尽管有777个权限，php仍无法打开或写入文件

我的php脚本无法写入文件777权限. 我要写的文件是mash.xml

My php script is unable to write a file despide 777 permission. the file i want to write is mash.xml

-rwxrwxrwx. 1 root root   459 May 16  2010 config.xml
-rwxrwxrwx. 1 root root   323 May 16  2010 handler.xml
-rwxrwxrwx. 1 root root 13908 Mar 15 12:18 mash.xml
-rwxrwxrwx. 1 root root   494 May 17  2010 media_audio.xml
-rwxrwxrwx. 1 root root 13967 Feb 15 07:40 media_effect.xml
-rwxrwxrwx. 1 root root   312 May 16  2010 source.xml

我检查了以下问题: -与文件上传器相同的用户var_dump(get_current_user());显示根"

i checked the following issue : - same user as file uploader, var_dump(get_current_user()); displays "root"

这是Apache日志:

this is apache log :

[error] [client 155.132.8.52] PHP Warning:  
fopen(/var/www/html/moviemasher_3-1-04/example/save/media/xml/mash.xml): 
failed to open stream: 
Permission denied in /var/www/html/moviemasher_3-1-04/example/save/media/php/save.php 
on line 14

感谢您的帮助