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我正在阅读 Michael Peacock 的《PHP 5 Social Networking》一书。它是关于创建社交网络的框架。它将源代码上传到服务器，创建了数据库，并且在我再次重新上传源代码之前一切正常，现在我一直收到错误消息“找不到错误 404”。据我了解，整个事情通过一个主控制器工作 - “index.php”，然后根据它应该做什么将控制传递给其他控制器。这是 index.php 代码：

<?php

session_start();

DEFINE("FRAMEWORK_PATH", dirname( __FILE__ ) ."/" );


require('registry/registry.class.php');
$registry = new Registry();
// setup our core registry objects
$registry->createAndStoreObject( 'template', 'template' );
$registry->createAndStoreObject( 'mysqldb', 'db' );
$registry->createAndStoreObject( 'authenticate', 'authenticate' );
$registry->createAndStoreObject( 'urlprocessor', 'url' );
$registry->getObject('url')->getURLData();
// database settings
include(FRAMEWORK_PATH . 'config.php');
// create a database connection
$registry->getObject('db')->newConnection( $configs['db_host_sn'], $configs['db_user_sn'], $configs['db_pass_sn'], $configs['db_name_sn']);

$registry->getObject('authenticate')->checkForAuthentication();

// store settings in our registry
$settingsSQL = "SELECT `key`, `value` FROM settings";
$registry->getObject('db')->executeQuery( $settingsSQL );
while( $setting = $registry->getObject('db')->getRows() )
{
    $registry->storeSetting( $setting['value'], $setting['key'] );
}
$registry->getObject('template')->getPage()->addTag( 'siteurl', $registry->getSetting('siteurl') );
$registry->getObject('template')->buildFromTemplates('header.tpl.php', 'main.tpl.php', 'footer.tpl.php');

$controllers = array();
$controllersSQL = "SELECT * FROM controllers WHERE active=1";
$registry->getObject('db')->executeQuery( $controllersSQL );
while( $controller = $registry->getObject('db')->getRows() )
{
    $controllers[] = $controller['controller'];
}
$controller = $registry->getObject('url')->getURLBit(0);


if( $registry->getObject('authenticate')->isLoggedIn() )
{
    $registry->getObject('template')->addTemplateBit('userbar', 'userbar_loggedin.tpl.php');
    $registry->getObject('template')->getPage()->addTag( 'username', $registry->getObject('authenticate')->getUser()->getUsername() );

}
else
{
    $registry->getObject('template')->addTemplateBit('userbar', 'userbar.tpl.php');
}


if( in_array( $controller, $controllers ) )
{

    require_once( FRAMEWORK_PATH . 'controllers/' . $controller . '/controller.php');
    $controllerInc = $controller.'controller';
    $controller = new $controllerInc( $registry, true );

}
else
{
    // default controller, or pass control to CMS type system?
}


$registry->getObject('template')->parseOutput();
print $registry->getObject('template')->getPage()->getContentToPrint();


?>

我真的不明白这是怎么回事！

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