Regular expressions matching URLs in php

URI is the type of resources available on the Web-HTML documents, images, video clips, programs, etc.-are located by an Uniform Resource Identifier ("URI.

Grouping:

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

Example

 

The code is as follows:

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Regular expression (http | ftp | https): // [w-_] + (. [w-_] +) + ([w -.,@? ^ = % & Amp ;:/~ + #] * [W -@? ^ = % & Amp ;/~ + #])? Matching http://regxlib.com/Default.aspx | http://electronics.cnet.com/electronics/0-6342366-8-8994967-1.html Does not match www.yahoo.com   Regular expression ^ \ {2} [w-] + \ ([w-] [w-s] * [w-] + [$]? $) | ([W-] [$]? $ )) Matching \ serverservice | \ servermy service | \ serv_001service $ Mismatch \ my serverservice | \ server service | \ server $ service Regular expression ^ (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; % $ # = ~ _-@] *) * $ Match http://www.sysrage.net | https: // 64.81.85.161/site/file. php? Cow = moo's | ftp: // user: pass@host.com: 123 Does not match sysrage.net Regular expression ^ ([a-zA-Z]: |\[ ^ /\:*? "<> |] + \ [^ /\:*? "<> |] +) (\ [^ /\:*? "<> |] +) + (. [^ /\:*? "<> |] +) $ Matching c: Test.txt | \ serversharedTest.txt | \ serversharedTest. t Does not match c: Test | \ servershared | \ serversharedTest .? Regular expression ^ (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; % $ # = ~ _-] +) * $ Match http://site.com/dir/file.php? Var = moo | https: // localhost | ftp: // user: pass@site.com: 21/file/dir Does not match site.com | http://site.com/dir // Regular expression ^ ([a-zA-Z] :) (\ [^ \/:*? <> "|] * (? <! []) * (. [A-zA-Z] {2, 6}) $ Match C: di___rfi_sysle.txt | c: dirfilename.txt Does not match c: dirfile? Name.txt Regular expression ^ ([a-zA-Z0-9] ([a-zA-Z0-9-] {} [a-zA-Z0-9])?.) + [A-zA-Z] {2, 6} $ Match regexlib.com | this. is. a. museum | 3com.com Unmatched notadomain-.com | helloworld. c | .oops.org Regular expression ^ (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; % $ # = ~ _-] +) * $ Match www.blh.com: 8103 | www.blh.com/blh.asp? Sort = ASC | www.blh.com/blh.htm?blah Does not match www. state. ga | http://www.blah.ru Regular expression B ([w-] + ://? | Www [.]) [^ s () <>] + (? :( [Wd] +) | ([^ [: punct:] s] | /))) Matching 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. | Does not match no_ws.example.com | no_proto_or_ws.com |/relative_resource.php

Can match any URL

The code is as follows:

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<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- 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 testing:

The code is as follows:

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<? Php $ Search = '~ ^ ([^ :/? #] + ):)? (// ([^ /? #] *)? ([^? #] *) (? ([^ #] *)? (#(.*))?~ I '; $ Url = 'http: // www.php.net/pub/ietf/uri/#related '; $ Url = trim ($ url ); Preg_match_all ($ search, $ url, $ rr ); Printf ("<p> output URL data: </p> <pre> % s </pre> n", var_export ($ rr, TRUE )); /* The groups are as follows: $1 = http: $2 = http $3 = // www.php.net $4 = www.php.net $5 =/pub/ietf/uri/ $6 = <undefined> $7 = <undefined> $8 = # Related $9 = Related */ ?>

Baidu saw another simple code:

 

The code is as follows:	Copy code
<? Php // Obtain the host name from the URL Preg_match ("/^ (http ://)? ([^/] +)/I "," http://www.php.net/index.html ", $ matches ); $ Host = $ matches [2]; // Obtain the following two segments from the host name Preg_match ("/[^./] +. [^./] + $/", $ host, $ matches ); Echo "domain name is: {$ matches [0]} n "; ?>

Output after execution: domain name is: php.net