Codice PHP:
$folder = '.';
$extList = array();
$extList['gif'] = 'image/gif';
$extList['jpg'] = 'image/jpeg';
$extList['jpeg'] = 'image/jpeg';
$extList['png'] = 'image/png';
$img = null;
if (substr($folder, -1) != '/')
{
$folder = $folder . '/';
}
if (isset($_GET['img']))
{
$imageInfo = pathinfo($_GET['img']);
if ( isset($extList[strtolower($imageInfo['extension'])]) && file_exists($folder . $imageInfo['basename']) )
{
$img = $folder . $imageInfo['basename'];
}
}
else
{
$fileList = array();
$handle = opendir($folder);
while ( false !== ($file = readdir($handle)) )
{
$file_info = pathinfo($file);
if ( isset($extList[strtolower($file_info['extension'])]))
{
$fileList[] = $file;
}
}
closedir($handle);
if (count($fileList) > 0)
{
$imageNumber = time() % count($fileList);
$img = $folder . $fileList[$imageNumber];
}
}
if ($img != null)
{
$imageInfo = pathinfo($img);
$contentType = 'Content-type: ' . $extList[$imageInfo['extension']];
header ($contentType);
readfile($img);
}
else
{
if (function_exists('imagecreate'))
{
header("Content-type: image/png");
$im = @imagecreate(100, 100) or die("Cannot initialize new GD image stream");
$background_color = imagecolorallocate($im, 255, 255, 255);
$text_color = imagecolorallocate($im, 0, 0, 0);
imagestring($im, 2, 5, 5, "IMAGE ERROR", $text_color);
imagepng($im);
imagedestroy($im);
}
}
?>
Metti il file nella stessa cartella di dove ci sono le immagini e mostrerà in random le immagini.