This function extracts the phone number.

    /**
     * This function extracts the phone number.
     *
     * @param string $from
     * The remitter delivered by WHATSAPP example 1234567890@s.whatsapp.net
     * 
     * @return string 
     * Returns the number of phone cleanly.
     *
    **/
Merge pull request #649 from sbalgas/patch-2

This function extracts the phone number.