重新安装mcrypt模块对我有用。

$sudo apt-get install php5-mcrypt
$sudo php5enmod mcrypt

我在Ubuntu上运行Apache，我的问题是/etc/apache2/mods-available/php5.conf文件缺少这个:

<FilesMatch ".+\.ph(p[345]?|t|tml)$">
    SetHandler application/x-httpd-php
</FilesMatch>

我把它添加回来，php正确地解析php文件。

我认为问题是，它显示的代码而不是结果是，它不会去本地主机。重新检查你要去的地址。是到本地文件目录还是到本地主机。

从你发送的屏幕截图，它将到你的计算机，而不是到本地主机。

"file:/// "应该是"localhost/"

听起来你的配置好像有问题，下面是一些你可以检查的东西:

Make sure that PHP is installed and running correctly. This may sound silly, but you never know. An easy way to check is to run php -v from a command line and see if returns version information or any errors. Make sure that the PHP module is listed and uncommented inside of your Apache's httpd.conf This should be something like LoadModule php5_module "c:/php/php5apache2_2.dll" in the file. Search for LoadModule php, and make sure that there is no comment (;) in front of it. Make sure that Apache's httpd.conf file has the PHP MIME type in it. This should be something like AddType application/x-httpd-php .php. This tells Apache to run .php files as PHP. Search for AddType, and then make sure there is an entry for PHP, and that it is uncommented. Make sure your file has the .php extension on it, or whichever extension specified in the MIME definition in point #3, otherwise it will not be executed as PHP. Make sure you are not using short tags in the PHP file (<?), these are not enabled on all servers by default and their use is discouraged. Use <?php instead (or enable short tags in your php.ini with short_open_tag=On if you have code that relies on them). Make sure you are accessing your file over your webserver using an URL like http://localhost/file.php not via local file access file://localhost/www/file.php

最后，查看PHP手册以获得更多的设置技巧。

检查你为php安装的所有包，使用:

yum list installed | grep remi

在你的机器上安装所有相关的php包，尤其是php-devel。

我也遇到过类似的问题，但我的解决方法不同。 存放PHP代码的文件名为somename。html 把它改为" someename .php"工作得很好