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PHP文件是什文件,怎打開(kāi)?
Home php教程 php手冊(cè) php的簡(jiǎn)要介紹

php的簡(jiǎn)要介紹

Mar 01, 2018 am 09:40 AM

php 是一種服務(wù)器端的,嵌入html的腳本語(yǔ)言。php區(qū)別其他像客戶端java的地方是它的代碼在服務(wù)器端執(zhí)行.php能做什么??

?最低水平,php可以做任何其他cgi程序所能做的事,例如收集表格數(shù)據(jù),生成動(dòng)態(tài)頁(yè)面內(nèi)容,或者收發(fā)cookies.可能最強(qiáng)大,最有意義的特性是php支持大范圍的數(shù)據(jù)庫(kù).書(shū)寫(xiě)一個(gè)支持?jǐn)?shù)據(jù)庫(kù)的web 頁(yè)面是難以置信的簡(jiǎn)單.
?下面是當(dāng)前支持的數(shù)據(jù)庫(kù):
?adabas d interbase solid
?dbase msql sybase
?empress mysql velocis
?filepro oracle unix dbm
?informix postgresql
?php通過(guò)協(xié)議也支持與其他服務(wù)的"交談",像imap, snmp, nntp, pop3, 甚至是 http. 你也可以打開(kāi)晦澀的 網(wǎng)絡(luò)接口和其他協(xié)議交互.
php的簡(jiǎn)要?dú)v史
?1994年秋季, rasmus lerdorf 開(kāi)始構(gòu)思 php. 早期的非發(fā)行版本被用在他的主頁(yè)上,以追蹤誰(shuí)在看他的在線簡(jiǎn)歷. 1995年年初第一版本出臺(tái),當(dāng)時(shí)php只被認(rèn)為是個(gè)人主頁(yè)開(kāi)發(fā)工具.它由一個(gè)非常單純的只能理解很少數(shù)特殊宏的分析引擎和 一些用在主頁(yè)后端通用的工具組成.如留言簿,計(jì)數(shù)器和其他一些東西.這個(gè)分析器在1995年年中被重寫(xiě)并被命名為 php/fi 第二版. fi來(lái)自 rasmus 寫(xiě)的另外一個(gè)包, 用于解釋 html 形式的數(shù)據(jù).他結(jié)合了個(gè)人主頁(yè)工具腳本和形式解析器,并加 上msql支持.這樣就產(chǎn)生 php/fi 了. php/fi以令人驚奇的步調(diào)成長(zhǎng),人們開(kāi)始把自己的代碼貢獻(xiàn)給它.
?很難給出它的硬統(tǒng)計(jì)表,但可以估計(jì)在1996年末,整個(gè)世界至少有15,000個(gè)網(wǎng)站在用php/fi.到1997年年中,這個(gè) 數(shù)字已經(jīng)超過(guò)50,000了. 而在此時(shí)php的發(fā)展也發(fā)生了變化.由rasmus自己偏愛(ài)的和幾個(gè)人開(kāi)發(fā)的項(xiàng)目變成一個(gè)更有組織的團(tuán) 體成就.ev suraski和andi gutmans重寫(xiě)了解析器.這個(gè)新的解析器成為php版本3的基礎(chǔ).許多有用的代碼從php/fi 繼承到php3,并且很多是完全重寫(xiě)的.
?今天(1999年年中)不管是php/fi或php3與很多商業(yè)產(chǎn)品捆綁在一塊,例如c2級(jí)強(qiáng)度的web服務(wù)器和紅帽子linux. 根據(jù)netcraft提供的數(shù)據(jù)推斷,保守估計(jì)全世界應(yīng)用php的網(wǎng)站已超過(guò)150,000個(gè).由此看來(lái),它比在因特網(wǎng)上運(yùn)行netscape 的旗艦企業(yè)服務(wù)器的站點(diǎn)還多.

PHP文件是什文件,怎打開(kāi)?

你下載的是一個(gè)類似于asp的鏈接文件,而不是你原本的文件!
需要在服務(wù)器端執(zhí)行后才能到達(dá)正確的下載地址,所以最好點(diǎn)擊進(jìn)入網(wǎng)頁(yè)獲得正確的下載地址例如后綴類似于rar的,再使用下載地址,如果不能獲取,就可能是服務(wù)器出了問(wèn)題。無(wú)法訪問(wèn)了

PHP是一種服務(wù)器端HTML-嵌入式腳本描述語(yǔ)言。 其最強(qiáng)大和最重要的特征是其數(shù)據(jù)庫(kù)集成層,使用它完成一個(gè)含有數(shù)據(jù)庫(kù)功能的網(wǎng)頁(yè)是不可置信的簡(jiǎn)單。在HTML文件中, PHP腳本程序(語(yǔ)法類似于Perl或者c語(yǔ)言)可以使用特別的PHP標(biāo)簽進(jìn)行引用, 這樣網(wǎng)頁(yè)制作者也不必完全依賴HTML生成網(wǎng)頁(yè)了。由于PHP是在服務(wù)器端執(zhí)行的, 客戶端是看不到PHP代碼的。 PHP可以完成任何CGI腳本可以完成的任務(wù),但它的功能的發(fā)揮取決于它和各種數(shù)據(jù)庫(kù)的兼容性。 PHP除了可以使用HTTP進(jìn)行通信,也可以使用IMAP, SNMP, NNTP, POP3協(xié)議。
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