Making sure if the PHP version is above 7.2 it will throw the error.

PHP Version 7.1.3.4 is not >= to 7.2. No error
PHP Version 7.2.3 is >= 7.2. Error

Author: Bill Van Pelt

src/inc/api/class-mcrypt.php

@@ -84,7 +84,7 @@ public static function upgrade_mcrypt_option( $encrypted_string ) {
 	 * @return string
 	 */
 	public static function mcrypt_decrypt( $encrypted_string ) {
-		if ( version_compare( phpversion(), '7.1', '>' ) ) {
+		if ( version_compare( phpversion(), '7.2', '>=' ) ) {
 			return new \WP_Error( 'php_version', __( 'PHP version is to low to support mcrypt_decrypt. This function has been DEPRECATED as of PHP 7.1.0 and REMOVED as of PHP 7.2.0. Relying on this function is highly discouraged.', 'wpop' ) );
 		}