ListofExamples11-1.edit_form()function16-1.InitiatingaTCPconnection16-2.ExchangingmessageswithaSMTPserver16-3.whois_request()function16-4.Simplewhoisfrontend(HTMLcode)16-5.Simplewhoisfrontend(PHPcode)16-6.Sourcecodeofthesimplewhoisfront-end16-7.Allowingserverchoice16-8.ChangedPHPcode1