Functions allow programmers to reuse code and avoid repetition. They are defined by giving a name to a set of statements, which can then be called elsewhere in the program. Functions may take parameters, which are values supplied to the function that it can then use. For example, a shopping function could take a list as a parameter so that it can output instructions to buy the items on that list, with the list changing each time the function is called.

1. Functions in Php
Abdul Aziz

2. What is a Function?
Sequence of commands that can be reused
together later in a program.

3. The Reusability

4. DRY
Programmers
Keep your code
Dry.

5. The rule of programming
DRY
Do not
Repeat
Yourself

7. The Modular approach

8. The building blocks

9. Defining
Give a single name to
set of statements or
action.

10. Defining
//Defining Of a function
function FunctionName(){
// Statement 1
// Statement 2
// Statement 3
}

11. Calling
Using that defined
function. By calling
its name followed by
()

12. Calling

13. Code demo

15. Solved By
functions

16. Function Parameters

17. Function parameters
A function can take parameters which are just
values you supply to the function so that
the function can do something utilizing those
values.
FunctionName(argument_1,argument_2);

18. The Shopping
Example
function Shopping($list){
echo "
1. Make a list
2. goto market
3. Buy $list
4. Return Home
";
}
What if our
mother provides
us with the list of
items? And
every time that
list is different.

19. Function call
Now Function call will be
Shopping($list);
The name of variable which is passed while calling may be
different or same does not matter.

20. Parameters
You can have as
many parameters as
you want.

21. {Q & A}