php匹配網址的Regex

URI 是 Web上可用的每種資源 - HTML文檔、映像、視頻片段、程式等 - 由一個通用資源標誌符（Uniform Resource Identifier, 簡稱"URI"）進行定位。

對就分組：

      ^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(?([^#]*))?(#(.*))?
       12            3  4          5       6  7        8 9

例

 

代碼如下

複製代碼

Regex (http|ftp|https)://[w-_]+(.[w-_]+)+([w-.,@?^=%&amp;:/~+#]*[w-@?^=%&amp;/~+#])? 匹配 http://regxlib.com/Default.aspx | http://electronics.cnet.com/electronics/0-6342366-8-8994967-1.html 不匹配 www.yahoo.com   Regex ^\{2}[w-]+\(([w-][w-s]*[w-]+[$$]?$)|([w-][$$]?$)) 匹配 \serverservice | \servermy service | \serv_001service$ 不匹配 \my serverservice | \server service | \server$service Regex ^(http|https|ftp)://([a-zA-Z0-9.-]+(:[a-zA-Z0-9.&amp;%$-]+)*@)?((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]).(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0).(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0).(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0-9-]+.)*[a-zA-Z0-9-]+.[a-zA-Z]{2,4})(:[0-9]+)?(/[^/][a-zA-Z0-9.,?'\/+&amp;%$#=~_-@]*)*$ 匹配 http://www.sysrage.net | https://64.81.85.161/site/file.php?cow=moo's |ftp://user:pass@host.com:123 不匹配 sysrage.net Regex ^([a-zA-Z]:|\\[^/\:*?"<>|]+\[^/\:*?"<>|]+)(\[^/\:*?"<>|]+)+(.[^/\:*?"<>|]+)$ 匹配 c:Test.txt | \serversharedTest.txt | \serversharedTest.t 不匹配 c:Test | \servershared | \serversharedTest.? Regex ^(http|https|ftp)://([a-zA-Z0-9.-]+(:[a-zA-Z0-9.&amp;%$-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]).(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0).(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0).(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|localhost|([a-zA-Z0-9-]+.)*[a-zA-Z0-9-]+.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(:[0-9]+)*(/($|[a-zA-Z0-9.,?'\+&amp;%$#=~_-]+))*$ 匹配 http://site.com/dir/file.php?var=moo | https://localhost |ftp://user:pass@site.com:21/file/dir 不匹配 site.com | http://site.com/dir// Regex ^([a-zA-Z]:)(\[^\/:*?<>"|]*(?<![ ]))*(.[a-zA-Z]{2,6})$ 匹配 C:di___rfi_sysle.txt | c:dirfilename.txt 不匹配 c:dirfile?name.txt Regex ^([a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?.)+[a-zA-Z]{2,6}$ 匹配 regexlib.com | this.is.a.museum | 3com.com 不匹配 notadomain-.com | helloworld.c | .oops.org Regex ^(((ht|f)tp(s?))://)?(www.|[a-zA-Z].)[a-zA-Z0-9-.]+.(com|edu|gov|mil|net|org|biz|info|name|museum|us|ca|uk)(:[0-9]+)*(/($|[a-zA-Z0-9.,;?'\+&amp;%$#=~_-]+))*$ 匹配 www.blah.com:8103 | www.blah.com/blah.asp?sort=ASC |www.blah.com/blah.htm#blah 不匹配 www.state.ga | http://www.blah.ru Regex b(([w-]+://?|www[.])[^s()<>]+(?:([wd]+)|([^[:punct:]s]|/))) 匹配 http://foo.com/blah_blah | http://foo.com/blah_blah/ | (Something like http://foo.com/blah_blah) | http://foo.com/blah_blah_(wikipedia) | (Something like http://foo.com/blah_blah_(wikipedia)) | http://foo.com/blah_blah. |http://foo.com/blah_blah/. | <http://foo.com/blah_blah> | <http://foo.com/blah_blah/>| http://foo.com/blah_blah, | http://www.example.com/wpstyle/?p=364. | http://?df.ws/123 | rdar://1234 | rdar:/1234 | http://userid:password@example.com:8080 |http://userid@example.com | http://userid@example.com:8080 |http://userid:password@example.com 不匹配 no_ws.example.com | no_proto_or_ws.com | /relative_resource.php

可以匹配任何網址

代碼如下

複製代碼

<script type="text/javascript"> function IsURL(urlString) { regExp = /^((https?|ftp|news)://)?([a-z]([a-z0-9-]*[.。])+([a-z]{2}|aero|arpa|biz|com|coop|edu|gov|info|int|jobs|mil|museum|name|nato|net|org|pro|travel)|(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]).){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))(/[a-z0-9_-.~]+)*(/([a-z0-9_-.]*)(?[a-z0-9+_-.%=&]*)?)?(#[a-z][a-z0-9_]*)?$/ if (urlString.match(regExp)) return "is a url"; else return "not a url"; } url = ""; alert(IsURL(url)); </script>

PHP 測試：

代碼如下

複製代碼

<?php $search = '~^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(?([^#]*))?(#(.*))?~i'; $url = 'http://www.php.net/pub/ietf/uri/#Related'; $url = trim($url); preg_match_all($search, $url ,$rr); printf("<p>輸出URL資料為：</p><pre>%s</pre>n",var_export( $rr ,TRUE)); /* 各分組如下       $1 = http:       $2 = http       $3 = //www.php.net       $4 = www.php.net       $5 = /pub/ietf/uri/       $6 = <undefined>       $7 = <undefined>       $8 = #Related       $9 = Related */ ?>

百度上看到另外一塊簡潔的代碼：

 

代碼如下	複製代碼
<?php // 從 URL 中取得主機名稱 preg_match("/^(http://)?([^/]+)/i", "http：//www.php.net/index.html", $matches); $host = $matches[2]; // 從主機名稱中取得後面兩段 preg_match("/[^./]+.[^./]+$/", $host, $matches); echo "domain name is: {$matches[0]}n"; ?>

執行後輸出：domain name is: php.net