What is ment by function in php

Question

What is ment by function in php. describe diffrent between

mail() function

and we make own function.

Answer 1

a function is a code that can be re-used for doing a similar process. when declaring a function we use the keyword *function* .so when a function has already been declared u can use a callback technique to initiate it...
Example:

***declaring a function ***

function mail (){
//code to run
}

******** call back technique ****

mail ();
- this runs the code within the function u declared