Sig rotator?

G-MAN2004 · 11 Oct 2009 at 23:43

Whatever happened to that sig rotating website generously set up by someone on here?

I can't find it.

Lethal` · 11 Oct 2009 at 23:46

http://sigrotor.com/

silversurfer · 11 Oct 2009 at 23:52

Whose that built by, thanks

G-MAN2004 · 11 Oct 2009 at 23:58

Lethal` said:
http://sigrotor.com/

Ah thanks. I was trying sigrotator.com

Azza · 11 Oct 2009 at 23:59

Always wondered how people did it.

Thanks for that Lethal` and G-MAN2004 for bringing it up.

mrk · 12 Oct 2009 at 00:16

If you have your own webhosting the you can rotate on any forum using a rotate.php file.

Code:

<?php

$folder = '';

$exts = 'jpg jpeg png gif';

$files = array(); $i = -1;
if ('' == $folder) $folder = './';

$handle = opendir($folder);
$exts = explode(' ', $exts);
while (false !== ($file = readdir($handle))) {
    foreach($exts as $ext) {
        if (preg_match('/\.'.$ext.'$/i', $file, $test)) {
            $files[] = $file;
            ++$i;
            }
        }
    }
closedir($handle);
mt_srand((double)microtime()*1000000);
$rand = mt_rand(0, $i);

header('Location: '.$folder.$files[$rand]);
?>

Then just put your image files along with that as rotate.php in your folder on your web space and link to rotate.php as an image.

Easy...

Inquisitor · 12 Oct 2009 at 00:34

silversurfer said:
Whose that built by, thanks

Me!

I should really update it though – the code's getting very dated and it doesn't need the OcUK restriction on it any more.

Inquisitor · 12 Oct 2009 at 00:46

mrk said:
If you have your own webhosting the you can rotate on any forum using a rotate.php file.

Code:

<?php $folder = ''; $exts = 'jpg jpeg png gif'; $files = array(); $i = -1; if ('' == $folder) $folder = './'; $handle = opendir($folder); $exts = explode(' ', $exts); while (false !== ($file = readdir($handle))) { foreach($exts as $ext) { if (preg_match('/\.'.$ext.'$/i', $file, $test)) { $files[] = $file; ++$i; } } } closedir($handle); mt_srand((double)microtime()*1000000); $rand = mt_rand(0, $i); header('Location: '.$folder.$files[$rand]); ?>

Then just put your image files along with that as rotate.php in your folder on your web space and link to rotate.php as an image.

Easy...

Or you could do it in a couple of lines:

PHP:

$images = glob("{*.jpg,*.JPG,*.jpeg,*.JPEG,*.png,*.PNG}", GLOB_BRACE);
readfile($images[array_rand($images)]);

V4NT0M · 12 Oct 2009 at 00:52

Make sure you've got some good sigs to rotate.

dekez · 12 Oct 2009 at 00:54

Always wondered who we had to thank for Sigrotor, I don't understand it, but I like it!

Thanks for setting up a great little rotor site

G-MAN2004 · 12 Oct 2009 at 00:56

Inquisitor said:
Me!

Thanks.

GreatAuk · 12 Oct 2009 at 01:30

Skyfall said:
Make sure you've got some good sigs to rotate.

I can see you take that advice to heart... awesome set of sigs Skyfall

mrk · 12 Oct 2009 at 01:30

Inquisitor said:
Or you could do it in a couple of lines:

PHP:

$images = glob("{*.jpg,*.JPG,*.jpeg,*.JPEG,*.png,*.PNG}", GLOB_BRACE); readfile($images[array_rand($images)]);

Aha!

rotate.php:

rotate2.php:

Feek · 2026-03-13T14:52:20+0000

mrk said:
If you have your own webhosting the you can rotate on any forum using a rotate.php file.

Massive thread bump because I've built one of these.

You could use this php, or the next one mentioned, but there's always the chance that it'll serve the same one multiple times in a row.

This is what I'm using:

Code:

<?php
declare(strict_types=1);

$imageDir  = __DIR__ . '/sigs';
$stateFile = __DIR__ . '/sig_last.txt';

$allowedExt = ['jpg', 'jpeg', 'png', 'gif', 'webp'];

$files = [];
foreach ($allowedExt as $ext) {
    foreach (glob($imageDir . '/*.' . $ext) as $path) {
        if (is_file($path) && is_readable($path)) {
            $files[] = $path;
        }
    }
}

if (!$files) {
    http_response_code(404);
    header('Content-Type: text/plain; charset=UTF-8');
    echo "No signature images found in {$imageDir}.";
    exit;
}

$choice = $files[random_int(0, count($files) - 1)];

$fp = @fopen($stateFile, 'c+');
if ($fp && flock($fp, LOCK_EX)) {
    rewind($fp);
    $last = trim((string)stream_get_contents($fp));

    if (count($files) > 1 && $last !== '') {
        $pool = [];
        foreach ($files as $path) {
            if (basename($path) !== $last) {
                $pool[] = $path;
            }
        }
        if ($pool) {
            $choice = $pool[random_int(0, count($pool) - 1)];
        }
    }

    ftruncate($fp, 0);
    rewind($fp);
    fwrite($fp, basename($choice) . "\n");
    fflush($fp);

    flock($fp, LOCK_UN);
    fclose($fp);
} elseif ($fp) {
    fclose($fp);
}

$mime = 'application/octet-stream';
if (function_exists('finfo_open')) {
    $finfo = finfo_open(FILEINFO_MIME_TYPE);
    if ($finfo) {
        $detected = finfo_file($finfo, $choice);
        if (is_string($detected) && $detected !== '') {
            $mime = $detected;
        }
        finfo_close($finfo);
    }
}

header('Content-Type: ' . $mime);
header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
header('Cache-Control: post-check=0, pre-check=0', false);
header('Pragma: no-cache');
header('Expires: 0');
header('X-Sig-Nonce: ' . bin2hex(random_bytes(8)));

$size = filesize($choice);
if ($size !== false) {
    header('Content-Length: ' . $size);
}

if ($_SERVER['REQUEST_METHOD'] === 'HEAD') {
    exit;
}

readfile($choice);

It's a bit longer, but it never serves the same image twice in a row and it makes the effort to stop any caching. It's not perfect and if a few people are refreshing at the same time, there's a chance they might see repeats due to other views, but it works well.

Chuck it in your own hosting, create a directory below it called 'sigs' and put your images in there. Then call the php in

[ img ] tags in your signature.

Werewolf · 2026-03-13T20:20:14+0000

Is that the one you use to keep your kylie sigs spinning around? :km:

Azza · 2026-03-13T22:28:42+0000

Feek said:

Massive thread bump because I've built one of these.

You could use this php, or the next one mentioned, but there's always the chance that it'll serve the same one multiple times in a row.

This is what I'm using:

Code:

<?php
declare(strict_types=1);

$imageDir  = __DIR__ . '/sigs';
$stateFile = __DIR__ . '/sig_last.txt';

$allowedExt = ['jpg', 'jpeg', 'png', 'gif', 'webp'];

$files = [];
foreach ($allowedExt as $ext) {
    foreach (glob($imageDir . '/*.' . $ext) as $path) {
        if (is_file($path) && is_readable($path)) {
            $files[] = $path;
        }
    }
}

if (!$files) {
    http_response_code(404);
    header('Content-Type: text/plain; charset=UTF-8');
    echo "No signature images found in {$imageDir}.";
    exit;
}

$choice = $files[random_int(0, count($files) - 1)];

$fp = @fopen($stateFile, 'c+');
if ($fp && flock($fp, LOCK_EX)) {
    rewind($fp);
    $last = trim((string)stream_get_contents($fp));

    if (count($files) > 1 && $last !== '') {
        $pool = [];
        foreach ($files as $path) {
            if (basename($path) !== $last) {
                $pool[] = $path;
            }
        }
        if ($pool) {
            $choice = $pool[random_int(0, count($pool) - 1)];
        }
    }

    ftruncate($fp, 0);
    rewind($fp);
    fwrite($fp, basename($choice) . "\n");
    fflush($fp);

    flock($fp, LOCK_UN);
    fclose($fp);
} elseif ($fp) {
    fclose($fp);
}

$mime = 'application/octet-stream';
if (function_exists('finfo_open')) {
    $finfo = finfo_open(FILEINFO_MIME_TYPE);
    if ($finfo) {
        $detected = finfo_file($finfo, $choice);
        if (is_string($detected) && $detected !== '') {
            $mime = $detected;
        }
        finfo_close($finfo);
    }
}

header('Content-Type: ' . $mime);
header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
header('Cache-Control: post-check=0, pre-check=0', false);
header('Pragma: no-cache');
header('Expires: 0');
header('X-Sig-Nonce: ' . bin2hex(random_bytes(8)));

$size = filesize($choice);
if ($size !== false) {
    header('Content-Length: ' . $size);
}

if ($_SERVER['REQUEST_METHOD'] === 'HEAD') {
    exit;
}

readfile($choice);

It's a bit longer, but it never serves the same image twice in a row and it makes the effort to stop any caching. It's not perfect and if a few people are refreshing at the same time, there's a chance they might see repeats due to other views, but it works well.

Chuck it in your own hosting, create a directory below it called 'sigs' and put your images in there. Then call the php in

[ img ] tags in your signature.

I vibe coded a Cloudflare worker for mine. The worker serves an endpoint which returns a 302 redirect to one of configured images. It automatically cycles through the images based on a configurable time interval, At the moment it's every 30 minutes, so everyone sees the same sig image at the same time.