PHP code for randomly fetching images_PHP tutorial

// 用法
// include("ranimage.php");
// 或者
// require "ranimage.php";
$dir = DownloadFilesa2001-12-13;
function Get_Image_list($dir) {
if(!$dir) {
$dir = ".";
}
$file_array = array();
$dir_handle = opendir($dir);
$a = 0;
while($file = readdir($dir_handle)) {
if((preg_match(/jpg/,$file)) ||
(preg_match(/png/,$file)) ||
(preg_match(/gif/,$file)) ||
(preg_match(/jpeg/,$file))) {
$file_array[$a] = $file;
$a++;
}
}
return $file_array;
}
$files = Get_Image_list($dir);
$max = count($files)-1;
srand((double)microtime()*1000000);
$index = rand(0,$max);
$image_name = $files[$index];
echo("");
?>

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