problem with Create File dynamically in php - php

Question

I want to create File that have Full permission dynamically, that means every change for ID of session create new file .
Unfortunately I faced some problem .
Warning: fopen(test.txt) [function.fopen]: failed to open stream: Permission denied in /home/teamroom/public_html/1/3.php on line 2
Warning: fwrite(): supplied argument is not a valid stream resource in /home/teamroom/public_html/1/3.php on line 3
Warning: fclose(): supplied argument is not a valid stream resource in /home/teamroom/public_html/1/3.php on line 4
code :
<?php
session();
$member_Id=$_SESSION['user_id'];
if (isset($member_Id)){
$file = fopen("test.txt","x+");
fwrite($file,"test");
fclose($file);
}
?>
can you help me ?
or can you tell another way to do this idea ?

Answer 1

It would appear that the process PHP is running as (often the web server, e.g. www-data) does not have write permissions for the folder you're trying to create the file in
(e.g. /home/teamroom/public_html/1/).
You also should be doing error checking on the fopen() call. Then there's the security assect to think of.

Answer 2

you have no permissions to access directory. Use php-function chmod ("/somedir/somefile", 755); or change directory permissions by ftp-client.
And why are you trying to open file with x+ if you need only writing:
Modes:
r - Reading only, beginning of file
r+ - Reading and writing, beginning of file
w - Writing only, beginning of file
w+ - Writing and reading, beginning of file
a - Writing only, end of file
a+ - Writing and reading, end of file
x - Create and open for writing only, beginning of file
x+ - Create and open for reading and writing, beginning of file
If the file does not exist and you use w, w+, a or a+ it will attempt to create the file.
I think you can use w+ or a+
And for your another problem:
<?php
$fp = fopen ('/path/to/file', "r");
while (!feof ($fp))
{
$value = fgets($fp);
if(!empty($value))
{
//Here do what you want with your value
}
}
?>
This was string-by-string reading code. Also you can use file_get_contents(); php-function and work with it lika string.
P.S> Sorry for my english