Image and Mobile image for Advanced custom fields 5 + wordpress mobile

acf.php

<?php 

	$image  = get_sub_field('background_image');

	// Image related details			
	$img_title = $image['title']; 
	$alt = $image['alt']; 
	$size = 'hero-video';
	$thumb = $image['sizes'][ $size ];
	$width = $image['sizes'][ $size . '-width' ];
	$height = $image['sizes'][ $size . '-height' ];
	
	// Mobile Sizing of images
	$msize = 'hero-mobile'; //
	$mthumb = $image['sizes'][ $msize ]; //
	$mwidth = $image['sizes'][ $msize . '-width' ];
	$mheight = $image['sizes'][ $msize . '-height' ];
	
	// Put the images into a variable. Can't be arsed to leave code everywhere, keep it bundled together.			
	$m_img = '<img src="'. $mthumb .'" alt="' . $alt . '" width="' . $width . '" height="' . $height .'" title="' . $img_title . '"/>';
	$img = '<img src="'. $thumb .'" alt="' . $alt . '" width="' . $width . '" height="' . $height .'" title="' . $img_title . '"/>';

	/* Profile Picture */ if(!wp_is_mobile()){echo $img;} else {echo $m_img;} ?>