PHP：无法从包含的文件中访问对象

Question

使用此功能我想创建一个PHP导航：

function loadPage($pagename) {
        if (!isset($pagename) || !file_exists($pagename . '.php')) {
            include FRONTPAGE . '.php';
        } else {
            include $pagename . '.php';
        }
    }

在我的索引中，我有以下内容：

require 'includes/classes/core.php';
$core = new SH_Core();

我可以访问$ core中的所有其他类，例如$ core-＆gt; database-＆gt; newConnection（）; 我也应该能够在包含的文件中使用它。但我不能：

Notice: Undefined variable: core in C:\Users\Development\Development applications\localhost\htdocs\Shuze\frontpage.php on line 4

Notice: Trying to get property of non-object in C:\Users\Development\Development applications\localhost\htdocs\Shuze\frontpage.php on line 4

Fatal error: Call to a member function newConnection() on a non-object in C:\Users\Development\Development applications\localhost\htdocs\Shuze\frontpage.php on line 4

Answer 1

您需要授予您的功能访问$ core：

function loadPage( $pageName ) {
    global $core;
    //rest of code
}

您也可以放在包含文件的顶部。或者，您可以使用超全局$ GLOBALS ['core']。