正则表达式匹配URL

1. PHP (use with preg_match)

%^(?:(?:https?|ftp)://)(?:S+(?::S*)?@|d{1,3}(?:.d{1,3}){3}|(?:(?:[a-zdx{00a1}-x{ffff}]+-?)*[a-zdx{00a1}-x{ffff}]+)(?:.(?:[a-zdx{00a1}-x{ffff}]+-?)*[a-zdx{00a1}-x{ffff}]+)*(?:.[a-zx{00a1}-x{ffff}]{2,6}))(?::d+)?(?:[^s]*)?$%iu

2. PHP (with validate filter)

if (filter_var($url, FILTER_VALIDATE_URL) !== false)...

3. Python

http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*(),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+

4. Javascript

/((([A-Za-z]{3,9}:(?://)?)(?:[-;:&=+$,w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=+$,w]+@)[A-Za-z0-9.-]+)((?:/[+~%/.w-_]*)???(?:[-+=&;%@.w_]*)#?(?:[.!/\w]*))?)/

5. HTML5

<‍input type="url" /‍>

5.1 Perl

^(((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]+)*(/($|[a-zA-Z0-9.,;?'+&%$#=~_-]+))*$

5.2 Ruby

/A(?:(?:https?|ftp)://)(?:S+(?::S*)?@)?(?:(?!10(?:.d{1,3}){3})(?!127(?:.d{1,3}){3})(?!169.254(?:.d{1,3}){2})(?!192.168(?:.d{1,3}){2})(?!172.(?:1[6-9]|2d|3[0-1])(?:.d{1,3}){2})(?:[1-9]d?|1dd|2[01]d|22[0-3])(?:.(?:1?d{1,2}|2[0-4]d|25[0-5])){2}(?:.(?:[1-9]d?|1dd|2[0-4]d|25[0-4]))|(?:(?:[a-zu00a1-uffff0-9]+-?)*[a-zu00a1-uffff0-9]+)(?:.(?:[a-zu00a1-uffff0-9]+-?)*[a-zu00a1-uffff0-9]+)*(?:.(?:[a-zu00a1-uffff]{2,})))(?::d{2,5})?(?:/[^s]*)?z/i

6. Go (use the govalidator IsURL())

package main
 import (
         "fmt"
         "github.com/asaskevich/govalidator"
 )
 func main() {
         str := "http://www.urlregex.com"
         validURL := govalidator.IsURL(str)
         fmt.Printf("%s is a valid URL : %v n", str, validURL)
 }

7. Objective-C

(http|https)://((\w)*|([0-9]*)|([-|_])*)+([\.|/]((\w)*|([0-9]*)|([-|_])*))+

8. Swift

((?:http|https)://)?(?:www.)?[wd-_]+.w{2,3}(.w{2})?(/(?<=/)(?:[wd-./_]+)?)?

8.1 Use it in a function:

func canOpenURL(string: String?) -> Bool {
    let regEx = "((https|http)://)((\w|-)+)(([.]|[/])((\w|-)+))+"
    let predicate = NSPredicate(format:"SELF MATCHES %@", argumentArray:[regEx])
    return predicate.evaluateWithObject(string)
}

8.2 Usage:

if canOpenURL("http://www.urlregex.com") {
    print("valid url.")
} else {
    print("invalid url.")
}

9. Swift (use canOpenURL)

UIApplication.sharedApplication().canOpenURL(urlString)

10. Java

^(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]

11. VB.NET

(http(s)?://)?([w-]+.)+[w-]+[.com]+(/[/?%&=]*)?

12. C#

^(ht|f)tp(s?)://[0-9a-zA-Z]([-.w]*[0-9a-zA-Z])*(:(0-9)*)*(/?)([a-zA-Z0-9-.?,'/+&%$#_]*)?$

13. MySQL

SELECT field FROM table 
WHERE field 
REGEXP "^(https?://|www.)[.A-Za-z0-9-]+.[a-zA-Z]{2,4}

14. Bonus: What does the following regex do?

/^1?$|^(11+?)1+$/

最后

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