今天就跟大家聊聊有關(guān)怎么在PHP中使用正則表達(dá)式將相對(duì)路徑轉(zhuǎn)換成絕對(duì)路徑,可能很多人都不太了解,為了讓大家更加了解,小編給大家總結(jié)了以下內(nèi)容,希望大家根據(jù)這篇文章可以有所收獲。
創(chuàng)新互聯(lián)主營崇明網(wǎng)站建設(shè)的網(wǎng)絡(luò)公司,主營網(wǎng)站建設(shè)方案,重慶APP軟件開發(fā),崇明h5重慶小程序開發(fā)搭建,崇明網(wǎng)站營銷推廣歡迎崇明等地區(qū)企業(yè)咨詢通常我們可能會(huì)搜索到如下的鏈接:
<!-- 空超鏈接 --> <a href=""></a> <!-- 空白符 --> <a href=" " rel="external nofollow" > </a> <!-- a標(biāo)簽含有其它屬性 --> <a href="index.html" rel="external nofollow" rel="external nofollow" rel="external nofollow" alt="超鏈接"> index.html </a> <a href="/" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank"> / target="_blank" </a> <a target="_blank" href="/" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" alt="超鏈接" > target="_blank" / alt="超鏈接" </a> <a target="_blank" title="超鏈接" href="/" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" alt="超鏈接" > target="_blank" title="超鏈接" / alt="超鏈接" </a> <!-- 根目錄 --> <a href="/" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > / </a> <a href="a" rel="external nofollow" > a </a> <!-- 含參數(shù) --> <a href="/index.html?id=1" rel="external nofollow" > /index.html?id=1 </a> <a href="?id=2" rel="external nofollow" > ?id=2 </a> <!-- // --> <a href="//index.html" rel="external nofollow" > //index.html </a> <a href="//www.mafutian.net" rel="external nofollow" > //www.mafutian.net </a> <!-- 站內(nèi)鏈接 --> <a href="http://www.hole_1.com/index.html" rel="external nofollow" > http://www.hole_1.com/index.html </a> <!-- 站外鏈接 --> <a href="http://www.mafutian.net" rel="external nofollow" > http://www.mafutian.net </a> <a href="http://www.numberer.net" rel="external nofollow" > http://www.numberer.net </a> <!-- 圖片,文本文件格式的鏈接 --> <a href="1.jpg" rel="external nofollow" > 1.jpg </a> <a href="1.jpeg" rel="external nofollow" > 1.jpeg </a> <a href="1.gif" rel="external nofollow" > 1.gif </a> <a href="1.png" rel="external nofollow" > 1.png </a> <a href="1.txt" rel="external nofollow" > 1.txt </a> <!-- 普通鏈接 --> <a href="index.html" rel="external nofollow" rel="external nofollow" rel="external nofollow" > index.html </a> <a href="index.html" rel="external nofollow" rel="external nofollow" rel="external nofollow" > index.html </a> <a href="./index.html" rel="external nofollow" > ./index.html </a> <a href="../index.html" rel="external nofollow" > ../index.html </a> <a href=".../" rel="external nofollow" > .../ </a> <a href="..." rel="external nofollow" > ... </a> <!-- 非鏈接,含有鏈接冒號(hào) --> <a href="javascript:void(0)" rel="external nofollow" > javascript:void(0) </a> <a href="a:b" rel="external nofollow" > a:b </a> <a href="/a#a:b" rel="external nofollow" > /a#a:b </a> <a href="mailto:'mafutian@126.com'" rel="external nofollow" > mailto:'mafutian@126.com' </a> <a href="/tencent://message/?uin=335134463" rel="external nofollow" > /tencent://message/?uin=335134463 </a> <!-- 相對(duì)路徑 --> <a href="." rel="external nofollow" > . </a> <a href=".." rel="external nofollow" > .. </a> <a href="../" rel="external nofollow" > ../ </a> <a href="/a/b/.." rel="external nofollow" > /a/b/.. </a> <a href="/a" rel="external nofollow" > /a </a> <a href="./b" rel="external nofollow" > ./b </a> <a href="./././././././././b" rel="external nofollow" > ./././././././././b </a> <!-- 其實(shí)就是 ./b --> <a href="../c" rel="external nofollow" > ../c </a> <a href="../../d" rel="external nofollow" > ../../d </a> <a href="../a/../b/c/../d" rel="external nofollow" > ../a/../b/c/../d </a> <a href="./../e" rel="external nofollow" > ./../e </a> <a href="http://www.hole_1.org/./../e" rel="external nofollow" > http://www.hole_1.org/./../e </a> <a href="./.././f" rel="external nofollow" > ./.././f </a> <a href="http://www.hole_1.org/../a/.../../b/c/../d/.." rel="external nofollow" > http://www.hole_1.org/../a/.../../b/c/../d/.. </a> <!-- 帶有端口號(hào) --> <a href=":8081/index.html" rel="external nofollow" > :8081/index.html </a> <a href="http://www.mafutian.net:80/index.html" rel="external nofollow" > :80/index.html </a> <a href="http://www.mafutian.net:8081/index.html" rel="external nofollow" > http://www.mafutian.net:8081/index.html </a> <a href="http://www.mafutian.net:8082/index.html" rel="external nofollow" > http://www.mafutian.net:8082/index.html </a>
處理的第一步,設(shè)置成絕對(duì)路徑:
http:// ... / ../ ../
然后本文講講如何去除絕對(duì)路徑中的 './'、'../'、'/..'的實(shí)現(xiàn)代碼:
function url_to_absolute($relative) { $absolute = ''; // 去除所有的 './' $absolute = preg_replace('/(?<!\.)\.\//','',$relative); $count = preg_match_all('/(?<!\/)\/([^\/]{1,}?)\/\.\.\//',$absolute,$res); // 迭代去除所有的 '/abc/../' do { $absolute = preg_replace('/(?<!\/)\/([^\/]{1,}?)\/\.\.\//','/',$absolute); $count = preg_match_all('/(?<!\/)\/([^\/]{1,}?)\/\.\.\//',$absolute,$res); }while($count >= 1); // 除去最后的 '/..' $absolute = preg_replace('/(?<!\/)\/([^\/]{1,}?)\/\.\.$/','/',$absolute); $absolute = preg_replace('/\/\.\.$/','',$absolute); // 除去存在的 '../' $absolute = preg_replace('/(?<!\.)\.\.\//','',$absolute); return $absolute; } $relative = 'http://www.mytest.org/../a/.../../b/c/../d/..'; var_dump(url_to_absolute($relative)); // 輸出:string '/tupian/20230522/&>看完上述內(nèi)容,你們對(duì)怎么在PHP中使用正則表達(dá)式將相對(duì)路徑轉(zhuǎn)換成絕對(duì)路徑有進(jìn)一步的了解嗎?如果還想了解更多知識(shí)或者相關(guān)內(nèi)容,請(qǐng)關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道,感謝大家的支持。本文名稱:怎么在PHP中使用正則表達(dá)式將相對(duì)路徑轉(zhuǎn)換成絕對(duì)路徑-創(chuàng)新互聯(lián)
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