Regular expression to find URLs within a string

Question

Does anyone know of a regular expression I could use to find URLs within a string? I've found a lot of regular expressions on Google for determining if an entire string is a URL but I need to be able to search an entire string for URLs. For example, I would like to be able to find www.google.com and http://yahoo.com in the following string:

Hello www.google.com World http://yahoo.com

I am not looking for specific URLs in the string. I am looking for ALL of the URLs in the string which is why I need a regular expression.

Answer 1

IMPROVED

Detects Urls like these:

• https://www.example.pl
• http://www.example.com
• www.example.pl
• example.com
• http://blog.example.com
• http://www.example.com/product
• http://www.example.com/products?id=1&page=2
• http://www.example.com#up
• http://255.255.255.255
• 255.255.255.255
• http:// www.site.com:8008

Regex:

/^(?:http(s)?:\/\/)?[\w.-]+(?:\.[\w\.-]+)+[\w\-\._~:/?#[\]@!\$&'\(\)\*\+,;=.]+$/gm

Please note that working with URLs and domain validation can be complex, and regex alone may not cover all edge cases. For more comprehensive URL validation, it's recommended to use specialized libraries or built-in URL validation functions provided by your programming language or framework.

Answer 2

Wasn't easy one, but managed to compose a short and efficient regex pattern to match URLs, also captures email addresses. Hope that works for you.

((\bhttp(|s)|ftp|file):\/\/)|\bwww[ ]*\.[ ]*([a-zA-Z0-9%:?#@\/=_-]*)|([a-zA-Z0-9%:.?#@\/=_-]*)[ ]*\.[ ]*(com|eu|org|co|uk|pdf|etc)

This can be tested here regexr.com

Answer 3

^(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?

This will verify the url link....

Answer 4

Try this, it can detect any kind of url with any kind of scheme and yes its tested , while copying remember that there should not be blank psace or a new line character

(?:http://(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?)(?:/(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;:@&=])*)(?:/(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;:@&=])*))*)(?:\?(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;:@&=])*))?)?)|(?:ftp://(?:(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;?&=])*)(?::(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;?&=])*))?@)?(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?))(?:/(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[?:@&=])*)(?:/(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[?:@&=])*))*)(?:;type=[AIDaid])?)?)|(?:news:(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;/?:&=])+@(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3})))|(?:[a-zA-Z](?:[a-zA-Z\d]|[_.+-])*)|\*))|(?:nntp://(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?)/(?:[a-zA-Z](?:[a-zA-Z\d]|[_.+-])*)(?:/(?:\d+))?)|(?:telnet://(?:(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;?&=])*)(?::(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;?&=])*))?@)?(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?))/?)|(?:gopher://(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?)(?:/(?:[a-zA-Z\d$\-_.+!*'(),;/?:@&=]|(?:%[a-fA-F\d]{2}))(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),;/?:@&=]|(?:%[a-fA-F\d]{2}))*)(?:%09(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;:@&=])*)(?:%09(?:(?:[a-zA-Z\d$\-_.+!*'(),;/?:@&=]|(?:%[a-fA-F\d]{2}))*))?)?)?)?)|(?:wais://(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?)/(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))*)(?:(?:/(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))*)/(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))*))|\?(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;:@&=])*))?)|(?:mailto:(?:(?:[a-zA-Z\d$\-_.+!*'(),;/?:@&=]|(?:%[a-fA-F\d]{2}))+))|(?:file://(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))|localhost)?/(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[?:@&=])*)(?:/(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[?:@&=])*))*))|(?:prospero://(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?)/(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[?:@&=])*)(?:/(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[?:@&=])*))*)(?:(?:;(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[?:@&])*)=(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[?:@&])*)))*)|(?:ldap://(?:(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?))?/(?:(?:(?:(?:(?:(?:(?:[a-zA-Z\d]|%(?:3\d|[46][a-fA-F\d]|[57][Aa\d]))|(?:%20))+|(?:OID|oid)\.(?:(?:\d+)(?:\.(?:\d+))*))(?:(?:%0[Aa])?(?:%20)*)=(?:(?:%0[Aa])?(?:%20)*))?(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))*))(?:(?:(?:%0[Aa])?(?:%20)*)\+(?:(?:%0[Aa])?(?:%20)*)(?:(?:(?:(?:(?:[a-zA-Z\d]|%(?:3\d|[46][a-fA-F\d]|[57][Aa\d]))|(?:%20))+|(?:OID|oid)\.(?:(?:\d+)(?:\.(?:\d+))*))(?:(?:%0[Aa])?(?:%20)*)=(?:(?:%0[Aa])?(?:%20)*))?(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))*)))*)(?:(?:(?:(?:%0[Aa])?(?:%20)*)(?:[;,])(?:(?:%0[Aa])?(?:%20)*))(?:(?:(?:(?:(?:(?:[a-zA-Z\d]|%(?:3\d|[46][a-fA-F\d]|[57][Aa\d]))|(?:%20))+|(?:OID|oid)\.(?:(?:\d+)(?:\.(?:\d+))*))(?:(?:%0[Aa])?(?:%20)*)=(?:(?:%0[Aa])?(?:%20)*))?(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))*))(?:(?:(?:%0[Aa])?(?:%20)*)\+(?:(?:%0[Aa])?(?:%20)*)(?:(?:(?:(?:(?:[a-zA-Z\d]|%(?:3\d|[46][a-fA-F\d]|[57][Aa\d]))|(?:%20))+|(?:OID|oid)\.(?:(?:\d+)(?:\.(?:\d+))*))(?:(?:%0[Aa])?(?:%20)*)=(?:(?:%0[Aa])?(?:%20)*))?(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))*)))*))*(?:(?:(?:%0[Aa])?(?:%20)*)(?:[;,])(?:(?:%0[Aa])?(?:%20)*))?)(?:\?(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))+)(?:,(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))+))*)?)(?:\?(?:base|one|sub)(?:\?(?:((?:[a-zA-Z\d$\-_.+!*'(),;/?:@&=]|(?:%[a-fA-F\d]{2}))+)))?)?)?)|(?:(?:z39\.50[rs])://(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?)(?:/(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))+)(?:\+(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))+))*(?:\?(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))+))?)?(?:;esn=(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))+))?(?:;rs=(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))+)(?:\+(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))+))*)?))|(?:cid:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;?:@&=])*))|(?:mid:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;?:@&=])*)(?:/(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[;?:@&=])*))?)|(?:vemmi://(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?)(?:/(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[/?:@&=])*)(?:(?:;(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[/?:@&])*)=(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[/?:@&])*))*))?)|(?:imap://(?:(?:(?:(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[&=~])+)(?:(?:;[Aa][Uu][Tt][Hh]=(?:\*|(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[&=~])+))))?)|(?:(?:;[Aa][Uu][Tt][Hh]=(?:\*|(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[&=~])+)))(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[&=~])+))?))@)?(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?))/(?:(?:(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[&=~:@/])+)?;[Tt][Yy][Pp][Ee]=(?:[Ll](?:[Ii][Ss][Tt]|[Ss][Uu][Bb])))|(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[&=~:@/])+)(?:\?(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[&=~:@/])+))?(?:(?:;[Uu][Ii][Dd][Vv][Aa][Ll][Ii][Dd][Ii][Tt][Yy]=(?:[1-9]\d*)))?)|(?:(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[&=~:@/])+)(?:(?:;[Uu][Ii][Dd][Vv][Aa][Ll][Ii][Dd][Ii][Tt][Yy]=(?:[1-9]\d*)))?(?:/;[Uu][Ii][Dd]=(?:[1-9]\d*))(?:(?:/;[Ss][Ee][Cc][Tt][Ii][Oo][Nn]=(?:(?:(?:[a-zA-Z\d$\-_.+!*'(),]|(?:%[a-fA-F\d]{2}))|[&=~:@/])+)))?)))?)|(?:nfs:(?:(?://(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?)(?:(?:/(?:(?:(?:(?:(?:[a-zA-Z\d\$\-_.!~*'(),])|(?:%[a-fA-F\d]{2})|[:@&=+])*)(?:/(?:(?:(?:[a-zA-Z\d\$\-_.!~*'(),])|(?:%[a-fA-F\d]{2})|[:@&=+])*))*)?)))?)|(?:/(?:(?:(?:(?:(?:[a-zA-Z\d\$\-_.!~*'(),])|(?:%[a-fA-F\d]{2})|[:@&=+])*)(?:/(?:(?:(?:[a-zA-Z\d\$\-_.!~*'(),])|(?:%[a-fA-F\d]{2})|[:@&=+])*))*)?))|(?:(?:(?:(?:(?:[a-zA-Z\d\$\-_.!~*'(),])|(?:%[a-fA-F\d]{2})|[:@&=+])*)(?:/(?:(?:(?:[a-zA-Z\d\$\-_.!~*'(),])|(?:%[a-fA-F\d]{2})|[:@&=+])*))*)?)))

Answer 5

This regex catches even domains like goo.gl or domains.google.

/(?:(?:((http|ftp|https):){0,1}\/\/)|www.|)([\w_-]+(?:(?:\.[\w_-]+)*))(\.(aaa|aarp|abarth|abb|abbott|abbvie|abc|able|abogado|abudhabi|ac|academy|accenture|accountant|accountants|aco|active|actor|ad|adac|ads|adult|ae|aeg|aero|aetna|af|afamilycompany|afl|africa|ag|agakhan|agency|ai|aig|aigo|airbus|airforce|airtel|akdn|al|alfaromeo|alibaba|alipay|allfinanz|allstate|ally|alsace|alstom|am|amazon|americanexpress|americanfamily|amex|amfam|amica|amsterdam|an|analytics|android|anquan|anz|ao|aol|apartments|app|apple|aq|aquarelle|ar|arab|aramco|archi|army|arpa|art|arte|as|asda|asia|associates|at|athleta|attorney|au|auction|audi|audible|audio|auspost|author|auto|autos|avianca|aw|aws|ax|axa|az|azure|ba|baby|baidu|banamex|bananarepublic|band|bank|bar|barcelona|barclaycard|barclays|barefoot|bargains|baseball|basketball|bauhaus|bayern|bb|bbc|bbt|bbva|bcg|bcn|bd|be|beats|beauty|beer|bentley|berlin|best|bestbuy|bet|bf|bg|bh|bharti|bi|bible|bid|bike|bing|bingo|bio|biz|bj|bl|black|blackfriday|blanco|blockbuster|blog|bloomberg|blue|bm|bms|bmw|bn|bnl|bnpparibas|bo|boats|boehringer|bofa|bom|bond|boo|book|booking|boots|bosch|bostik|boston|bot|boutique|box|bq|br|bradesco|bridgestone|broadway|broker|brother|brussels|bs|bt|budapest|bugatti|build|builders|business|buy|buzz|bv|bw|by|bz|bzh|ca|cab|cafe|cal|call|calvinklein|cam|camera|camp|cancerresearch|canon|capetown|capital|capitalone|car|caravan|cards|care|career|careers|cars|cartier|casa|case|caseih|cash|casino|cat|catering|catholic|cba|cbn|cbre|cbs|cc|cd|ceb|center|ceo|cern|cf|cfa|cfd|cg|ch|chanel|channel|charity|chase|chat|cheap|chintai|chloe|christmas|chrome|chrysler|church|ci|cipriani|circle|cisco|citadel|citi|citic|city|cityeats|ck|cl|claims|cleaning|click|clinic|clinique|clothing|cloud|club|clubmed|cm|cn|co|coach|codes|coffee|college|cologne|com|comcast|commbank|community|company|compare|computer|comsec|condos|construction|consulting|contact|contractors|cooking|cookingchannel|cool|coop|corsica|country|coupon|coupons|courses|cpa|cr|credit|creditcard|creditunion|cricket|crown|crs|cruise|cruises|csc|cu|cuisinella|cv|cw|cx|cy|cymru|cyou|cz|dabur|dad|dance|data|date|dating|datsun|day|dclk|dds|de|deal|dealer|deals|degree|delivery|dell|deloitte|delta|democrat|dental|dentist|desi|design|dev|dhl|diamonds|diet|digital|direct|directory|discount|discover|dish|diy|dj|dk|dm|dnp|do|docs|doctor|dodge|dog|doha|domains|doosan|dot|download|drive|dtv|dubai|duck|dunlop|duns|dupont|durban|dvag|dvr|dz|earth|eat|ec|eco|edeka|edu|education|ee|eg|eh|email|emerck|energy|engineer|engineering|enterprises|epost|epson|equipment|er|ericsson|erni|es|esq|estate|esurance|et|etisalat|eu|eurovision|eus|events|everbank|exchange|expert|exposed|express|extraspace|fage|fail|fairwinds|faith|family|fan|fans|farm|farmers|fashion|fast|fedex|feedback|ferrari|ferrero|fi|fiat|fidelity|fido|film|final|finance|financial|fire|firestone|firmdale|fish|fishing|fit|fitness|fj|fk|flickr|flights|flir|florist|flowers|flsmidth|fly|fm|fo|foo|food|foodnetwork|football|ford|forex|forsale|forum|foundation|fox|fr|free|fresenius|frl|frogans|frontdoor|frontier|ftr|fujitsu|fujixerox|fun|fund|furniture|futbol|fyi|ga|gal|gallery|gallo|gallup|game|games|gap|garden|gay|gb|gbiz|gd|gdn|ge|gea|gent|genting|george|gf|gg|ggee|gh|gi|gift|gifts|gives|giving|gl|glade|glass|gle|global|globo|gm|gmail|gmbh|gmo|gmx|gn|godaddy|gold|goldpoint|golf|goo|goodhands|goodyear|goog|google|gop|got|gov|gp|gq|gr|grainger|graphics|gratis|green|gripe|grocery|group|gs|gt|gu|guardian|gucci|guge|guide|guitars|guru|gw|gy|hair|hamburg|hangout|haus|hbo|hdfc|hdfcbank|health|healthcare|help|helsinki|here|hermes|hgtv|hiphop|hisamitsu|hitachi|hiv|hk|hkt|hm|hn|hockey|holdings|holiday|homedepot|homegoods|homes|homesense|honda|honeywell|horse|hospital|host|hosting|hot|hoteles|hotels|hotmail|house|how|hr|hsbc|ht|htc|hu|hughes|hyatt|hyundai|ibm|icbc|ice|icu|id|ie|ieee|ifm|iinet|ikano|il|im|imamat|imdb|immo|immobilien|in|inc|industries|infiniti|info|ing|ink|institute|insurance|insure|int|intel|international|intuit|investments|io|ipiranga|iq|ir|irish|is|iselect|ismaili|ist|istanbul|it|itau|itv|iveco|iwc|jaguar|java|jcb|jcp|je|jeep|jetzt|jewelry|jio|jlc|jll|jm|jmp|jnj|jo|jobs|joburg|jot|joy|jp|jpmorgan|jprs|juegos|juniper|kaufen|kddi|ke|kerryhotels|kerrylogistics|kerryproperties|kfh|kg|kh|ki|kia|kim|kinder|kindle|kitchen|kiwi|km|kn|koeln|komatsu|kosher|kp|kpmg|kpn|kr|krd|kred|kuokgroup|kw|ky|kyoto|kz|la|lacaixa|ladbrokes|lamborghini|lamer|lancaster|lancia|lancome|land|landrover|lanxess|lasalle|lat|latino|latrobe|law|lawyer|lb|lc|lds|lease|leclerc|lefrak|legal|lego|lexus|lgbt|li|liaison|lidl|life|lifeinsurance|lifestyle|lighting|like|lilly|limited|limo|lincoln|linde|link|lipsy|live|living|lixil|lk|llc|llp|loan|loans|locker|locus|loft|lol|london|lotte|lotto|love|lpl|lplfinancial|lr|ls|lt|ltd|ltda|lu|lundbeck|lupin|luxe|luxury|lv|ly|ma|macys|madrid|maif|maison|makeup|man|management|mango|map|market|marketing|markets|marriott|marshalls|maserati|mattel|mba|mc|mcd|mcdonalds|mckinsey|md|me|med|me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Innovation|meme|memorial|men|menu|meo|merckmsd|metlife|mf|mg|mh|miami|microsoft|mil|mini|mint|mit|mitsubishi|mk|ml|mlb|mls|mm|mma|mn|mo|mobi|mobile|mobily|moda|moe|moi|mom|monash|money|monster|montblanc|mopar|mormon|mortgage|moscow|moto|motorcycles|mov|movie|movistar|mp|mq|mr|ms|msd|mt|mtn|mtpc|mtr|mu|museum|music|mutual|mutuelle|mv|mw|mx|my|mz|na|nab|nadex|nagoya|name|nationwide|natura|navy|nba|nc|ne|nec|net|netbank|netflix|network|neustar|new|newholland|news|next|nextdirect|nexus|nf|nfl|ng|ngo|nhk|ni|nico|nike|nikon|ninja|nissan|nissay|nl|no|nokia|northwesternmutual|norton|now|nowruz|nowtv|np|nr|nra|nrw|ntt|nu|nycTelecommunications|nz|obi|observer|off|office|okinawa|olayan|olayangroup|oldnavy|ollo|om|omega|one|ong|onl|online|onyourside|ooo|open|oracle|orange|org|organic|orientexpress|origins|osaka|otsuka|ott|ovh|pa|page|pamperedchef|panasonic|panerai|paris|pars|partners|parts|party|passagens|pay|pccw|pe|pet|pf|pfizer|pg|ph|pharmacy|phd|philips|phone|photo|photography|photos|physio|piaget|pics|pictet|pictures|pid|pin|ping|pink|pioneer|pizza|pk|pl|place|play|playstation|plumbing|plus|pm|pn|pnc|pohl|poker|politie|porn|post|pr|pramerica|praxi|press|prime|pro|prod|productions|prof|progressive|promo|properties|property|protection|pru|prudential|ps|pt|pub|pw|pwc|py|qa|qpon|quebec|quest|qvc|racing|radio|raid|re|read|realestate|realtor|realty|recipes|red|redstone|redumbrella|rehab|reise|reisen|reit|reliance|ren|rent|rentals|repair|report|republican|rest|restaurant|review|reviews|rexroth|rich|richardli|ricoh|rightathome|ril|rio|rip|rmit|ro|rocher|rocks|rodeo|rogers|room|rs|rsvp|ru|rugby|ruhr|run|rw|rwe|ryukyu|sa|saarland|safe|safety|sakura|sale|salon|samsclub|samsung|sandvik|sandvikcoromant|sanofi|sap|sapo|sarl|sas|save|saxo|sb|sbi|sbs|sc|sca|scb|schaeffler|schmidt|scholarships|school|schule|schwarz|science|scjohnson|scor|scot|sd|se|search|seat|secure|security|seek|select|sener|services|ses|seven|sew|sex|sexy|sfr|sg|sh|shangrila|sharp|shaw|shell|shia|shiksha|shoes|shop|shopping|shouji|show|showtime|shriram|si|silk|sina|singles|site|sj|sk|ski|skin|sky|skype|sl|sling|sm|smart|smile|sn|sncf|so|soccer|social|softbank|software|sohu|solar|solutions|song|sony|soy|spa|space|spiegel|sport|spot|spreadbetting|sr|srl|srt|ss|st|stada|staples|star|starhub|statebank|statefarm|statoil|stc|stcgroup|stockholm|storage|store|stream|studio|study|style|su|sucks|supplies|supply|support|surf|surgery|suzuki|sv|swatch|swiftcover|swiss|sx|sy|sydney|symantec|systems|sz|tab|taipei|talk|taobao|target|tatamotors|tatar|tattoo|tax|taxi|tc|tci|td|tdk|team|tech|technology|tel|telecity|telefonica|temasek|tennis|teva|tf|tg|th|thd|theater|theatre|tiaa|tickets|tienda|tiffany|tips|tires|tirol|tj|tjmaxx|tjx|tk|tkmaxx|tl|tm|tmall|tn|to|today|tokyo|tools|top|toray|toshiba|total|tours|town|toyota|toys|tp|tr|trade|trading|training|travel|travelchannel|travelers|travelersinsurance|trust|trv|tt|tube|tui|tunes|tushu|tv|tvs|tw|tz|ua|ubank|ubs|uconnect|ug|uk|um|unicom|university|uno|uol|ups|us|uy|uz|va|vacations|vana|vanguard|vc|ve|vegas|ventures|verisign|versicherung|vet|vg|vi|viajes|video|vig|viking|villas|vin|vip|virgin|visa|vision|vista|vistaprint|viva|vivo|vlaanderen|vn|vodka|volkswagen|volvo|vote|voting|voto|voyage|vu|vuelos|wales|walmart|walter|wang|wanggou|warman|watch|watches|weather|weatherchannel|webcam|weber|website|wed|wedding|weibo|weir|wf|whoswho|wien|wiki|williamhill|win|windows|wine|winners|wme|wolterskluwer|woodside|work|works|world|wow|ws|wtc|wtf|xbox|xerox|xfinity|xihuan|xin|xperia|xxx|xyz|yachts|yahoo|yamaxun|yandex|ye|yodobashi|yoga|yokohama|you|youtube|yt|yun|za|zappos|zara|zero|zip|zippo|zm|zone|zuerich|zw))(?:([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-]){0,1})/i

https://regex101.com/r/snRz15/1

Answer 6

This is the one I use

(http|ftp|https):\/\/([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])

Works for me, should work for you too.

Answer 7

This expression also finds paths like: /path/text.html

(https?\:\/[^\"\'\n\<\>\;\)\s]*)|(www?\.[^\"\'\n\<\>\;\s]*)|([^\s\&\=\;\,\<\<\>\"\'\(\)]+\/[\w\/])([^\"\'\n\;\s]*)|((?<!\<)[\/]+[\w]+[^\'\"\s\<\>]*)

Answer 8

This slightly simpler version of GooDeeJAY's answer serves me well (and supports e.g. # and other characters at the expense of increasing 'false positives'):

import re
text = """The link of this question: https://stackoverflow.com/questions/6038061/regular-expression-to-find-urls-within-a-string
Also there are some urls: www.google.com, facebook.com, http://test.com/method?param=wasd, http://test.com/method?param=wasd&params2=kjhdkjshd#changed
The code below catches all urls in text and returns urls in list."""

regex = r"(?i)(https?://|www.|\w+\.)[^\s]+"
urls = [match.group() for match in re.finditer(regex, text)]
print(urls)

and outputs

[
'https://stackoverflow.com/questions/6038061/regular-expression-to-find-urls-within-a-string', 
'www.google.com,', 
'facebook.com,', 
'http://test.com/method?param=wasd,', 
'http://test.com/method?param=wasd&params2=kjhdkjshd#changed'
]

Answer 9

How about this one?

(http:\/\/|ftp:\/\/|https:\/\/|www\.)([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])?

It matches both in the question.

Answer 10

This regex is perfectly working for me, should work for you too

(http|ftp|https)://([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:/~+#-]*[\w@?^=%&/~+#-])?

Answer 11

Wrote one up myself:

let regex = /([\w+]+\:\/\/)?([\w\d-]+\.)*[\w-]+[\.\:]\w+([\/\?\=\&\#\.]?[\w-]+)*\/?/gm

It works on ALL of the following domains:

https://www.facebook.com
https://app-1.number123.com
http://facebook.com
ftp://facebook.com
http://localhost:3000
localhost:3000/
unitedkingdomurl.co.uk
this.is.a.url.com/its/still=going?wow
shop.facebook.org
app.number123.com
app1.number123.com
app-1.numbEr123.com
app.dashes-dash.com
www.facebook.com
facebook.com
fb.com/hello_123
fb.com/hel-lo
fb.com/hello/goodbye
fb.com/hello/goodbye?okay
fb.com/hello/goodbye?okay=alright
Hello www.google.com World http://yahoo.com
https://www.google.com.tr/admin/subPage?qs1=sss1&qs2=sss2&qs3=sss3#Services
https://google.com.tr/test/subPage?qs1=sss1&qs2=sss2&qs3=sss3#Services
http://google.com/test/subPage?qs1=sss1&qs2=sss2&qs3=sss3#Services
ftp://google.com/test/subPage?qs1=sss1&qs2=sss2&qs3=sss3#Services
www.google.com.tr/test/subPage?qs1=sss1&qs2=sss2&qs3=sss3#Services
www.google.com/test/subPage?qs1=sss1&qs2=sss2&qs3=sss3#Services
drive.google.com/test/subPage?qs1=sss1&qs2=sss2&qs3=sss3#Services
https://www.example.pl
http://www.example.com
www.example.pl
example.com
http://blog.example.com
http://www.example.com/product
http://www.example.com/products?id=1&page=2
http://www.example.com#up
http://255.255.255.255
255.255.255.255
shop.facebook.org/derf.html

You can see how it performs here on regex101 and adjust as needed

Answer 12

text = """The link of this question: https://stackoverflow.com/questions/6038061/regular-expression-to-find-urls-within-a-string
Also there are some urls: www.google.com, facebook.com, http://test.com/method?param=wasd, http://test.com/method?param=wasd&params2=kjhdkjshd
The code below catches all urls in text and returns urls in list."""

urls = re.findall('(?:(?:https?|ftp):\/\/)?[\w/\-?=%.]+\.[\w/\-&?=%.]+', text)
print(urls)

Output:

[
    'https://stackoverflow.com/questions/6038061/regular-expression-to-find-urls-within-a-string', 
    'www.google.com', 
    'facebook.com',
    'http://test.com/method?param=wasd',
    'http://test.com/method?param=wasd&params2=kjhdkjshd'
]

Answer 13

I liked Stefan Henze 's solution but it would pick up 34.56. Its too general and I have unparsed html. There are 4 anchors for a url;

www ,

http:\ (and co) ,

. followed by letters and then / ,

or letters . and one of these: https://ftp.isc.org/www/survey/reports/current/bynum.txt .

I used lots of info from this thread. Thank you all.

"(((((http|ftp|https|gopher|telnet|file|localhost):\\/\\/)|(www\\.)|(xn--)){1}([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?)|(([\\w_-]{2,200}(?:(?:\\.[\\w_-]+)*))((\\.[\\w_-]+\\/([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?)|(\\.((org|com|net|edu|gov|mil|int|arpa|biz|info|unknown|one|ninja|network|host|coop|tech)|(jp|br|it|cn|mx|ar|nl|pl|ru|tr|tw|za|be|uk|eg|es|fi|pt|th|nz|cz|hu|gr|dk|il|sg|uy|lt|ua|ie|ir|ve|kz|ec|rs|sk|py|bg|hk|eu|ee|md|is|my|lv|gt|pk|ni|by|ae|kr|su|vn|cy|am|ke))))))(?!(((ttp|tp|ttps):\\/\\/)|(ww\\.)|(n--)))"

Above solves just about everything except a string like "eurls:www.google.com,facebook.com,http://test.com/", which it returns as a single string. Tbh idk why I added gopher etc. Proof R code

if(T){
  wierdurl<-vector()
  wierdurl[1]<-"https://JP納豆.例.jp/dir1/納豆 "
  wierdurl[2]<-"xn--jp-cd2fp15c.xn--fsq.jp "
  wierdurl[3]<-"http://52.221.161.242/2018/11/23/biofourmis-collab"
  wierdurl[4]<-"https://12000.org/ "
  wierdurl[5]<-"  https://vg-1.com/?page_id=1002 "
  wierdurl[6]<-"https://3dnews.ru/822878"
  wierdurl[7]<-"The link of this question: https://stackoverflow.com/questions/6038061/regular-expression-to-find-urls-within-a-string
  Also there are some urls: www.google.com, facebook.com, http://test.com/method?param=wasd
  The code below catches all urls in text and returns urls in list. "
  wierdurl[8]<-"Thelinkofthisquestion:https://stackoverflow.com/questions/6038061/regular-expression-to-find-urls-within-a-string
  Alsotherearesomeurls:www.google.com,facebook.com,http://test.com/method?param=wasd
  Thecodebelowcatchesallurlsintextandreturnsurlsinlist. "
  wierdurl[9]<-"Thelinkofthisquestion:https://stackoverflow.com/questions/6038061/regular-expression-to-find-urls-within-a-stringAlsotherearesomeurlsZwww.google.com,facebook.com,http://test.com/method?param=wasdThecodebelowcatchesallurlsintextandreturnsurlsinlist."
  wierdurl[10]<-"1facebook.com/1res"
  wierdurl[11]<-"1facebook.com/1res/wat.txt"
  wierdurl[12]<-"www.e "
  wierdurl[13]<-"is this the file.txt i need"
  wierdurl[14]<-"xn--jp-cd2fp15c.xn--fsq.jpinspiredby "
  wierdurl[15]<-"[xn--jp-cd2fp15c.xn--fsq.jp/inspiredby "
  wierdurl[16]<-"xnto--jpto-cd2fp15c.xnto--fsq.jpinspiredby "
  wierdurl[17]<-"fsety--fwdvg-gertu56.ffuoiw--ffwsx.3dinspiredby "
  wierdurl[18]<-"://3dnews.ru/822878 "
  wierdurl[19]<-" http://mywebsite.com/msn.co.uk "
  wierdurl[20]<-" 2.0http://www.abe.hip "
  wierdurl[21]<-"www.abe.hip"
  wierdurl[22]<-"hardware/software/data"
  regexstring<-vector()
  regexstring[2]<-"(http|ftp|https)://([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:/~+#-]*[\\w@?^=%&/~+#-])?"
  regexstring[3]<-"/(?:(?:https?|ftp|file):\\/\\/|www\\.|ftp\\.)(?:\\([-A-Z0-9+&@#\\/%=~_|$?!:,.]*\\)|[-A-Z0-9+&@#\\/%=~_|$?!:,.])*(?:\\([-A-Z0-9+&@#\\/%=~_|$?!:,.]*\\)|[A-Z0-9+&@#\\/%=~_|$])/igm"
  regexstring[4]<-"[a-zA-Z0-9\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]?"
  regexstring[5]<-"((http|ftp|https)\\:\\/\\/)?([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:/~+#-]*[\\w@?^=%&/~+#-])?"
  regexstring[6]<-"((http|ftp|https):\\/\\/)?([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?"
  regexstring[7]<-"(http|ftp|https)(:\\/\\/)([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:/~+#-]*[\\w@?^=%&/~+#-])?"
  regexstring[8]<-"(?:(?:https?|ftp|file):\\/\\/|www\\.|ftp\\.)(?:\\([-A-Z0-9+&@#/%=~_|$?!:,.]*\\)|[-A-Z0-9+&@#/%=~_|$?!:,.])*(?:\\([-A-Z0-9+&@#/%=~_|$?!:,.]*\\)|[A-Z0-9+&@#/%=~_|$])"
  regexstring[10]<-"((http[s]?|ftp):\\/)?\\/?([^:\\/\\s]+)((\\/\\w+)*\\/)([\\w\\-\\.]+[^#?\\s]+)(.*)?(#[\\w\\-]+)?"
  regexstring[12]<-"http[s:/]+[[:alnum:]./]+"
  regexstring[9]<-"http[s:/]+[[:alnum:]./]+" #in DLpages 230
  regexstring[1]<-"[[:alnum:]-]+?[.][:alnum:]+?(?=[/ :])" #in link_graphs 50
  regexstring[13]<-"^(?!mailto:)(?:(?:http|https|ftp)://)(?:\\S+(?::\\S*)?@)?(?:(?:(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}(?:\\.(?:[0-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))|(?:(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)(?:\\.(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)*(?:\\.(?:[a-z\\u00a1-\\uffff]{2,})))|localhost)(?::\\d{2,5})?(?:(/|\\?|#)[^\\s]*)?$"
  regexstring[14]<-"(((((http|ftp|https):\\/\\/)|(www\\.)|(xn--)){1}([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?)|(([\\w_-]+(?:(?:\\.[\\w_-]+)*))((\\.((org|com|net|edu|gov|mil|int)|(([:alpha:]{2})(?=[, ]))))|([\\/]([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?))))(?!(((ttp|tp|ttps):\\/\\/)|(ww\\.)|(n--)))"
  regexstring[15]<-"(((((http|ftp|https|gopher|telnet|file|localhost):\\/\\/)|(www\\.)|(xn--)){1}([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?)|(([\\w_-]{2,200}(?:(?:\\.[\\w_-]+)*))((\\.[\\w_-]+\\/([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?)|(\\.((org|com|net|edu|gov|mil|int|arpa|biz|info|unknown|one|ninja|network|host|coop|tech)|(jp|br|it|cn|mx|ar|nl|pl|ru|tr|tw|za|be|uk|eg|es|fi|pt|th|nz|cz|hu|gr|dk|il|sg|uy|lt|ua|ie|ir|ve|kz|ec|rs|sk|py|bg|hk|eu|ee|md|is|my|lv|gt|pk|ni|by|ae|kr|su|vn|cy|am|ke))))))(?!(((ttp|tp|ttps):\\/\\/)|(ww\\.)|(n--)))"
    }

for(i in wierdurl){#c(7,22)
  for(c in regexstring[c(15)]) {
    print(paste(i,which(regexstring==c)))
    print(str_extract_all(i,c))
  }
}

Answer 14

I have utilize c# Uri class and it works, well with IP Address, localhost

 public static bool CheckURLIsValid(string url)
    {
        Uri returnURL;

       return (Uri.TryCreate(url, UriKind.Absolute, out returnURL)
           && (returnURL.Scheme == Uri.UriSchemeHttp || returnURL.Scheme == Uri.UriSchemeHttps));


    }

Answer 15

Here a little bit more optimized regexp:

(?:(?:(https?|ftp|file):\/\/|www\.|ftp\.)|([\w\-_]+(?:\.|\s*\[dot\]\s*[A-Z\-_]+)+))([A-Z\-\.,@?^=%&:\/~\+#]*[A-Z\-\@?^=%&\/~\+#]){2,6}?

Here is test with data: https://regex101.com/r/sFzzpY/6

Answer 16

(?:vnc|s3|ssh|scp|sftp|ftp|http|https)\:\/\/[\w\.]+(?:\:?\d{0,5})|(?:mailto|)\:[\w\.]+\@[\w\.]+

If you want an explanation of each part, try in regexr[.]com where you will get a great explanation of every character.

This is split by an "|" or "OR" because not all useable URI have "//" so this is where you can create a list of schemes as or conditions that you would be interested in matching.

Answer 17

It is just simple.

Use this pattern: \b((ftp|https?)://)?([\w-\.]+\.(com|net|org|gov|mil|int|edu|info|me)|(\d+\.\d+\.\d+\.\d+))(:\d+)?(\/[\w-\/]*(\?\w*(=\w+)*[&\w-=]*)*(#[\w-]+)*)?

It matches any link contains:

Allowed Protocols: http, https and ftp

Allowed Domains: *.com, *.net, *.org, *.gov, *.mil, *.int, *.edu, *.info and *.me OR IP

Allowed Ports: true

Allowed Parameters: true

Allowed Hashes: true

Answer 18

I use this Regex:

/((\w+:\/\/\S+)|(\w+[\.:]\w+\S+))[^\s,\.]/ig

It works fine for many URLs, like: http://google.com, https://dev-site.io:8080/home?val=1&count=100, www.regexr.com, localhost:8080/path, ...

Answer 19

I found this which covers most sample links, including subdirectory parts.

Regex is:

(?:(?:https?|ftp):\/\/|\b(?:[a-z\d]+\.))(?:(?:[^\s()<>]+|\((?:[^\s()<>]+|(?:\([^\s()<>]+\)))?\))+(?:\((?:[^\s()<>]+|(?:\(?:[^\s()<>]+\)))?\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’]))?

Answer 20

Using the regex provided by @JustinLevene did not have the proper escape sequences on the back-slashes. Updated to now be correct, and added in condition to match the FTP protocol as well: Will match to all urls with or without protocols, and with out without "www."

Code: ^((http|ftp|https):\/\/)?([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])?

Example: https://regex101.com/r/uQ9aL4/65

Answer 21

This is a simplest one. which work for me fine.

%(http|ftp|https|www)(://|\.)[A-Za-z0-9-_\.]*(\.)[a-z]*%

Answer 22

I used below regular expression to find url in a string:

/(http|https)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/

Answer 23

A probably too simplistic, but working method might be:

[localhost|http|https|ftp|file]+://[\w\S(\.|:|/)]+

I tested it on Python and as long as the string parsing contains a space before and after and none in the url (which I have never seen before) it should be fine.

Here is an online ide demonstrating it

However here are some benefits of using it:

• It recognises file: and localhost as well as ip addresses
• It will never match without them
• It does not mind unusual characters such as # or - (see url of this post)

Answer 24

I used this

^(https?:\\/\\/([a-zA-z0-9]+)(\\.[a-zA-z0-9]+)(\\.[a-zA-z0-9\\/\\=\\-\\_\\?]+)?)$

Answer 25

I think this regex pattern handle precisely what you want

/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/

and this is an snippet example to extract Urls:

// The Regular Expression filter
$reg_exUrl = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";

// The Text you want to filter for urls
$text = "The text you want  https://stackoverflow.com/questions/6038061/regular-expression-to-find-urls-within-a-string to filter goes here.";

// Check if there is a url in the text
preg_match_all($reg_exUrl, $text, $url,$matches);
var_dump($matches);

Answer 26

If you have to be strict on selecting links, I would go for:

(?i)\b((?:[a-z][\w-]+:(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’]))

For more infos, read this:

An Improved Liberal, Accurate Regex Pattern for Matching URLs

Answer 27

Short and simple. I have not tested in javascript code yet but It looks it will work:

((http|ftp|https):\/\/)?(([\w.-]*)\.([\w]*))

Code on regex101.com

Answer 28

None of the solutions provided here solved the problems/use-cases I had.

What I have provided here, is the best I have found/made so far. I will update it when I find new edge-cases that it doesn't handle.

\b
  #Word cannot begin with special characters
  (?<![@.,%&#-])
  #Protocols are optional, but take them with us if they are present
  (?<protocol>\w{2,10}:\/\/)?
  #Domains have to be of a length of 1 chars or greater
  ((?:\w|\&\#\d{1,5};)[.-]?)+
  #The domain ending has to be between 2 to 15 characters
  (\.([a-z]{2,15})
       #If no domain ending we want a port, only if a protocol is specified
       |(?(protocol)(?:\:\d{1,6})|(?!)))
\b
#Word cannot end with @ (made to catch emails)
(?![@])
#We accept any number of slugs, given we have a char after the slash
(\/)?
#If we have endings like ?=fds include the ending
(?:([\w\d\?\-=#:%@&.;])+(?:\/(?:([\w\d\?\-=#:%@&;.])+))*)?
#The last char cannot be one of these symbols .,?!,- exclude these
(?<![.,?!-])

Answer 29

Matching a URL in a text should not be so complex

(?:(?:(?:ftp|http)[s]*:\/\/|www\.)[^\.]+\.[^ \n]+)

https://regex101.com/r/wewpP1/2

Answer 30

All of the above answers are not match for Unicode characters in URL, for example: http://google.com?query=đức+filan+đã+search

For the solution, this one should work:

(ftp:\/\/|www\.|https?:\/\/){1}[a-zA-Z0-9u00a1-\uffff0-]{2,}\.[a-zA-Z0-9u00a1-\uffff0-]{2,}(\S*)