Home / Core PHP / PHP 5 Functions

PHP 5 Functions

The real power of PHP comes from its functions; it has more than 1000 built-in functions.

PHP User Defined Functions
Besides the built-in PHP functions, we can create our own functions.

A function is a block of statements that can be used repeatedly in a program.

A function will not execute immediately when a page loads.

A function will be executed by a call to the function.

Create a User Defined Function in PHP
A user defined function declaration starts with the word “function”:

Syntax

function functionName() {
code to be executed;
}
Note: A function name can start with a letter or underscore (not a number).

Tip: Give the function a name that reflects what the function does!

Note Function names are NOT case-sensitive.
In the example below, we create a function named “writeMsg()”. The opening curly brace ( { ) indicates the beginning of the function code and the closing curly brace ( } ) indicates the end of the function. The function outputs “Hello world!”. To call the function, just write its name:

Example

Select Code
<?php
function writeMsg() {
  echo "Hello world!";
}

writeMsg(); // call the function
?>

About v.shakya

I am V.Shakya, Freelance PHP Programmer. I like to share my ideas, views and knowledge to all of you who come across my website. I am young, enthusiastic, highly motivated and self disciplined person. I completed my studies in Master of Computer Application and currently giving my technical expertise to one of the Big IT company. I have more than Ten years of experience in vast field of Programming , Designing and Development of websites and various software's.

Check Also

PHP 5 Arrays

An array stores multiple values in one single variable: Example <?php $cars=array("Volvo","BMW","Toyota"); echo "I like …

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Please fill in the form and submit to subscribe

Welcome to VShakya

For this week my all price is very low !

Don't miss to get my services

Thanks

 

Contact us