Show random image

[Daniel]

Someone asked for a script that would show a random image, only took a few minutes to write, so I thought I might as well share it here.

<?php

/**
 * Danltn | http://danltn.com/
 * No warranty is given to code used.
 * I'm scared of lawsuits.
 */

$images = array();

$images[] = 'http://www.escapistmagazine.com/global/media/images/articles/folder/120/zeropunctuation_logo.png';
$images[] = 'http://www.google.com/images/experimental.gif';
$images[] = 'http://www.w3.org/2001/tag/2007/05/TagThursDiagram1.JPG';

// Add as many as you like here.

$image = $images[rand(0, count($images) - 1)];
// Get random image.

switch (strtolower(substr($image, -4, 4)))
{
    case "jpeg":
    case ".jpg":
        $ctype = "image/jpg";
        break;
    case ".gif":
        $ctype = "image/gif";
        break;
    case ".png":
        $ctype = "image/png";
        break;
}
// Find the content type, based on the last 4 characters, I could add GDLib here, but I haven't, this was a quick script.

$file = @file_get_contents($image);
// Get the file

if ($file)
{
	// Only if the file has successfully been 'grabbed'.
    $len = strlen($file);
    // Get the length to be kind to the browser.
    if (!headers_sent())
    {
        header("Pragma: public");
        header("Expires: 0");
        header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
        header("Cache-Control: public");
        // Set headers.
        header("Content-Type: $ctype");
        // Set content type as correct image.
        header("Content-Length: " . $len);
        // Be kind to the browser by saying the length.

        echo $file;
        // If it all checks out, send the image.
    }
}

?>