PHP Default Argument Values Function

PHP allows you to define C++ style default argument values. In such case, if you don't pass any value to the function, it will use default argument value.

Let' see the simple example of using PHP default arguments in function.

Example 1

Output:

Hello Sonoo
Hello Ram
Hello Vimal

Since PHP 5, you can use the concept of default argument value with call by reference also.

Example 2

Output:

Greeting: Sonoo Jaiswal
Greeting: Rahul Jaiswal
Greeting: Michael Clark

Example 3

Output:

Addition is: 20
Addition is: 30
Addition is: 80