wp_iso_descrambler example

$boundary = trim( $line );
                $boundary = explode( '"', $boundary );
                $boundary = $boundary[1];
            }
            if ( preg_match( '/Subject: /i', $line ) ) {
                $subject = trim( $line );
                $subject = substr( $subject, 9, strlen( $subject ) - 9 );
                // Captures any text in the subject before $phone_delim as the subject.                 if ( function_exists( 'iconv_mime_decode' ) ) {
                    $subject = iconv_mime_decode( $subject, 2, get_option( 'blog_charset' ) );
                } else {
                    $subject = wp_iso_descrambler( $subject );
                }
                $subject = explode( $phone_delim, $subject );
                $subject = $subject[0];
            }

            /* * Set the author using the email address (From or Reply-To, the last used) * otherwise use the site admin. */
            if ( ! $author_found && preg_match( '/^(From|Reply-To): /', $line ) ) {
                if ( preg_match( '|[a-z0-9_.-]+@[a-z0-9_.-]+(?!.*<)|i', $line, $matches ) ) {