安装apache2后，它可以正常工作，但是如果重新安装php5，则服务器不起作用，如果我尝试访问http://127.0.0.1给出错误500或www文件夹的文件，如果我尝试访问文件夹或文件夹的文件一切正常。错误500详细信息：
GET http://127.0.0.1/test.php
500 Internal Server Error Запрос GET /test.php HTTP/1.1 User-Agent:
Opera/9.80 (X11; Linux x86_64) Presto/2.12.388 Version/12.16 Host:
localhost Accept: text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/webp, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1 Accept-Language: ru,en;q=0.9
Accept-Encoding: gzip, deflate
Pragma: no-cache
Cache-Control: no-cache
Connection: Keep-Alive
Ответ HTTP/1.0 500 Internal Server Error
Date: Sun, 13 Oct 2013 19:16:25 GMT
Server: Apache/2.2.22 (Ubuntu)
X-Powered-By: PHP/5.4.9-4ubuntu2.3
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 20
Content-Type: text/html
不是错误500：
GET http://127.0.0.1/css/
200 OK
GET /css/ HTTP/1.1
User-Agent: Opera/9.80 (X11; Linux x86_64) Presto/2.12.388 Version/12.16
Host: localhost Accept: text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/webp, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1
Accept-Language: ru,en;q=0.9
Accept-Encoding: gzip, deflate
Connection: Keep-Alive Ответ HTTP/1.1 200 OK Date: Sun, 13 Oct 2013 19:21:38 GMT
Server: Apache/2.2.22 (Ubuntu)
Vary: Accept-Encoding
Content-Encoding: gzip Content-Length: 648 Keep-Alive: timeout=5,max=99
Content-Type: text/html;charset=UTF-8
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> [...]
您的PHP文件似乎有错误，PHP信息文件应为：
<?php phpinfo(); ?>
<?根据此https://stackoverflow.com/a/200666贬值的ID
php_info()是不正确的函数名称（除非您自己进行了编码），并且应该使用结束的分号（http://php.net/manual/en/function.phpinfo.php）
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我来说两句