Rosa - Slider Shortcode Autoplay

slider.php

$autoplay = '';
// if shortcode has attribute "autoplay", use autoplay on slider
if ( isset($atts['autoplay']) ) {
	$delay = (int)$atts['autoplay'];
	$autoplay = ' data-sliderautoplay=""';
	if ( 0 < $delay ) {
	  // if $delay < 1000, suppose value unit is meant to be seconds
		if ( 1000 > $delay ) {
			$delay*= 1000;
		}
		$autoplay.= ' data-sliderdelay="' . $delay . '"';
	}
}

$return_string = '<div class="pixcode-slider  pixslider  js-pixslider" ' . $navigation_style . ' data-slidertransition="' . $custom_slider_transition . '"' . $autoplay . '>';

$return_string .= do_shortcode( $content );

$return_string .= '</div>';
echo $return_string;