Organize uploads by year, month and day

As of now my uploaded files are organized by year and month. But I would like to organize them by year, month and day. I mean like this 2012/10/30/image goes here

PS: There is a plugin available to do this. But I don’t want to use a plugin for this simple task. Thanks

Solutions Collecting From Web of "Organize uploads by year, month and day"

Code based in other Answer of mine and this SO Answer.

It uses the post/page/cpt publish date to build the paths.
Note that $the_post->post_date_gmt is also available.

add_filter('wp_handle_upload_prefilter', 'wpse_70946_handle_upload_prefilter');
add_filter('wp_handle_upload', 'wpse_70946_handle_upload');

function wpse_70946_handle_upload_prefilter( $file )
{
    add_filter('upload_dir', 'wpse_70946_custom_upload_dir');
    return $file;
}

function wpse_70946_handle_upload( $fileinfo )
{
    remove_filter('upload_dir', 'wpse_70946_custom_upload_dir');
    return $fileinfo;
}

function wpse_70946_custom_upload_dir($path)
{   
    /*
     * Determines if uploading from inside a post/page/cpt - if not, default Upload folder is used
     */
    $use_default_dir = ( isset($_REQUEST['post_id'] ) && $_REQUEST['post_id'] == 0 ) ? true : false; 
    if( !empty( $path['error'] ) || $use_default_dir )
        return $path; // Error: not uploading from a post/page/cpt 

    $the_post = get_post( $_REQUEST['post_id'] );
    $y = date( 'Y', strtotime( $the_post->post_date ) );
    $m = date( 'm', strtotime( $the_post->post_date ) );
    $d = date( 'd', strtotime( $the_post->post_date ) );

    $customdir = '/' . $y . '/' . $m . '/' . $d;

    $path['path']    = str_replace($path['subdir'], '', $path['path']); //remove default subdir (year/month)
    $path['url']     = str_replace($path['subdir'], '', $path['url']);      
    $path['subdir']  = $customdir;
    $path['path']   .= $customdir; 
    $path['url']    .= $customdir;  

    return $path;
}

As far as I can tell, the filter ‘upload_dir’ is only called once in wp-includes\functions.php

I find this solution to be much simpler. It will place all uploads into the year/month/day directory for the date it is uploaded.

function upload_dir_filter($uploads){
    $day = date('d');
    $uploads['path'] .= '/' . $day;
    $uploads['url']  .= '/' . $day;
    return $uploads;
}
add_filter('upload_dir', 'upload_dir_filter');