snippets randomFile

<?php
// Snippets name : randomfile v.1
// Mod by : b4ndeng

//base Asset Dir
$basedir = $modx->config['rb_base_dir'];
$dirname = $basedir . $dir;

//$folder ; folder name
//$extenstions; file extension ex:  jpg | gif
//$withfolder; result random including folder or just file only  'nofolder' and '' 

function RandomFile($folder='', $extensions='.*',$withfolder='nofolder'){
 
    // trimming folder
    $folder = trim($folder);
    $folder = ($folder == '') ? './' : $folder;
 
    // check folder:
    if (!is_dir($folder)){ die('invalid folder given!'); }
 
    // create files array
    $files = array();
 
    // open directory
    if ($dir = @opendir($folder)){
 
        // go trough all files:
        while($file = readdir($dir)){
 
            if (!preg_match('/^\.+$/', $file) and 
                preg_match('/\.('.$extensions.')$/', $file)){
 
                // feed the array:
                $files[] = $file;                
            }            
        }        
        // close directory
        closedir($dir);    
    }
    else {
        die('Could not open the folder "'.$folder.'"');
    }
 
    if (count($files) == 0){
        die('No files where found ');
    }
 
    // seed random function:
    mt_srand((double)microtime()*1000000);
 
    // get an random index:
    $rand = mt_rand(0, count($files)-1);
 
    // check again:
    if (!isset($files[$rand])){
        die('Array index was not found! ');
    }
 
    // return the random file:
	if ($withfolder == 'nofolder'){
		$folder = '';
    }
	return $folder . $files[$rand]; 
}
$randomFile = RandomFile($dirname,'jpg|png|gif');
print $randomFile;
?>