PHP编程：php中的include和require的区分
不可能吃饭的时候咬了自己一下舌头就从此不吃饭了不是?放下畏惧，继续努力，咱们是来征服它的，而不是被它征服的，振奋起来吧同志。次要存眷白色标志语句便可。Theinclude(orrequire)statementtakesallthetext/code/markupthatexistsinthespecifiedfileandcopiesitintothefilethatusestheincludestatement.
IncludingfilesisveryusefulwhenyouwanttoincludethesamePHP,HTML,ortextonmultiplepagesofawebsite.
PHPincludeandrequireStatements
ItispossibletoinsertthecontentofonePHPfileintoanotherPHPfile(beforetheserverexecutesit),withtheincludeorrequirestatement.
Theincludeandrequirestatementsareidentical,exceptuponfailure:
<ul>requirewillproduceafatalerror(E_COMPILE_ERROR)andstopthescriptincludewillonlyproduceawarning(E_WARNING)andthescriptwillcontinueSo,ifyouwanttheexecutiontogoonandshowuserstheoutput,eveniftheincludefileismissing,usetheincludestatement.Otherwise,incaseofFrameWork,CMS,oracomplexPHPapplicationcoding,alwaysusetherequirestatementtoincludeakeyfiletotheflowofexecution.Thiswillhelpavoidcompromisingyourapplication"ssecurityandintegrity,justin-caseonekeyfileisaccidentallymissing.
Includingfilessavesalotofwork.Thismeansthatyoucancreateastandardheader,footer,ormenufileforallyourwebpages.Then,whentheheaderneedstobeupdated,youcanonlyupdatetheheaderincludefile.
Syntax
include"filename";
or
require"filename";
PHPincludeExamples
Example1
Assumewehaveastandardfooterfilecalled"footer.php",thatlookslikethis:
Toincludethefooterfileinapage,usetheincludestatement:
Example
Welcometomyhomepage!
Sometext.
Somemoretext.
Runexample?
Example2
Assumewehaveastandardmenufilecalled"menu.php":
AllpagesintheWebsiteshouldusethismenufile.Hereishowitcanbedone(weareusingaelementsothatthemenueasilycanbestyledwithCSSlater):
Example
Welcometomyhomepage!
Sometext.
Somemoretext.
Runexample?
Example3
Assumewehaveafilecalled"vars.php",withsomevariablesdefined:
Then,ifweincludethe"vars.php"file,thevariablescanbeusedinthecallingfile:
Example
Welcometomyhomepage!
Runexample?
PHPincludevs.require
TherequirestatementisalsousedtoincludeafileintothePHPcode.
However,thereisonebigdifferencebetweenincludeandrequire;whenafileisincludedwiththeincludestatementandPHPcannotfindit,thescriptwillcontinuetoexecute:
Example
Welcometomyhomepage!
Runexample?Ifwedothesameexampleusingtherequirestatement,theechostatementwillnotbeexecutedbecausethescriptexecutiondiesaftertherequirestatementreturnedafatalerror:
Example
Welcometomyhomepage!
Runexample?
Userequirewhenthefileisrequiredbytheapplication.
Useincludewhenthefileisnotrequiredandapplicationshouldcontinuewhenfileisnotfound.告诉你了一个方式，但是缺少努力这一环节，那也是白搭。 首先声明：我是一个菜鸟，是一个初学者。学习了一段php后总是感觉自己没有提高，无奈。经过反思我认为我学习过程中存在很多问题，我改变了学习方法后自我感觉有了明显的进步。 至于模板嘛，各位高人一直以来就是争论不休，我一只小菜鸟就不加入战团啦，咱们新手还是多学点东西的好。 做为1门年轻的语言，php一直很努力。 环境搭建好,当你看见你的浏览器输出“it works\\\\\\\"时你一定是喜悦的。在你解决问题的时候，我强烈建议多读php手册。 作为一个合格的coder 编码的规范是必须，命名方面我推崇“驼峰法”，另外就是自己写的代码最好要带注释，不然时间长了，就算是自己的代码估计看起来都费事，更不用说别人拉。 我还是强烈建议自己搭建php环境。因为在搭建的过程中你会遇到一些问题，通过搜索或是看php手册解决问题后，你会更加深刻的理解它们的工作原理，了解到php配置文件中的一些选项设置。 如果你已经到这种程度了，那么你已经可以做我的老师了。其实php也分很多的区域， 写的比较杂，因为我也是个新手，不当至于大家多多指正。
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