在尝试了以上所有方法都没有效果之后，考虑重新启动你的电脑。解决了我的。

今天，PHP自带一个内置的web服务器，所以不需要进一步的安装，因此呈现PHP文件用于开发使用的最简单的方法之一是:

打开一个终端，切换到包含web应用程序的源目录(它的主文件通常称为index.php)。 在这个目录中，键入php -S localhost:7777(端口号是任意选择的)。 打开web浏览器，在地址栏中输入localhost:7777，就会呈现所需的网页。

如果您已经完成了访问，那么返回您的终端并按CTRL-C关闭开发服务器。

这个信息也是通过在终端中调用php——help来给出的，进一步的信息在https://www.php.net/manual/en/features.commandline.webserver.php中给出

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。

使用Debian 10安装Apache + php7测试的最简单方法:

apt-get update -y
apt-get install apache2 php7.0 libapache2-mod-php  -y
sudo service apache2 restart

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

在我的情况下，php模块没有加载。试试这个:

检查加载了哪些模块:apache2ctl -M。查找类似php7_module (shared)的模块 如果没有列出php模块，则尝试加载与您的php版本对应的模块。在我的例子中，php包是libapache2-mod-php7.3。所以我这样做了:a2enmod php7.3，问题就解决了。