Custom_Background::wp_set_background_image()

Source

public function wp_set_background_image() {	check_ajax_referer( 'custom-background' );	if ( ! current_user_can( 'edit_theme_options' ) || ! isset( $_POST['attachment_id'] ) ) {	exit;	}	$attachment_id = absint( $_POST['attachment_id'] );	$sizes = array_keys(	/** This filter is documented in wp-admin/includes/media.php */	apply_filters(	'image_size_names_choose',	array(	'thumbnail' => __( 'Thumbnail' ),	'medium' => __( 'Medium' ),	'large' => __( 'Large' ),	'full' => __( 'Full Size' ),	)	)	);	$size = 'thumbnail';	if ( in_array( $_POST['size'], $sizes, true ) ) {	$size = esc_attr( $_POST['size'] );	}	update_post_meta( $attachment_id, '_wp_attachment_is_custom_background', get_option( 'stylesheet' ) );	$url = wp_get_attachment_image_src( $attachment_id, $size );	$thumbnail = wp_get_attachment_image_src( $attachment_id, 'thumbnail' );	set_theme_mod( 'background_image', sanitize_url( $url[0] ) );	set_theme_mod( 'background_image_thumb', sanitize_url( $thumbnail[0] ) );	exit; } 

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