Calling PHP functions through another file - php

Question

I created a simple sample php file for display some function outputs. here is the code..
<?php
// $printName = hello('samitha');
// $printHeader = pageHeader('main','on');
switch (key($_GET)){
case 'red':
$printHeader = pageHeader('red','on');
$printName = hello('Joel');
break;
case 'blue':
$printHeader = pageHeader('blue','off');
$printName = hello('Duck');
break;
case 'yellow':
//$printHeader = pageHeader('yellow','on');
break;
}
function hello($name){
return $name;
}
function pageHeader($header,$onoff){
if ($onoff == 'on') {
return $header."page header<br>";
}
else {return null;}
}
echo $printHeader;
echo $printName;
?>
This code is working fine without any problems.
When I call 'example.com/php/tipo34.php?red', it shows on the screen:
redpage header
Joel
And when I call 'example.com/php/tipo34.php?blue' it shows on the screen:
Duck
I tried to put the below functions inside of another php file called tipo34-req.php and received the following error:
Fatal error: Call to undefined function pageHeader() in C:\wamp\www\php\tipo34.php on line 8
The code I tried:
<?php
// $printName = hello('samitha');
// $printHeader = pageHeader('main','on');
switch (key($_GET)){
case 'red':
$printHeader = pageHeader('red','on');
$printName = hello('samitha');
break;
case 'blue':
$printHeader = pageHeader('blue','off');
$printName = hello('kalum');
break;
case 'yellow':
//$printHeader = pageHeader('yellow','on');
break;
}
include 'tipo34-req.php';
echo $printHeader;
echo $printName;
?>
tipo34-req.php code:
<?php
function hello($name){
global $name;
return $name;
}
function pageHeader($header,$onoff){ global $header, $onoff
if ($onoff == 'on') {
return $header."page header<br>";
}
else {return null;}
}
?>
How do I solve this problem? Using the function directly on the file works, but when I put the functions in another php file, it throws the error.
Thanks.

Answer 1

Include your file above its contents usage. PHP is unaware of the functions since they are included later in the code.
include 'tipo34-req.php';
switch (key($_GET)){
case 'red':
$printHeader = pageHeader('red','on');
$printName = hello('samitha');
break;
case 'blue':
$printHeader = pageHeader('blue','off');
$printName = hello('kalum');
break;
case 'yellow':
//$printHeader = pageHeader('yellow','on');
break;
}
echo $printHeader;
echo $printName;
?>

Answer 2

Have you tried including the file at the top before calling any of the functions?