php面向对象技术全面讲解PHP objectoriented technology comprehensive explanationWord文档下载推荐.docx

php面向对象技术全面讲解PHP objectoriented technology comprehensive explanationWord文档下载推荐.docx

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2.whatisaclass,whatisanobject,aclass,andanobject?

3.whatisobjectorientedprogramming?

4.howdoyouabstractaclass?

5.howdoyouinstantiateobjects?

6.howdoyouusemembersofanobject?

7.useofthespecialreference"

$this"

8.constructionmethodsandmethodsofanalysis

9.encapsulation

Theapplicationoffourmethods,10.__set（）,__get（）,__isset（）,and__unset（）

11.typesofsuccession

12.polymorphicapplications

13.overloadingnewmethods

14.accesstype

15.useofstaticmembers

Theapplicationofthe16.finalkeyword

17.__toString（）method

18.clones

19.__callprocessingcallerror

20.autoloadingclass

21.serializationofobjects

22.abstractmethodsandabstractclasses

23.php5interfacetechnology

Objectorientedprogramming（ObjectOriented,Programming,OOP,objectorientedprogramming）isaprogrammingframework,abasicprincipleofOOPisacomputerprogramthatisasingleunitorcanplayaroleandobjectcombinationsubroutine,OOPtoachievethethreegoalsofthesoftwareengineering,reusability,flexibilityandextensionof.Inordertoimplementthewholeoperation,eachobjectisabletoreceiveinformation,processdataandsendinformationtootherobjects.Objectorientedhasbeenahottopicinthefieldofsoftwaredevelopment.Firstofall,objectorientedisconsistentwiththegeneralrulesofhumanbeings.Secondly,usingobjectorientedmethodcanmakeeachpartofthesystem,leteachpersondohisbest.Openthedoorforprogrammerstomaketheirprogrammingcodemoreconcise,easiertomaintain,andmorereusable.ItistruethatsomepeoplesaythatPHPisnotarealobjectorientedlanguage.PHPisamixedlanguage,youcanuseOOP,oryoucanusetraditionalproceduralprogramming.However,forlargeprojects,youmightneedtousepureOOPtodeclareclassesinPHP,anduseonlyobjectsandclassesinyourproject.Idon'

tsaymuchaboutthisconcept,becausethemainreasonwhymanyfriendsstayawayfromobjectorientedprogrammingisthatwhenyoutouchtheobjectorientedconcept,youdon'

tunderstandit,soyoudon'

twanttolearnit.Waituntilthereaderhasreadthewholecontent,andthengotounderstandtheconcept.

Classconcept:

aclassisacollectionofobjectswiththesameattributesandservices.Itprovidesaunifiedabstractdescriptionofallobjectsbelongingtothatclass,includingtwomainparts:

attributesandservices.Inobjectorientedprogramminglanguages,aclassisaseparateunitofprocedurethatshouldhaveaclassnameandincludetwomainsections:

attributedescriptionsandservicedescriptions.

Theconceptofanobject:

anobjectisanentityusedinthesystemtodescribeobjectivethings.Itisabasicunitofasystem.Anobjectconsistingofasetofattributesandasetofservicesthatoperateonthissetofattributes.Fromamoreabstractpointofview,theobjectistheproblemdomainorachievesomethingsinthedomainofanabstract,itreflectsthethingsthatneedtobestoredintheinformationinthesystemandplayarole;

itisasetofattributesandagroupoftherighttooperatethesepropertiesofthepackage.Theobjectiveworldismadeupoftheconnectionbetweentheobjectandtheobject.

Therelationshipbetweenclassesandobjectsisliketherelationbetweenthedieandthecasting.Theinstantiationoftheclassresultsintheobject,andtheabstractionofaclassistheclass.Aclassdescribesasetofobjectswiththesamecharacteristics（attributes）andthesamebehavior（Methods）.

Theaboveisaboutthedefinitionofit,maybeyouarejustcontactobjectorientedfriends,don'

tbeconfusedabouttheconceptofthings,letmegiveyouanexample,ifthePCyougotoZhongguancuntobuyseveralassembly,wherethefirststepyouhavetodowhatisnotinstalledinengineeringteacherandyousittogether,accordingtotheinformationyouprovideandyoucompleteasingleinstalledconfiguration.Thisconfigurationcanbeassumedtobesingle,itisapieceofpaper,butitrecordsthePCmachineyouwanttobuytheinformation,ifyouusethisconfigurationtobuy10singlemachineso,these10machinesareaccordingtotheconfigurationofsinglecomponent,sothatthe10machineisatype,butalsocanbesaidtobeaclass.Sowhatisanobject?

Theinstantiationofaclassistheobject,andthemachineisconfiguredwiththisconfigurationsheet（instantiated）istheobject,theentitythatwecanoperate,10machines,and10objects.Eachmachineisindependent,onlythattheyareofthesameclass,theother