PHP Include - Error Fixing - php

Question

I have the following PHP code that produces an error as the include files don't exist. I have not yet made them but I want to stop errors being produced (not just hidden). Is there anything I can put into my code that says "don't record any errors if the file doesn't exist, just ignore the instruction"
<?php
$PAGE = '';
if(isset($_GET['page'])) {
$PAGE = $_GET['page'];
};
switch ($PAGE) {
case 'topic': include 'topic.php';
break;
case 'login': include 'login.php';
break;
default: include 'forum.php';
break;
};
?>

Answer 1

use file_exists() to check if your file exists or not before calling include;
if (file_exists('forum.php')) {
//echo "The file forum.php exists";
include 'forum.php';
}
//else
//{
// echo "The file forum.php does not exists";
//}

Answer 2

Include the files only if they exist. You can add a check for existing file -
switch ($PAGE) {
case 'topic':
if(file_exists(path_to_file)) {
include 'topic.php';
}
break;
......
};
file_exists()

Answer 3

You seem to be looking for # operator which silences any errors from an expression, you can read more about it here: http://php.net/manual/en/language.operators.errorcontrol.php

Answer 4

Use file_exists() function:
<?php
$PAGE = '';
if(isset($_GET['page'])) {
$PAGE = $_GET['page'];
};
switch ($PAGE) {
case 'topic':
if (file_exists("topic.php")){
include 'topic.php';
}
break;
case 'login':
if (file_exists("login.php")){
include 'login.php';
}
break;
default:
if (file_exists("forum.php")){
include 'forum.php';
}
break;
};
?>
Documentation http://php.net/manual/en/function.file-exists.php