Sweetness - Edit page heading wrapper background image and add category images

function.php

<?php //Don't copy this line...


/*
 *	Taxonomy CMB2 Fields
 *	
 *	Add custom fields to the Post Taxonomy
 *
*/
add_action( 'cmb2_admin_init', function() {
	$cmb_tax = new_cmb2_box( array(
		'id'               	=> 	'bne_category_meta',
		'object_types'     	=> 	array( 'term' ),
		'taxonomies'       	=> 	array( 'category' ),
		'new_term_section'	=> 	true,
	) );
	
	// Field
	$cmb_tax->add_field( array(
		'name' 				=> 	__( 'Thumbnail', 'bne' ),
		'desc' 				=> 	__( 'May be used in various places such as the category archive page.', 'bne' ),
		'id'   				=> 	'bne_category_image',
		'type' 				=> 	'file',
		'options' 			=> 	array(
			'url' 					=> 	false,
			'add_upload_files_text'	=>	__( 'Add or Upload Image', 'bne' ),
		),
		'column'			=>	true,
	) );
});



/*
 * 	Page Heading Background Properties
 *
 *	Allows you to adjust the default background image used within this area on custom post types and taxonomies.
 *	Requires the Page Headings option set to above in Theme Options. 
 *
*/
add_filter( 'bne_page_heading_bg', function( $background_css ) {
	
	// Post Category
	if( is_category() ) {
		$term_id = get_queried_object_id();
		if( $term_id ) {
			$term_image = get_term_meta( $term_id, 'bne_category_image', true );
			if( $term_image ) {
				$background_css['background-image'] = $term_image;
			}
		}
	}
	
	// Single Blog Post
	if( is_single() ) {
		if( has_post_thumbnail() ) {			
			$image = get_the_post_thumbnail_url( get_the_id(), 'full' );
			$background_css['background-image'] = $image;
		}
	}
	
	return $background_css;
});