LAMP堆栈中存在PHP问题：根本没有解析PHP脚本。我在clear机器上安装了Ubuntu 13.10。。。我现在看到页面上只有清晰的HTML，但PHP标签就像文本
事实上，我有：
$/usr/sbin/apache2ctl status | grep版本
Server Version: Apache/2.4.6 (Ubuntu) PHP/5.5.3-1ubuntu2.1
$tail-n1/var/log/apache2/error.log
[Sat Dec 14 19:33:16.307184 2013] [core:notice] [pid 15457] AH00094: Command line: '/usr/sbin/apache2'
$apache2ctl-S
VirtualHost configuration:
*:80 is a NameVirtualHost
default server videosurgeon.ll (/etc/apache2/sites-enabled/vs.conf:1)
port 80 namevhost videosurgeon.ll (/etc/apache2/sites-enabled/vs.conf:1)
port 80 namevhost videosurgeon.ll (/etc/apache2/sites-enabled/vs.conf:1)
ServerRoot: "/etc/apache2"
Main DocumentRoot: "/var/www"
Main ErrorLog: "/var/log/apache2/error.log"
Mutex default: dir="/var/lock/apache2" mechanism=fcntl
Mutex mpm-accept: using_defaults
Mutex watchdog-callback: using_defaults
Mutex rewrite-map: using_defaults
PidFile: "/var/run/apache2/apache2.pid"
Define: DUMP_VHOSTS
Define: DUMP_RUN_CFG
User: name="www-data" id=33 not_used
Group: name="www-data" id=33 not_used
$apache2ctl-M | grep php
php5_module (shared)
$cat/work/VS/httpdocs/test.php
<? phpinfo(); ?>
$cat/etc/apache2/站点启用/vs.conf
<VirtualHost *:80>
ServerAdmin webmaster@localhost
ServerName videosurgeon.ll
DirectoryIndex index.php index.html index.htm
DocumentRoot /work/VS/httpdocs/
<Directory /work/VS/httpdocs/>
Options FollowSymLinks MultiViews
AllowOverride All
Order allow,deny
allow from all
</Directory>
ErrorLog /var/log/apache2/error.log
# Possible values include: debug, info, notice, warn, error, crit,alert, emerg.
LogLevel notice
CustomLog /var/log/apache2/access.log combined
</virtualHost>
$/usr/bin/php-版本
PHP 5.5.3-1ubuntu2.1 (cli) (built: Dec 12 2013 04:22:11)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2013 Zend Technologies
with Zend OPcache v7.0.3-dev, Copyright (c) 1999-2013, by Zend Technologies
UPD.1:这是我的apache2.conf：http://ge.tt/6Yd8Jj91/v/0
UPD.2:今天我尝试删除所有内容并重新安装LAMP。结果完全相同：PHP不起作用
sudo apt-get install lamp-server^
但同样有趣的是phpmyadmin运行良好。我只是将其安装为：
sudo apt-get install php5 php5-cgi phpmyadmin
事实证明，（在phpmyadmin中）有一些设置可以让它使用PHP。。。
刚刚遇到了同样的问题。您必须使用<?PHP而不是<?，或者更改以下配置：
/etc/php5/apache2/php.ini
; This directive determines whether or not PHP will recognize code between
; <? and ?> tags as PHP source which should be processed as such. It's been
; recommended for several years that you not use the short tag "short cut" and
; instead to use the full <?php and ?> tag combination. With the wide spread use
; of XML and use of these tags by other languages, the server can become easily
; confused and end up parsing the wrong code in the wrong context. But because
; this short cut has been a feature for such a long time, it's currently still
; supported for backwards compatibility, but we recommend you don't use them.
; Default Value: On
; Development Value: Off
; Production Value: Off
; http://php.net/short-open-tag
short_open_tag = On
检查httpd.conf:中是否有这些行
AddType application/x-httpd-php .php
AddType application/x-httpd-php-source .phps
还要确保您的php模块已加载：
LoadModule php5_module modules/mod_php55.so
之后，重新启动apache并清除浏览器的缓存，然后重试。
由于某些原因，默认虚拟主机默认不执行php：https://askubuntu.com/questions/407744/apache-doesnt-execute-php-files-but-makes-me-download-them
显式启用php引擎：
<IfModule mod_php5.c>
php_admin_flag engine on
</IfModule>