function WP_img_resize( $url, $width, $height = null, $crop = null, $single = true ) {
    if(!$url OR !$width ) return false;

    $upload_info = wp_upload_dir();
    $upload_dir = $upload_info[\'basedir\'];
    $upload_url = $upload_info[\'baseurl\'];

    if(strpos( $url, $upload_url ) === false) return false;

    $rel_path = str_replace( $upload_url, \'\', $url);
    $img_path = $upload_dir . $rel_path;

    if( !file_exists($img_path) OR !getimagesize($img_path) ) return false;

    $info = pathinfo($img_path);
    $ext = $info[\'extension\'];
    list($orig_w,$orig_h) = getimagesize($img_path);

    $dims = image_resize_dimensions($orig_w, $orig_h, $width, $height, $crop);
    $dst_w = $dims[4];
    $dst_h = $dims[5];

    $suffix = "{$dst_w}x{$dst_h}";
    $dst_rel_path = str_replace( \'.\'.$ext, \'\', $rel_path);
    $destfilename = "{$upload_dir}{$dst_rel_path}-{$suffix}.{$ext}";

    if(!$dst_h) {
        $img_url = $url;
        $dst_w = $orig_w;
        $dst_h = $orig_h;
    } elseif(file_exists($destfilename) && getimagesize($destfilename)) {
        $img_url = "{$upload_url}{$dst_rel_path}-{$suffix}.{$ext}";
    } else {
        $resized_img_path = image_resize( $img_path, $width, $height, $crop );
        if(!is_wp_error($resized_img_path)) {
            $resized_rel_path = str_replace( $upload_dir, \'\', $resized_img_path);
            $img_url = $upload_url . $resized_rel_path;
        } else {
            return false;
        }
    }
    if($single) {
        $image = $img_url;
    } else {
        $image = array (
            0 => $img_url,
            1 => $dst_w,
            2 => $dst_h
        );
    }

    return $image;
}