code: protected static function is_modified_hash( $url, $path ) {
  
  		if ( self::is_external_url( $url ) ) {
  			if ( sha1_file( $url ) !== sha1_file( $path ) ) {
  				self::$changes = true;
  				return self::$changes;
  			}
  		}
  
  		return false;
  	}
docs: Check if it matches the file hash.
  
  @since 1.0.4
  
  @param string $url  → external url.
  @param string $path → internal file path.
  
  @return boolean