外文文献-php introduction and prospectphp介绍及前景

毕业设计外文文献原文及译文PHPINTRODUCTIONANDPROSPECTPHP介绍及前景学生姓名学号系别专业指导教师2015年5月电子与计算机科学技术系网络工程PHPINTRODUCTIONANDPROSPECTPHPISENGLISHHYPERTEXTPREPROCESSORHYPERTEXTPREPROCESSORABBREVIATIONITHASAVERYSTRONGFUNCTION,ALLOFTHEJAVASCRIPTPHPFUNCTIONALITYCANBEACHIEVED,ANDALMOSTALLTHEPOPULARDATABASEANDOPERATINGSYSTEMSUPPORT,ISTHEWORLDSMOSTPOPULAR,THEMOSTWIDELYUSEDWEBDEVELOPMENTLANGUAGEONEPHPLANGUAGEWITHSIMPLE,OPENSOURCE,SUPPORTOBJECTORIENTEDPROGRAMMING,SUPPORTCROSSPLATFORMOPERATIONANDCOMPLETELYFREECHARACTERISTICS,MOREANDMOREBYTHEFAVOROFTHEMAJORITYOFPROGRAMMERSANDRECOGNITIONPHPUNIQUEGRAMMARISAMIXOFC,JAVA,PRELANDPHPOWNGRAMMARITISAKINDOFHTMLEMBEDDEDSCRIPTINGLANGUAGE,PHPANDMICROSOFTSASPQUITEABITSIMILAR,AREAINTHEIMPLEMENTATIONOFTHESERVERENDEMBEDDEDINHTMLDOCUMENTSSCRIPTINGLANGUAGE,LANGUAGESTYLESIMILARTOTHECLANGUAGECOMPAREDWITHPHPDYNAMICWEBPAGESANDOTHERPROGRAMMINGLANGUAGE,PHPISTHEPROGRAMISEMBEDDEDINTOHTMLDOCUMENTSTOEXECUTE,THEEXECUTIONEFFICIENCYTHANCOMPLETELYGENERATEHTMLTAGSOFTHECGIISMUCHHIGHER,ANDTHESAMEISCOMPAREDTOTHEHTMLDOCUMENTEMBEDDEDSCRIPTINGLANGUAGEJAVASCRIPT,PHPISEXECUTEDONTHESERVERSIDE,MAKEFULLUSEOFTHEPERFORMANCEOFTHESERVERPHPEXECUTIONENGINEWILLOFTENWILLTHEUSERACCESSTOTHEPHPPROGRAMTHATRESIDESINMEMORYANDOTHERUSERSONCEAGAINVISITTHEPROGRAMDONOTNEEDTORECOMPILETHEPROGRAM,ASLONGASTHEDIRECTEXECUTIONOFTHECODEINMEMORYCAN,WHICHISTHEEMBODIMENTOFPHPANDHIGHEFFICIENCYTHEREFOREITCANPERFORMDYNAMICWEBPAGEMOREQUICKLYTHANCGIORPRELPHPINTHECOUNTRYINADDITIONTOTHEWEBSITECANDOALOTOFOTHERTHINGSCOMPAREDTOTHEJSP,NET,PHPWEBSITEISALSOTHEADVANTAGEOFTHATOTHERLANGUAGECANNOTBEMENTIONEDINTHESAMEBREATHALTHOUGHCOMPAREDWITHJAVA,PHPCANBEMORERESTRICTEDCATEGORY,CANBEUSEDONLYINTHENETWORKSERVER,UNLIKETHEJAVAAVAILABLESPACEBUTPHPALSOHASHEROWNUNIQUEADVANTAGES,THEBIGGESTFEATUREISSIMPLE,FASTBECAUSETHEREISNONEEDFORAVIRTUALMACHINE,SOTHATTHESPEEDIS5TIMESFASTERTHANJAVAFROMTHECURRENTMARKETSITUATION,ABOUT22MILLIONOFTHEWEBSITEUSINGPHP,INCLUDINGYAHOOWELLKNOWNSITES,QUANTITYANDKEEPONINCREASINGANDITISTHEBLESSINGOFTHECOMPUTERMANUFACTURERS,LIKEIBMANDORACLEARECOMMITTEDTOTHEDEVELOPMENTOFTHATPHPSOFTWARECANCAPTUREITSDATABASEPROCEDURES,SUPPORTPHPDEVELOPMENTWITHTHEDEVELOPMENTOFTHEINTERNET,THENUMBEROFINTERNETISINCREASINGDAYBYDAY,ANDTHENEEDSOFUSERSOFTHESTATIONBEGANTORISESUBSTANTIALLY,PHPHOSTINGMARKETWILLCONTINUETOEXPANDTHUS,THEDOMESTICFIRSTPROVIDEPHPHOSTINGINTERNETERAWWWNOWCNHASLAUNCHEDAVARIETYOFSUPPORTPHPSCRIPTTYPEVIRTUALHOST,ANDOTHERSUPPORTASP,NET,JSP,CGI,PERLSCRIPTVIRTUALHOSTTAILOREDTOTHESIZEOFTHESPACE,OPTIONALTYPESTOMEETUSERSTATIONDIVERSIFICATIONDEMAND,HUMANIZEDSERVICEGETTHEPRAISETHEMAJORITYOFUSERSPHPISRAPIDLYBECOMINGASTANDARD,VERSATILE,OBJECTORIENTEDSCRIPTINGLANGUAGETHEFUTUREDEVELOPMENTOFSOCIETYMUSTBESIMPLEANDQUICKTHISFROMAVARIETYOFOTHERINDUSTRYDEVELOPMENTTRENDALREADYCANPEEP,ANDPHPLANGUAGEISAKINDOFSIMPLE,OBJECTORIENTED,INTERPRETED,ROBUST,SECURE,ISAHIGHPERFORMANCE,INDEPENDENTINSTRUCTURE,PORTABLE,DYNAMICSCRIPTINGLANGUAGEITSDEVELOPMENTSPEEDISFASTERTHANANYKINDOFCOMPUTERLANGUAGE,BUTALSOFROMTHESIDECONFIRMEDTHISPOINTIBELIEVE,INTHENEARFUTURE,AFTERCONTINUOUSDEVELOPMENT,PHPWILLBECOMETHEMAINSTREAMOFTHE“MAINSTREAMDEVELOPMENTLANGUAGEPHPINTRODUCTIONANDPROSPECTPHP介绍及前景PHP是英文超文本预处理语言HYPERTEXTPREPROCESSOR的缩写。它具有非常强大的功能，所有的JAVASCRIPT的功能PHP都能实现，而且支持几乎所有流行的数据库以及操作系统，是全球最普及、应用最广泛的互联网开发语言之一。PHP语言具有简单、开源、支持面向对象的编程、支持跨平台的操作以及完全免费等特点，越来越受到广大程序员的青睐和认同。PHP独特的语法混合了C、JAVA、PREL以及PHP自创的语法。它是一种HTML内嵌式的语言，PHP与微软的ASP颇有几分相似，都是一种在服务器端执行的嵌入HTML文档的脚本语言，语言的风格类似于C语言。用PHP做出的动态页面与其他的编程语言相比，PHP是将程序嵌入到HTML文档中去执行，执行效率比完全生成HTML标记的CGI要高许多；与同样是嵌入HTML文档的脚本语言JAVASCRIPT相比，PHP在服务器端执行，充分利用了服务器的性能；PHP执行引擎还会将用户经常访问的PHP程序驻留在内存中，其他用户再一次访问这个程序时就不需要重新编译程序了，只要直接执行内存中的代码就可以了，这也是PHP高效率的体现之一。因此它可以比CGI或者PREL更快速地执行动态网页。PHP在国内除了做网站还能做很多其他的事相比JSP，NET，PHP的在WEBSITE方面的优势也是其他语言不可相提并论的。尽管与JAVA相比较，PHP可用范畴限制较多，仅能用在网络服务器上，不像JAVA的可用空间大。但PHP也有她自己独有的优势，最大的特色就是简单，快速。因为不需要虚拟机，以致速度比JAVA快5倍。从目前市场情况看，大约有2200万的网站采用PHP，包括YAHOO等知名网站，数量并持续增加中，而且目前也受到计算机工业大厂的庇佑，像IBM跟ORACLE都致力开发让PHP软件可以撷取旗下数据库的程序，支持PHP的发展。随着互联网的发展，上网的人数与日俱增，用户的建站需求开始大幅度上升，PHP的主机市场也将不断扩大。由此，国内最早提供PHP主机的时代互联（WWWNOWCN）目前已推出多款支持PHP脚本类型的虚拟主机，同时还有其他支持ASP，NET，JSP，CGI，PERL等脚本的虚拟主机，其空间大小量身定做，类型任选，满足用户建站多样化的需求