PHP Default Argument Values Function PHP

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

1. <?php  
2. function sayHello($name="Ram"){  
3. echo "Hello $name<br/>";  
4. }  
5. sayHello("Sonoo");  
6. sayHello();//passing no value  
7. sayHello("Vimal");  
8. ?>  

Output:

Example 2

1. <?php    
2. function greeting($first="Sonoo",$last="Jaiswal"){    
3. echo "Greeting: $first $last<br/>";    
4. }    
5. greeting();  
6. greeting("Rahul");  
7. greeting("Michael","Clark");  
8. ?>    

Output:

Example 3

1. <?php  
2. function add($n1=10,$n2=10){  
3. $n3=$n1+$n2;  
4. echo "Addition is: $n3<br/>";  
5. }  
6. add();  
7. add(20);  
8. add(40,40);  
9. ?>  

Output: