Dynamic Signatures/Footers

[Kevvv]

Hi, on some forums such as vBulletin users can have a dynmamic footer that changes every time a page is refreshed using a php script... well i was jsut woundering, if

a) it can be done on YaBB and
b) how do i do it  

thanks.

[Chris Cromer]

It isn't related to the forum software... you can use those things on ANY forum, not just vbulletin.

For instance I have a random avatar here.

All you do is write a script that outputs the images data. Then link to it either in the avatar field or by putting:

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[img]image_url_here[/img]

into the signature.

[Kevvv]

hi could you pls help me on this matter... what kind of script that outputs image data?

[Chris Cromer]

You just fopen(); the image, use fread(); on it. Then print what is returned from fread();

If you don't know php... then you probably don't have any idea what I just said.

You could try looking for a random image script somewhere... but this is generally what they do.

[Kevvv]

yup that just confused me.

[Chris Cromer]

Well let's just go with the basics first...

This script is a basic script to display an image:

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<?php
$file = fopen('image.gif','wb');
$data = fread($file,filesize('image.gif'));
fclose($file);
die($data);
?>

It isn't random but it does show you the basics of displaying an image.

Then you just get some code to open a different image file at random and boom you have what your looking for.

[Kevvv]

thanks alot for your help  

[Kevvv]

heylo again ive been searching all day found loads of scripts but all kind of confused me.. i dont supose i could check out your script  

[Chris Cromer]

My script is kind of overkill... 175 lines, and 4kb big... it has extra features that most people wouldn't need.

Just look around there used to be some random avatar/sig scripts posted somewhere around here.

[Kevvv]

i find disscousion on it but no help

[Shadow's Pawn]

Here is a freeware script that should do what you need
Save this as a file called random.php or anything like that.

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<?php
//////////////////////////////////////////////////////////////////////
/*                  Suho1004's PHP Sig Rotator V2.0                 */
/*                                                                  */
/* This script takes an inventory of all image files in a directory */
/* and displays one at random. All you need to do is save this code */
/* in a directory that contains your images (name it what you will, */
/* but make sure it has a ".php" extension). Then just link to this */
/* script to get your random image.                                 */
/*                                                                  */
/* I would recommend naming this file "index.php," and then you can */
/* just link to the directory itself (like I do in my example).     */
/*                                                                  */
/* Once you've read these instructions, feel free to delete them to */
/* cut down on the file size. I claim no rights to this code, which */
/* means you can do whatever you like with it. Have fun. :-)        */
/*                                                                  */
/* Thanks to TP for the gentle nudging...                           */
//////////////////////////////////////////////////////////////////////

if ($dir = opendir("."))
{
     $list = buildimagearray($dir);
     displayrandomimage($list);
}

// This function reads all the files in the current directory and adds all image files to the array $list[]
function buildimagearray($dir)
{
     while (false !== ($file = readdir($dir)))
     {
          if (!is_dir($file) && getimagesize($file))
          {
               $list[] = $file;
          }
     }
     return $list;
}

// This function selects a random image, determines the mime type, opens the file for reading,
// and then outputs the image
function displayrandomimage($list)
{
     srand ((double) microtime() * 10000000);
     $sig = array_rand ($list);

     $size = getimagesize ($list[$sig]);
     $fp = fopen($list[$sig], "rb");

     if ($size && $fp)
     {
          header("Content-type: {$size['mime']}");
          fpassthru($fp);
          exit;
     }
}
?>


[Kevvv]

okay thanks. so i how do it tell it which images to pick:?

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if ($dir = opendir("http://servername.com/pictures/"))

is that correct?

and also ive been reading about .htaccess do i need to do anything with that?

[Chris Cromer]

You don't need to edit that script to get it to work.

Just copy that code and paste into into a file and name it random.php.

Then just put the images in the same directory as that random.php file.

[Kevvv]

ahh nice sorry i was thinking it was more complex than it really was, cheers.

[HyperDev]

Note about all of this: IPB forums won't accept .php as an image suffix. You can solve this with .htaccess. Just have a .jpg (or whatever) processed through PHP's engine, and name your script ***.jpg (or whatever).