PHPandthistutorialPHPisanextremelypopular,OpenSourcescriptinglanguage,mostcommonlyusedonwebserverstoproducedynamicpages.Thename"PHP"isarecursiveacronymfor"PHP:HypertextPreprocessor"andwasinitiallycreatedbyRasmusLerdorfin1994.Asoftoday,thecurrentversionofPHPisversion5,withversion6inthemaking.Asmentioned,PHPismostlyusedonwebsites,whichiswhatthistutorialwillfocuson.Youmayw...