Check if a subscription is active by displaying an admin notice. (for testing only)

wcs_is_sub_active_notice.php

<?php

function wcs_is_sub_active_notice() {
    
    $sub_id = 445;
    
	if ( wcs_get_subscription( $sub_id ) ) {
		if ( wcs_get_subscription( $sub_id )->get_status() == 'active' ) {
			$class = 'notice notice-error';
			$message = __( '445 is ACTIVE', 'sample-text-domain' );
			printf( '<div class="%1$s"><p>%2$s</p></div>', esc_attr( $class ), esc_html( $message ) );
		} else { 
			$class = 'notice notice-error';
			$message = __( '445 is NOT-ACTIVE', 'sample-text-domain' );
			printf( '<div class="%1$s"><p>%2$s</p></div>', esc_attr( $class ), esc_html( $message ) );
		}
	} else { 
		$class = 'notice notice-error';
		$message = __( 'NULL', 'sample-text-domain' );
		printf( '<div class="%1$s"><p>%2$s</p></div>', esc_attr( $class ), esc_html( $message ) );
	}
}
add_action( 'admin_notices', 'wcs_is_sub_active_notice' );