php - How to keep users from viewing images by URL? -

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imagine have image file secretimage.png on webspace , want several users have right access image on index.php. can done:

// index.php if($userisallowed) echo '<img src="secretimage.png" />';

the problem is, users theoretically still access image browsing directly www.mydomain.com/secretimage.png. there way prevent them doing so, image can viewed inside index.php?

you can use htaccess route requests specific folder through .php file. in file, can determine whether user can see file or not... if so, deliver correct headers , image. if not, show whatever want (404, placeholder image).


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