<?php
/*
By Matt Mullenweg > *photomatt.net
Inspired by Dan Benjamin > *hiveware.com/imagerotator.php
Latest version always at:
*photomatt.net/scripts/randomimage
*/// Make this the relative path to the images, like "../img" or "random/images/".
// If the images are in the same directory, leave it blank.
$folder = '';
// Space seperated list of extensions, you probably won't have to change this.
$exts = 'jpg jpeg png gif';
$files = array(); $i = -1; // Initialize some variables
if ('' == $folder) $folder = './';
$handle = opendir($folder);
$exts = explode(' ', $exts);
while (false !== ($file = readdir($handle))) {
foreach($exts as $ext) { // for each extension check the extension
if (preg_match('/\.'.$ext.'$/i', $file, $test)) { // faster than ereg, case insensitive
$files[] = $file; // it’s good
++$i;
}
}
}
closedir($handle); // We’re not using it anymore
mt_srand((double)microtime()*1000000); // seed for PHP < 4.2
$rand = mt_rand(0, $i); // $i was incremented as we went along
header('Location: '.$folder.$files[$rand]); // Voila!
?>
)
//put names of all images you want to rotate randomly
$image_set=array("img1.jpg","img2.jpg","img3.jpg","img4.jpg");
//now select any one random image
$randomly_selected_image=$image_set[array_rand($image_set,1)];
//now fetch the image and store it in a string
$image=file_get_contents("images/$randomly_selected_image");
//send a header to the browser telling it that we are now sending an image
header("Content-type: image/jpg");
//now send the image.
echo $image;
/*
Because we informed the browser earlier that we are sending an image, it could parse that string as an image.
Else it gets confused and parses it as plain text which looks horrible(with all question marks and rhombuses and weird characters-like the one when fonts are missing!)
*/<img src="randomimage.php" alt="random image" title="This image has been generated randomly and will change on refreshing">