Regex to match URL

Question

I am using the following regex to match a URL:

$search  = \"/([\\S]+\\.(MUSEUM|TRAVEL|AERO|ARPA|ASIA|COOP|INFO|NAME|BIZ|CAT|COM|INT|JOBS|NET|ORG|PRO|TEL|AC|A         


        

Answer 1

This is THE ONE:

_^(?:(?: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]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\x{00a1}-\x{ffff}0-9]+-?)*[a-z\x{00a1}-\x{ffff}0-9]+)(?:\.(?:[a-z\x{00a1}-\x{ffff}0-9]+-?)*[a-z\x{00a1}-\x{ffff}0-9]+)*(?:\.(?:[a-z\x{00a1}-\x{ffff}]{2,})))(?::\d{2,5})?(?:/[^\s]*)?$_iuS

Answer 2

Not exactly what the OP asked for but this is a much simpler regular expression that does not need to be updated each time the IANA introduces a new TLD. I believe this is more adequate for most simple needs:

^(?:https?://)?(?:[\w]+\.)(?:\.?[\w]{2,})+$

no list of TLD, localhost is not matched, the number of subparts must be >= 2 and the length of each subpart must be >= 2 (fx: "a.a" will not match but "a.ab" will match).

Answer 3

This will get any url in its entirety, including ?= and #/ if they exist:

/[A-Za-z]+:\/\/[A-Za-z0-9\-_]+\.[A-Za-z0-9\-_:%&;\?\#\/.=]+/g

Answer 4

Regex to match all urls (with www, without www, with http or https, without http or https, includes all 2-6 letter top level domain names [for countries, ex 'ly','us'], ports, query strings, and anchors ['#']). It's not 100% but it is better than anything I have seen posted on the web.

It uses the top level domains from the first answer, combined with other techniques found in my searches. It will return any valid url that has bounds, that is where \b comes into play. Since the trailing '/' is also triggered by \b, the last one, is a match for one or more '?'.

/\b((http(s?):\/\/)?([a-z0-9\-]+\.)+(MUSEUM|TRAVEL|AERO|ARPA|ASIA|EDU|GOV|MIL|MOBI|COOP|INFO|NAME|BIZ|CAT|COM|INT|JOBS|NET|ORG|PRO|TEL|A[CDEFGILMNOQRSTUWXZ]|B[ABDEFGHIJLMNORSTVWYZ]|C[ACDFGHIKLMNORUVXYZ]|D[EJKMOZ]|E[CEGHRSTU]|F[IJKMOR]|G[ABDEFGHILMNPQRSTUWY]|H[KMNRTU]|I[DELMNOQRST]|J[EMOP]|K[EGHIMNPRWYZ]|L[ABCIKRSTUVY]|M[ACDEFGHKLMNOPQRSTUVWXYZ]|N[ACEFGILOPRUZ]|OM|P[AEFGHKLMNRSTWY]|QA|R[EOSUW]|S[ABCDEGHIJKLMNORTUVYZ]|T[CDFGHJKLMNOPRTVWZ]|U[AGKMSYZ]|V[ACEGINU]|W[FS]|Y[ETU]|Z[AMW])(:[0-9]{1,5})?((\/([a-z0-9_\-\.~]*)*)?((\/)?\?[a-z0-9+_\-\.%=&]*)?)?(#[a-zA-Z0-9!$&'()*+.=-_~:@/?]*)?)/gi

Answer 5

Using a single regexp to match an URL string makes the code incredible unreadable. I'd suggest to use parse_url to split the URL into its components (which is not a trivial task), and check each part with a regexp.

Answer 6

(http|www)\S+

Just use this regex to match all url's