PHP: fopen() Permission denied -

i confused code:

test.php:

fopen('test.txt','a+'); 

when execute it, error:

warning: fopen(test.txt): failed open stream:      permission denied in /var/www/html/yuelu3/mobile/text.php on line 2 

test.txt:

-rwxrwxrwx. 1 jt jt     87 10月  7 20:58 test.txt 

where problem?

thanks lot!i have found problem,i use fc13,because of protect of selinux,some action denied.so, need rid of protect.

try

fopen('/path/to/file/test.txt','a+'); 

as

fopen('test.txt','a+'); 

is looking in directory