is a block of code containing itself which executes a specific task.

PHP has a large array of internal or built-in functions that you can call directly to execute a particular task inside your PHP files, such as gettype(), print_r(), var_dump() etc.

User-Defined Functions

PHP also helps you to describe your own features, in addition to the built-in features. This is a way to build modular application bundles that execute different functions, which can be managed which updated independently from the main program. In addition to the built-in PHP functionality, you can also build your own functions. A function is a series of statements that can be used in a system repeatedly. When a page is loaded a function does not run automatically.

How to Create and Invoke Functions

A user-defined function declaration begins with the word function, preceded by the name of the function that you intend to create preceded by parentheses (), and finally positions the code of the function between curly brackets {}.

Syntax :

function my_function_Name(){
// Code to be executed

Example :

PHP function

In the above example, we define function using function keyword and the myFunction() is the user defined function name followed by parentheses (). we can call the function using myFunction(); function name and statement end with a semicolon ;.