TIP: Random Image script

[Mop (Gb)]

How to create a script that, when accessed as an image, generates a random image every time its loaded:

1: Create a php file like this:

Code:

<?php
// Directory of images
$folder = 'images/';

// Do not edit any code below!
srand( time() );
if ($directory = @opendir($folder))
{     
while (($image = readdir($directory)) !== false)     
{         
if ( eregi( '.(png|gif)$', $image) )         
{             
$images[] = $image;         
}     
}
closedir($directory);
}
$image = $images[rand() % sizeof( $images )];
if ( eregi( '.png$', $image ))
{     
header("Content-Type: image/png");
}
else
{     
header("Content-Type: image/gif");
}
header("Content-Length: " . filesize( $folder."/".$image ) );
readfile( $folder."/".$image );
?>

2: Save this file on your server, in a folder named 'random' (Or whatever name you want)

3: In the folder the Php file is in, create another folder and name it 'images' (You can name it something else, but in the script change the $folder variable to the name / path you use).  In this folder put all the .png / .gif images you want in the randomizer.

4: To put the random image on your site:

Code:

<image src="PATH TO PHP FILE">

Or as a sig on a forum:

Code:

[img]URL OF PHP FILE[/img]

Example of it:


(Refresh the page to change)

Enjoy!
 

Note: This script above is for .gif and .png images ONLY! You can change it to other formats by changeing all instances of 'gif' or 'png' to whatever format you want. (But who would want to, png and gif are the best formats anyway)

Note yet again: Some (bad) browers will show the image as not available. I know it works for sure on Safari / Firefox on Mac OsX, and beleive it works on Firefox for Windows. Also, I know it doesn't work on IE for Mac OsX. Not sure about other browers / systems.

[EnockNamun]

Mop, the scriptMASTER, is there a way to make this to where the image changes randomly every few seconds, without refreshing the page?  and can i even use php in a new 110mb account for my fansite/hobby page? (just for fun, so i don't really want to pay for this one)

[inp o҉rtb]

Good shiz, Mop. Yo, you can use glob() instead of readdir(). Check it out ;]

Code:

if ($directory = @opendir($folder))
{     
while (($image = readdir($directory)) !== false)     
{         
if ( eregi( '.(png|gif)$', $image) )         
{             
$images[] = $image;         
}     
}
closedir($directory);
}

becomes

Code:

$images = array_merge(glob($folder."*.png"),glob($folder."*.gif"));

is there a way to make this to where the image changes randomly every few seconds, without refreshing the page?

Absolutely, using Javascript. Any clientside interaction/effect must be mediated using clientside technology. I'll let Mop do the actual coding because I'm too lazy ;]

can i even use php in a new 110mb account for my fansite/hobby page?

Absolutely. PHP is free.

[Mop (Gb)]

Woah, this is so old, I don't even remember posting it Lol.

[Piotr GRD]

Small improvements, if you don't mind, Mop.

Code:

<?php
// Directory of images
$folder = 'images/';
// put all images in this folder, it can be .gif .png .jpg .jpeg

// Do not edit any code below!
if ($directory = @opendir($folder))
{
   while (($image = readdir($directory)) !== false)
   {
      if (eregi(".(png|gif|jpg|jpeg)$", $image))
      { $images[] = $image; }
   }
   closedir($directory);

   $image = $folder . $images[mt_rand(0, (count($images) - 1))];
   $ext = pathinfo($image, PATHINFO_EXTENSION);
   $type = array('jpg' => 'image/jpeg', 'jpeg' => 'image/jpeg', 'gif' => 'image/gif', 'png' => 'image/png');
   
   header('Content-Type: ' . $type[$ext]);
   header('Content-Length: ' . filesize($image));
   readfile($image);
}
else
{ echo 'Can not open image directory'; }
?>

I am using little different script, but similar, for my new avatar
And AFTER creating it I just found this post. So I mixed Mop's and mine codes a little bit.

http://grd.110mb.com/pic/?avatar.jpg

[d3xt3r]

Small improvements, if you don't mind, Mop.

Code:

<?php
// Directory of images
$folder = 'images/';
// put all images in this folder, it can be .gif .png .jpg .jpeg

// Do not edit any code below!
if ($directory = @opendir($folder))
{
   while (($image = readdir($directory)) !== false)
   {
      if (eregi(".(png|gif|jpg|jpeg)$", $image))
      { $images[] = $image; }
   }
   closedir($directory);

   $image = $folder . $images[mt_rand(0, (count($images) - 1))];
   $ext = pathinfo($image, PATHINFO_EXTENSION);
   $type = array('jpg' => 'image/jpeg', 'jpeg' => 'image/jpeg', 'gif' => 'image/gif', 'png' => 'image/png');
   
   header('Content-Type: ' . $type[$ext]);
   header('Content-Length: ' . filesize($image));
   readfile($image);
}
else
{ echo 'Can not open image directory'; }
?>

I am using little different script, but similar, for my new avatar
And AFTER creating it I just found this post. So I mixed Mop's and mine codes a little bit.

http://grd.110mb.com/pic/?avatar.jpg

I like your version. This is exactly something I wanted to do a while back but never did it. Now I don't have to write the code. Awesome. Thanks.