How to fix "permission denied" error on online server? - php

Question

I have this very simple php website, Projectx2 that I am hosting from the Zymic server because it had good ratings.
However, I am having a few unusual errors that don't happen on my locally hosted XAMPP server.
The errors are:
Warning Cannot modify header information - headers already sent by (output started at /www/zzl.org/p/r/o/projectx2/htdocs/default.php:259) in /www/zzl.org/p/r/o/projectx2/htdocs/default.php on line 295.
and:
Warning: fopen (count.txt) [function.fopen]: failed to open stream: Permission denied in /www/zzl.org/p/r/o/projectx2/htdocs/default.php on line 298
and:
Warning: fwrite(): supplied argument is not a valid stream resource in /www/zzl.org/p/r/o/projectx2/htdocs/default.php on line 299.
and:
Warning: fclose(): supplied argument is not a valid stream resource in /www/zzl.org/p/r/o/projectx2/htdocs/default.php on line 300.
Here, I have a simple counter that keeps page counts in the file count.txt, which is also on the server.
Here is my code from 290 - 302:
<?php
$fp = fopen('count.txt','r');
$count = fread($fp,filesize('count.txt'));
fclose($fp);
if(!isset($_COOKIE['count'])) {
setcookie('count'); // 295
$count++;
}
$fp = fopen('count.txt','w'); // 298
fwrite($fp,$count); // 299
fclose($fp); // 300
echo "<div id='hitcount'>$count views</div>";
?>
I don't know why this is happening - I know very little about I/O in PHP, but I know some in Java. Can you please explain to me the problems in this code, and why it only works on a regular server?
Or maybe, is it just the Zymic server?
Tell me if I need to reveal more information or code.
thanks.

Answer 1

One by one:
Cannot modify header information - headers already sent: indicates that the PHP script is attempting to modify the HTTP headers after it has already started emitting the page. I can't give any more information because you haven't posted the relevant code.
Permission denied means the web server user does not have permission to access the file in the way that you wish. Talk to your hosting company about how you grant that permission. All the subsequent errors flow from this problem.
critique my website design: No - this site is about focussed questions on software development, not opinions on layout or colour schemes.

Answer 2

Use a FTP client like FileZilla to connect to your your website and then find the file count.txt and right click and then -> properties and set the permission to 0777