adding folders that are empty to disallowed array - php

Question

I am using an array which allows me to prevent particular subfolders from being included in a script that generates an audio playlist. It looks like this:
$disallowed=array('..', '.', 'simon', 'steve');
I would like to find a way of disallowing any folders which are empty, or, perhaps, better still, disallowing folders that do not have any MP3s in them (in case the script interprets folders as not empty if they contain system files which are automatically generated).
I included the full script below so that you can see how the disallowed array fits in.
Would someone be able to help with this?
Thanks,
Nick
<?php
/*
* =====================
* FUNctions
* =====================
*/
/*
* array subvalue sort -- from: http://www.firsttube.com/read/sorting-a-multi-dimensional-array-with-php/
*
* this function lets me sort the multidimensional array containing song/artist information by the file modified time, a subvalue
*/
function subval_sort($a,$subkey) {
foreach($a as $k=>$v) {
$b[$k] = strtolower($v[$subkey]);
}
arsort($b); //change this to 'asort' for ascending
foreach($b as $key=>$val) {
$c[] = $a[$key];
}
return $c;
}
/*
* function written to clean up my messy code (too many slashes ... display '/' as '&raquo' (>>) for user friendliness )
*/
function clean($dirty, $type='general', $debug=false){
//debug
if($debug==true)
echo'<br />value before clean: '.$dirty.' (first character: '.substr($dirty, 0, 1).')';
/*
* General cleaning -- remove '/' at front and end
*/
if(substr($dirty, 0, 1)=='/'){
//echo'<br />found leading /';
$dirty=substr($dirty, 1, strlen($dirty)-1);
}
if(substr($dirty, -1)=='/')
$dirty=substr($dirty, 0, strlen($dirty)-1);
//prepare the subfolder display information by type
if($type=='link')
$dirty=str_replace(array('//','»'), array('/', '/'), $dirty);
else if($type=='display')
$dirty=str_replace(array('///','//','/'), array('»','»', '»'), $dirty);
else
$dirty=str_replace('»', '/', $dirty);
if($debug==true)echo' | after clean: '.$dirty;
//return
return $dirty;
}
function makelink($linkme, $debug=false){
$link=str_replace('»', '/', $linkme);
$link=str_replace('//', '/', $link);
return $link;
}
function recursiveGetSongs($directory, $fileinfo, $useID3, $getID3, $parent=null, $debug, $filtered=null){
/*
* configure function here:
*
* _usage_
* > the disallowed array should include any folders or files you explicitely don't want displayed
* > the allowedfiletypes array should include any file extentions you want to play
*/
$disallowed=array('..', '.', 'simon', 'steve');
$allowedfiletypes=array('mp3');
if($filtered!=null){
$disallowed=array_merge((array)$filtered, (array)$disallowed);
}
//simple error fix
if($directory=='./')
$directory='.';
//debug
if ($debug==true)echo'Dir to open: '.$directory;
//open directory
$dir = opendir($directory);
while ($read = readdir($dir))
{
//if ( !in_array($read, $disallowed) AND ( $filter!=null AND in_array($read, $filter) ) )
if ( !in_array($read, $disallowed) )
{
if($debug==true)echo $read.'<br />';
//if is not dir, handle file
if ( !is_dir($directory.'/'.$read) ){
if($debug==true)echo '^^ not dir | dir: '.$directory.'<br />';
if( in_array(substr($read, -3, 3), $allowedfiletypes) ){
if($useID3==TRUE){
//store id3 info
$FullFileName = realpath($directory.'/'.$read);
if($debug==TRUE)echo'<br />FFN » '.$FullFileName;
$ThisFileInfo = $getID3->analyze($FullFileName);
getid3_lib::CopyTagsToComments($ThisFileInfo);
$fileinfo[$read]['artist']=$ThisFileInfo['comments_html']['artist'][0];
$fileinfo[$read]['title']=$ThisFileInfo['comments_html']['title'][0];
$fileinfo[$read]['album']=$ThisFileInfo['comments_html']['album'][0];
$fileinfo[$read]['filename']=$ThisFileInfo['filename'];
$fileinfo[$read]['modified']=date ("YmdHis", filemtime($directory.'/'.$read));
if($debug==true)
echo "<br />$read was last modified: " . date ("YmdHis", filemtime($directory.'/'.$read));
$fileinfo[$read]['path']=$directory.'/'.$read;
if($debug==true)echo'<span style="margin-left: 10px;">path:'.$fileinfo[$read]['path'].' > fn: '.$fileinfo[$read]['filename'].'</span><br /><br />';
if($parent!=null)
$fileinfo[$read]['from']=str_replace(array('./', '//', '/'), array('', '»', '»'), $directory); // was =$parent
else
$fileinfo[$read]['from']='root'; //testing this
if($debug==true)echo'<br />'.$fileinfo[$read]['from'].'<br />';
//debug
//echo$ThisFileInfo['filename'].'<br />';
}
else{
//store filename
$fileinfo[$fileinfo['count']]['path']=$directory.'/'.$read;
$fileinfo[$fileinfo['count']]['fn']=$read;
if($parent!=null)
$fileinfo[$fileinfo['count']]['from']=str_replace(array('./', '//', '/'), array('', '»', '»'), $directory);
$fileinfo[$fileinfo['count']]['modified']=date ("YmdHis", filemtime($directory.'/'.$read));
//$fileinfo[$fileinfo['count']]=date ("YmdHis", filemtime($directory.'/'.$read));
}
//inc counter
$fileinfo['count']=$fileinfo['count']+1; // had ++ and it didn't work
}
else
;//do nothing
}
//else, must be a folder (as determined above), recurse folder
else{
//debug
if($debug==true)echo '^^ DIR<br />';
//capture subfolders in case they are needed
if($parent!='')$fileinfo['folders'].=$parent.'»'.$read.'|';
else $fileinfo['folders'].=$read.'|';
$fileinfo['folderpaths'].=$directory.'/|';
$fileinfo=recursiveGetSongs($directory.'/'.$read, $fileinfo, $useID3, $getID3, $parent.'/'.$read, $debug, $filtered);
}
}
}
closedir($dir);
return $fileinfo;
}
?>

Answer 1

Use glob('somefolder/*.mp3') to test if there are mp3s in a folder. The function will return an array, so if it's empty the folder does not contain any mp3 files.

Answer 2

You could try glob() since it's flexible and a little bit more secure than building up a 'valid array'.
foreach (glob($dir . "/*.mp3") as $filename) {
echo "$filename size " . filesize($filename) . "\n";
}