注意：未定义的变量：模板和致命错误：在非对象上调用成员函数writePage（）

Question

I have a problem. When I run my site, the template error errors.

I get these two errors:

Notice: Undefined variable: template in /home/us22368/domains/******.nl/public_html/index.php on line 4 
Fatal error: Call to a member function writePage() on a non-object in /home/us22368/domains/******.nl/public_html/index.php on line 4

Some code:

index.php:

<?php
require_once('global.php');
$template->writePage('index');
$template->echoPage();
?>

My global.php includes this class (class.template.php) :

<?php
if (!class_exists('template')) {
    class template {
        public $template;
        public function writePage($pageName) {
            $file = 'app/themes/' . THEME . '/' . $pageName . '.html';
            if(!file_exists($file)) {
                die('The Page You Asked for does not exist.');
            } else {
            $this->content .= file_get_contents($file);
            }
        }
        public function echoPage() {
            echo $this->content;
        }
    }
}
?>

Is there anyone who can help me?

Answer 1

In your index.php file you have to create an instance of template class:

<?php
require_once('global.php');
$template = new template();
$template->writePage('index');
$template->echoPage();
?>

Take a look to php documentation: http://www.php.net/manual/en/language.types.object.php