Custom PHP Functions

PHP Code:

<?php

echo adding_numbers();
function adding_numbers() {
$number1 = 1;
$number2 = 5;
$number3 = $number1 + $number2;
return $number3;
}

?>

Explanation

• <?php and ?>[/*]
  

If you have already studied PHP, you should know what these two tags do. They let your server and web browser know whichever code is inside of these tags, is actually PHP, the server-side coding language.

• echo adding_numbers();[/*]
  

This line of PHP code just echo-s out (displays) our function.

• function adding_numbers() {
  • $number1 = 1;[/*]
    
  • $number2 = 5;[/*]
    
  • $number3 = $number1 + $number2;[/*]
    
  • return $number3;[/*]
    
  [/*]
  
• }[/*]
  

This is our custom function. "adding_numbers" is the name of our function. We define our variables ($number1, $number2 and $number3). We return what we want to display out of our function - this is where return $number3 comes from.

All this custom function does it display the answer to 5 + 1 which is 6.