PHP file upload not allowing format that is in allowed_types

Question

I have an audio upload function that uploads music that the user selects. However, some of the files shows they are in the correct format, but the uploader says that the file I am trying to upload is not correct.

My CodeIgniter config is as follows:

$config['allowed_types'] = 'mp3|wav|m4a|wma';

I use the following to get the format of the audio:

$ext = end(explode(".", $_FILES["userfile"]["name"]));

When I echo $ext out, it shows mp3, but the uploaded returns with this error:

The filetype you are attempting to upload is not allowed.

When I use an audio converter (I use Freemake) to convert the file to mp3 again, the uploader allows the file, so I am not sure if the file displays mp3 but is still the old format on the file system.

Any information/help would be greatly appreciated.

Thanx in advance.

---

UPDATE

My PHP upload code looks like this:

    $entry_num = $this -> input -> post('entry_num');
    $location = $this -> input -> post('location');

    $foldername = "./music/$location";

    if (!file_exists($foldername))
    {
        mkdir($foldername, 0777, true);
    }

    $ext = end(explode(".", $_FILES["userfile"]["name"]));

    $config['upload_path'] = $foldername.'/';
    $config['allowed_types'] = 'mp3|wav|m4a|wma';
    $config['file_name'] = $entry_num.'.'.$ext;
    $config['overwrite'] = TRUE;

    $this -> load -> library('upload', $config);

    if (!$this -> upload -> do_upload('userfile'))
    {
        $errors = array('error' => $this -> upload -> display_errors());
        $return = implode(" ",$errors);
    }

My View looks like this: HTML

        <div class="control-group" id="load-music">
            <label for="grouping_style" class="control-label">Load MP3 Music</label>
            <div class="controls">
                <input type="file" name="userfile">
            </div>
        </div>

JavaScript

(function() 
    {
        var bar = $('.bar');
        var percent = $('.percent');
        var status = $('#status');
        var progressbar = $('#progressbar');

        $('#mp3form').ajaxForm({
            beforeSubmit : function(data) {
                check = data[1].value;
            },
            beforeSend: function() {
                progressbar.show();
                status.empty();
                var percentVal = '0%';
                bar.width(percentVal)
                percent.html(percentVal);
            },
            uploadProgress: function(event, position, total, percentComplete) {
                var percentVal = percentComplete + '%';
                bar.width(percentVal)
                percent.html(percentVal);

                if (percentComplete > 10)
                {
                    percent.show();
                }
            },
            complete: function(xhr) {                               
                if (xhr.responseText == '"success"')
                {                                       
                    $('#modal-footer-content').html("<button class='btn btn-default' onclick='cancel()'>Close</button>");
                    $('#modal-text').html('Music sucessfully uploaded, thank you.');

                    //Insert code to update table row with music play back

                    comp_code = '<?=$entry_details['location'];?>';
                    entry_num = <?=$entry_details['entry_num'];?>;

                    $('').postJsonCheck('comp/get_entry_details', {comp_code:comp_code, entry_num:entry_num},function(data){
                        var entry_details = data.entry_details;
                        var content = '<div style="float:left;padding-top:5px;"><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=10,0,0,0" width="15" height="15"><PARAM NAME=movie VALUE="<?=base_url();?>img/audioplay.swf?file=<?=base_url();?>comps/music/'+entry_details["location"]+'/'+entry_details["entry_num"]+'.'+entry_details["music_ext"]+'&auto=no&sendstop=yes&repeat=0&buttondir=<?=base_url();?>img/audiobuttons/green_small&bgcolor=0xffffff&mode=playstop"><PARAM NAME=quality VALUE=high><PARAM NAME=wmode VALUE=transparent><embed src="<?=base_url();?>img/audioplay.swf?file=<?=base_url();?>comps/music/'+entry_details["location"]+'/'+entry_details["entry_num"]+'.'+entry_details["music_ext"]+'&auto=no&sendstop=yes&repeat=0&buttondir=<?=base_url();?>img/audiobuttons/green_small&bgcolor=0xffffff&mode=playstop" quality=high wmode=transparent width="15" height="15" align="" TYPE="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer"></embed></object></div><a href="#" onclick="edit_entry_music(\'<?= $entry_details['location']; ?>\', \'<?= $entry_details['entry_num']; ?>\');return false;" style="margin-left:5px; padding-top:15px;"><i class="fa fa-music"></i></a>';

                        if (entry_details.audio_status == 'Error')
                        {
                            content = '<div style="float:left;padding-top:2px; color: red; padding-right: 7px;"><i class="fa fa-exclamation-triangle" data-original-title="Music to long! Length: '+entry_details.length_text+', Max Length: '+entry_details.max_length_text+'" data-placement="top" data-toggle="tooltip"></i></div>'+content;

                            var notification = {};
                            notification["type"] = 'error';
                            notification["text"] = 'Music added is too long!';
                            notification["title"] = 'Error';

                            show_notification(notification)
                        }

                        $('#edit_<?= $entry_details['entry_num']; ?>_music').html(content);
                        $('[data-toggle="tooltip"]').tooltip({'placement': 'top'});
                    });
                }
                else
                {
                    str = xhr.responseText;
                    var res = str.slice(4, -6); 

                    $('.music_upload_error').html(res);
                    $('.music_upload_error').show();

                    //alert('There was an error updating the music, please try again or contact the administrator. '+xhr.responseText);
                }
            }
        }); 
    })();

Answer 1

While in codeigniter opens, mimes.php and add this.

'mp3'  =>  array('audio/mpeg', 'audio/mpg', 'audio/mpeg3', 'audio/mp3', 'application/octet-stream')

application/octet-stream means binary stream. A MIME attachment with the content type "application/octet-stream" is a binary file. Typically, it will be an application or a document that must be opened in an application, such as a spreadsheet or word processor