我目前正在TeamTreehouse.com上了解Slim框架，并遇到了一个我无法解决的问题。
在项目的这一点上，我们已经通过Composer安装了Slim，并在我们的文档根目录中设置了.htaccess和index.php文件（在我的计算机上是/ home / daniel / src / public_html / treehouse / build_websites_php /）。 在模板文件夹中，我们有index.html和contact.html。这是文件夹的布局。
在index.php中，我实例化一个新的Slim对象：
$app = new \Slim\Slim();
然后调用get（）方法，然后调用render（）以在url分别为localhost / treehouse / build_websites /和localhost / treehouse / build_websites / contact时呈现index.html和contact.html页面。 / p>
$app->get('/', function () use($app) {
$app->render('index.html');
});
$app->get('/contact', function () use($app) {
$app->render('contact.html');
});
然后运行应用程序：
$app->run();
我的index.html页面显示正常，但是当我尝试访问/ contact url时，我收到404错误（不是通过Slim，只是服务器的默认值）。以下是我系统的一些规格：
我的/ home / daniel / src / public_html /目录中的任何内容都可以被Apache访问，因为我在过去的一年里从那里运行了PHP脚本。
我已经尝试了here的建议（并在每次更新到conf.d或其他文件后重新启动服务器）并且没有运气。
任何帮助都会非常感激，我只使用PHP / Ubuntu / Apache大约一年，所以我可能错过了一些明显的东西！
这是 index.php 文件：
<?php
require 'vendor/autoload.php';
$app = new \Slim\Slim();
$app->get('/', function () use($app) {
/* When using render(), the url localhost/treehouse/build_websites_php/ to
gets you the home page. */
$app->render('index.html');
});
/* This SHOULD bring up the contact page at url
localhost/treehouse/build_websites_php/contact, but it doesn't! */
$app->get('/contact', function () use($app) {
$app->render('contact.html');
});
$app->run();
?>
以下是 .htacess 文件：
RewriteEngine On
# Some hosts may require you to use the `RewriteBase` directive.
# If you need to use the `RewriteBase` directive, it should be the
# absolute physical path to the directory that contains this htaccess file.
#
# RewriteBase /home/daniel/src/public_html/treehouse/build_websites_php/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^ index.php [QSA,L]
以下是Apache的各种conf.d文件：
/etc/apache2/apache2.conf中
# Sets the default security model of the Apache2 HTTPD server. It does
# not allow access to the root filesystem outside of /usr/share and /var/www.
# The former is used by web applications packaged in Debian,
# the latter may be used for local directories served by the web server. If
# your system is serving content from a sub-directory in /srv you must allow
# access here, or in any related virtual host.
<Directory />
Options FollowSymLinks
AllowOverride None
Require all denied
</Directory>
<Directory /usr/share>
AllowOverride None
Require all granted
</Directory>
<Directory /home/daniel/src/public_html>
Order allow,deny
Allow from all
Require all granted
</Directory>
我尝试将AllowOverride All作为建议here添加到最后一个指令，然后我根本无法从服务器访问PHP文件并得到500错误而不是404错误。
/etc/apache2/sites-available/000-default.conf
<VirtualHost *:80>
# The ServerName directive sets the request scheme, hostname and port that
# the server uses to identify itself. This is used when creating
# redirection URLs. In the context of virtual hosts, the ServerName
# specifies what hostname must appear in the request's Host: header to
# match this virtual host. For the default virtual host (this file) this
# value is not decisive as it is used as a last resort host regardless.
# However, you must set it for any further virtual host explicitly.
#ServerName www.example.com
ServerAdmin webmaster@localhost
DocumentRoot /var/www/html
# Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
# error, crit, alert, emerg.
# It is also possible to configure the loglevel for particular
# modules, e.g.
#LogLevel info ssl:warn
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
# For most configuration files from conf-available/, which are
# enabled or disabled at a global level, it is possible to
# include a line for only one particular virtual host. For example the
# following line enables the CGI configuration for this host only
# after it has been globally disabled with "a2disconf".
#Include conf-available/serve-cgi-bin.conf
</VirtualHost>
# vim: syntax=apache ts=4 sw=4 sts=4 sr noet
/etc/apache2/sites-available/mysite.conf
<VirtualHost *:80>
# The ServerName directive sets the request scheme, hostname and port that
# the server uses to identify itself. This is used when creating
# redirection URLs. In the context of virtual hosts, the ServerName
# specifies what hostname must appear in the request's Host: header to
# match this virtual host. For the default virtual host (this file) this
# value is not decisive as it is used as a last resort host regardless.
# However, you must set it for any further virtual host explicitly.
#ServerName www.example.com
ServerAdmin webmaster@localhost
DocumentRoot /home/daniel/src/public_html
# Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
# error, crit, alert, emerg.
# It is also possible to configure the loglevel for particular
# modules, e.g.
#LogLevel info ssl:warn
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
# For most configuration files from conf-available/, which are
# enabled or disabled at a global level, it is possible to
# include a line for only one particular virtual host. For example the
# following line enables the CGI configuration for this host only
# after it has been globally disabled with "a2disconf".
#Include conf-available/serve-cgi-bin.conf
</VirtualHost>
# vim: syntax=apache ts=4 sw=4 sts=4 sr noet
答案 0 :(得分：0)
看起来您的Apache设置不允许.htaccess文件覆盖任何设置。将以下内容添加到apache2.conf。
<Directory /home/daniel/src/public_html>
AllowOverride All
Order allow,deny
Allow from all
Require all granted
</Directory>
答案 1 :(得分：0)
好的哇，我终于明白了，感谢Mika指出我正确的方向。事实证明，我的/etc/apache2/sites-available/mysite.conf文件需要以下指令：
<Directory /home/daniel/src/public_html >
AllowOverride All
</Directory>
除了其他指令之外，我曾尝试将该指令添加到/etc/apache2/apache2.conf：
<Directory />
Options FollowSymLinks
AllowOverride None
Require all denied
</Directory>
<Directory /usr/share>
AllowOverride None
Require all granted
</Directory>
<Directory /home/daniel/src/public_html>
Order allow,deny
Allow from all
Require all granted
AllowOverride All #THIS DIDN'T WORK
</Directory>
但是来自上面的AllowOverride All来自服务器的500错误。显然，它必须是/etc/apache2/sites-available/mysite.conf文件本身，谁知道！
我还运行sudo a2enmod rewrite && sudo /etc/init.d/apache2 restart以确保在发现此错误消息后加载了mod_rewrite（感谢Mika指出检查日志文件！）：
[Sun Nov 13 10:37:51.054347 2016] [core:alert] [pid 10979] [client ::1:51900] /home/daniel/src/public_html /treehouse/build_websites_php/.htaccess: Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included in the server configuration
我在添加AllowOverride All指令之前就这样做了，所以我不确定它是否在解决问题方面起了作用，但我想我会为任何感兴趣的人记录它。
这些网站提供了有关如何最终解决问题的宝贵信息：