Php function

I am new in PhP so want to know that can I write a function in different file and how to include them
Thank's for help me

 

Create a new php file and name it what you want too, (but for this example i'll use file.php):

Then add the function into file.php like:

<?php

/*

You can read up on creating functions @:
http://php.about.com/od/learnphp/ss/php_functions_4.htm

*/

function functionname() {

//what the function does...

return;

}
?>

PHP:

Then wherever you want to include the file add:

<?php

include("file.php");

?>

PHP:

 

and in php you can add the function anywhere as its processed after the whole code is run