[WP,Php]Youtube Random Video

add_shortcode( 'mi_rand_yt', 'rand_so_25319303' );

function rand_so_25319303( $atts, $content = null )
{
    $varRandom = rand(0, 2);
$miSrc;
if($varRandom == 0){
    $miSrc = "pathToYoutube1";
}
elseif($varRandom == 1){
        $miSrc = "pathToYoutube2";
}
elseif($varRandom == 2){
        $miSrc = "pathToYoutube3";
}
$output= '<div class="wpb_video_widget wpb_content_element">
        <div class="wpb_wrapper"><div class="wpb_video_wrapper"><iframe width="500" height="375" src="'.$miSrc.'" frameborder="0" allowfullscreen></iframe></div>
        </div>
    </div>'
    ;

    return $output;
}