毕设外文翻译.docx

毕设外文翻译.docx

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西安邮电大学

毕业设计（外文翻译）

题目：

DesignandImplementationoftheWebsiteBasedonPHP&MYSQL

基于PHP和MYSQL的网站设计和实现

学院：

计算机学院

专业：

网络工程

班级：

网络1101

学生姓名：

周从军

导师姓名：

朱辉职称：

讲师

Abstract

PHPandMYSQLhasbeenthemainwebdevelopmenttoolforitisfreeandopensource.TheauthorshavediscussedtheenvironmentalissuesindevelopmentprocessbasedonPHPandMYSQLandtheimplementationprocessofthewebsite.KeywordsPHP;MYSQL;DevelopmentandImplementation.

1.INTRODUCTION

WiththedevelopmentofWebtechnology,itisinevitablechoiceforallkindofcorporategrowthtocombinetraditionalmarketingwithnetworkmarketing.Theeffectivemethodofnetworkmarketingistoestablishthewebsitewhichissuitablefortheircompany.Atpresentthewebsitedevelopment'smainstreamplatformincludes:

LAMP（Linuxoperatingsystem,Apachenetworkserver,MYSQLdatabase,PHPprogramminglanguage）,J2EEand.Netcommercialsoftware.BecausePHPandMYSQLisfree,opensourceandsoon,theyarenotedforITprofessionals.Fromtheperspectiveofwebsitetraffic,morethan70%ofwebsitetrafficisprovidedwithLAMP,whichismostpopularplatformfordevelopingthewebsite.Inthispaper,wedesignedawebsitebasedonPHPandMYSQL.Thepaperisorganizedasfollows.Section1makeconclusionInSection5.

2.DEVELOPMENTENVIRONMENTANALYSIS

A.TheChoiceofDevelopmentLanguage

ASP.NET,PHP&JSParethreemainstreamlanguagesofthewebsitedevelopment,whichhavetheiradvantagesanddisadvantagesrespectively,thecomparisonbetweenthemisshowninTable1.TheprojecttakesPHPasthedevelopmentlanguage,thereasonisasfollows:

•Free.Theprojectissmall，whichisnoneedtousethepaymentdevelopmentplatformsuchasASP.NETandJSP.•Strongsupporting.Middleandsmallscalewebsites,evensomelarge-scalewebsitessuchasbaidu,SinainChinatakePHPasthedevelopmentlanguage,whichcancontributetosolvetheproblemduringtheprogramming.analyzesdevelopmentenvironment.InSection2,weproposedthedevelopmentmodelbasedonPHP.ThencasestudyinSection4.we

•Goodportability.AlthoughitisdesignedtouseintheenvironmentofLinuxandApacheWebserversystematfirst,nowPHPisalreadytransplantedanyoperatingsystemandcompatiblestandardWebserversoftware.•Simplegrammar.PHPhasmanysimilaritieswiththeCprogramminglanguage,soitiseasytoprogramusingPHPfortheCprogrammers.•Rapiddevelopment.Becausethesourcecodeisopen,PHPwillcontinuetodeveloprapidly.

WhenZeevSuraskiaddedtheobject-orientedsyntaxbackinthedaysofPHP3,itwasaddedas"syntacticsugarforaccessingcollections."TheOOmodelalsohadsupportforinheritanceandallowedaclass（andobject）toaggregatebothmethodsandproperties,butnotmuchmore.WhenZeevandAndiGutmansrewrotethescriptingengineforPHP4,itwasacompletelynewengine;itranmuchfaster,wasmorestable,andboastedmorefeatures.However,theOOmodelfirstintroducedinPHP3wasbarelytouched.Althoughtheobjectmodelhadseriouslimitations,itwasusedextensivelyaroundtheworld,ofteninlargePHPapplications.ThisimpressiveuseoftheOOPparadigmwithPHP4,despiteitsweaknesses,ledtoitbeingthemainfocusforthePHP5release.So,whatweresomeofthelimitationsinPHP3and4?

Thebiggestlimitation（whichledtofurtherlimitations）wasthefactthatthecopysemanticsofobjectswerethesameasfornativetypes.So,howdidthisactuallyaffectthePHPdeveloper?

Whenassigningavariable（thatpointstoanobject）toanothervariable,acopyoftheobjectwouldbecreated.Notonlydidthisimpactperformance,butitalsousuallyledtoobscurebehaviorandbugsinPHP4applicationsbecausemanydevelopersthoughtthatbothvariableswouldpointatthesameobject,whichwasnotthecase.Thevariableswereinsteadpointingatseparatecopiesofthesameobject.Changingonewouldnotchangetheother.Forexample:

classPerson{var$name;functiongetName（）{return$this->name;}functionsetName（$name）{$this->name=$name;}functionPerson（$name）{$this->setName（$name）;}}functionchangeName（$person,$name）{$person->setName（$name）;}$person=newPerson（"Andi"）;changeName（$person,"Stig"）;print$person->getName（）;InPHP4,thiscodewouldprintout"Andi".Thereasonisthatwepasstheobject$persontothechangeName（）functionby-value,andthus,$personiscopiedandchangeName（）worksonacopyof$person.Thisbehaviorisnotintuitive,asmanydeveloperswouldexpecttheJava-likebehavior.InJava,variablesactuallyholdahandle（orpointer）toth