PHP create files with wrong permission

Question

I have a php files, name image_creat.php

$res = mysql_query("select * from images where key!='en' Order By id DESC LIMIT 0,10");
while ($rows = mysql_fetch_array($result)) 
{
$imageurl =  dirname(__FILE__) . '/../images/';
$width = $row['width'];
$height = $row['height'];
$source_image = @imagecreatefromjpeg($row['image']);
$desired_width = '800';
$desired_height = floor($height*($desired_width/$width));
$virtual_image = @imagecreatetruecolor($desired_width,$desired_height);
@imagecopyresized($virtual_image,$source_image,0,0,0,0,$desired_width,$desired_height,$width,$height);
@imagejpeg($virtual_image,$imageurl,'100');
}

I use SSH to setting the permission for it:

chmod 0755 /var/www/html/php/image_creat.php
chown root:root /var/www/html/php/image_creat.php

Then also setting permission for the images folder:

chmod 0755 /var/www/html/php/images/

But after the php script create jpeg files, I find all the files with permission of 644, so that my browser refused to visit it. where is the problem? Thanks.

Answer 1

I find all the files with permission of 644, so that my browser refused to visit it

Then either you're not telling us the whole story or your facts are mis-reported.

644 means -rw-r--r-- and since the creating script is only executable for root, the output ile will be owned by root. The file is readable by all users (including the webserver uid).

I suggest you go read up on Unix file permissions.

There might be lots of reasons why the file is not readable by the webserver uid - top of the list would be directory permissions (but if all the dirs above are 0755 - drwxr-xr-x - then that's not the cause) and ACLs.

BTW using the root account for routine data maintenance is a very bad idea.