Simplified Shortcode Functions

I just thought I would let you know that you can simplify your shortcode functions as follows:
ORIGINAL

function show_ad_camp_1() {
	$ad_camp_encoded_value_1 = get_option( 'wp_ad_camp_1_code' );
	$ad_camp_decoded_value_1 = html_entity_decode( $ad_camp_encoded_value_1, ENT_COMPAT );

	if ( !empty( $ad_camp_decoded_value_1 ) ) {
		$output = " $ad_camp_decoded_value_1";
	}
	return $output;
}

NEW

function show_ad_camp_1() {
		return html_entity_decode(get_option( 'wp_ad_camp_1_code' ));	
}

With your code there is the possibility of trying to return a non-existent $output variable if the if condition is false. As far as I can tell, there is no reason to check if the value you are returning is empty since if it is empty nothing will be displayed anyway.