php function

A function is a pace of code that can be executed multiple times in your system .When you need this block of code just call it .

Creating your first php function
you use the keyword to define the php function. you can see this in the following example :

Code:

<?php 
 function myfunction()
  {
  // function body
 } 
  

Note: Your function name can start with a letter or underscore "_", but not a number!

Using php function

here an example of using php function

Code:

<?php 
 function showme()
  {
   echo "My name is johan";
   }

 echo "Welcome to our website ";

 showme();
 
  

the output of this code :

Code:

Welcome to our website 
My name is johan

Using parameters :

Code:

<?php 
 function showme($name)
  {
   echo "My name is $name";
   }

 echo "Welcome to our website ";
 $username="johan";
 showme($username);
 showme("Tom");
  

the ouput is :

Code:

Welcome to our website 
My name is johan
My name is Tom

Return values from parameter :

Code:

<?php 
 function sum($x,$y)
  {
    $sum=$x+$y;
   return $sum;
   }

 echo " sum of 1 and 4 is :  ". sum(1,4) ;
  

the output is :

Code:

sum of 1 and 4 is : 5

Thank you

_________________
M. S. Rakha, Ph.D.
Queen's University
Canada

Author: DrRakha
Mastermind

Posts: 2715
Have thanks: 74 time

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