PHP Functions

PHP function is a block of code that can be used many times when we need. PHP has a thousands of internal or built-in functions that we can use within our PHP scripts to perform a specific task.
A function will not execute when a page loads. It executed by a calling a function. We can create custom functions in PHP.

PHP User Defined Function

We can declare a function in php with the word “function”. Function names are NOT case-sensitive in php. function name can be start with a letter or underscore but it can be start with a number.

Syntext


function functionName() {
    code to be executed;
}

Example

PHP Function With Parameters

An Parameters is just like a variable. Information can be passed to functions through Parameters. Parameters are specified after the function name, inside the parentheses. You can add multiple Parameters as you want, just separate them with a comma.

Syntex

function myFunc($param1, $param2){
    // Code to be executed
}