Regular Expressions 101

Explanation

Pro

<ref>the literal text <ref> (case sensitive)

Non-Capturing Group(?:(?:\s)*https?:\/\/)?

?repeats the group contents below at most once:

Non-Capturing Group(?:\s)*

*repeats the group contents below any number of times:

\sany whitespace character

httpthe literal text http (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:www\.)?

?repeats the group contents below at most once:

wwwthe literal text www (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:\s)*?

*?repeats the group contents below any number of times:

\sany whitespace character

twitterthe literal text twitter (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:#!\/)?

?repeats the group contents below at most once:

#!the literal text #!

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

@?optionally matches the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 1([^\/\?\s]*)

Negated Character Class[^\/\?\s]*

*matches any number of characters outside the set below:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

\sany whitespace character

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

statusthe literal text status (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2([{\d+:\d+\}]*)

Character Class[{\d+:\d+\}]*

*matches any number of characters from the set below:

{the literal { (123₁₀ / 173₈ / 7B₁₆)

\da digit

+the literal + (43₁₀ / 53₈ / 2B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\da digit

+the literal + (43₁₀ / 53₈ / 2B₁₆)

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

Non-Capturing Group(?:[^\<]+)?

?repeats the group contents below at most once:

Negated Character Class[^\<]+

+matches at least one character outside the set below:

\<the literal < (60₁₀ / 74₈ / 3C₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

<ref>(?:(?:\s)*https?:\/\/)?(?:www\.)?(?:\s)*?twitter\.com\/(?:#!\/)?@?([^\/\?\s]*)\/status\/([{\d+:\d+\}]*)(?:[^\<]+)?

New

{{Use dmy dates|date=February 2013}}
{{Use British English|date=February 2013}}
{{Infobox road
|country=GBR
|type=A
|route=477
|image      =A477 trunk road from the bridge - geograph.org.uk - 1404312.jpg
|image_notes=The A477 near [[Kilgetty]]
|length_mi  =27.8
|length_ref =<ref>{{cite web |url=https://maps.google.co.uk/maps?saddr=A477,+St+Clears,+Carmarthenshire+SA33,+UK&daddr=51.7534814,-4.6778932+to:A477&hl=en&ll=51.775913,-4.774933&spn=0.238768,0.620728&sll=51.750096,-5.000979&sspn=0.003733,0.009699&geocode=FeukFgMd00G7_ymlDAOQrttuSDHv6MO8BQzrjw%3BFQmyFQMd-564_ykzl6T6881uSDHhH3HfTLunTQ%3BFWWnFQMdgq6z_w&t=h&mra=mift&mrsp=1&sz=17&z=11&via=1 |title=Directions to A477 |last1= |first1= |last2= |first2= |date= |work= |publisher=[[Google]] |accessdate=14 April 2013}}</ref>
|direction_a= East
|terminus_a = [[St Clears]]<br>{{coord|51.8163|-4.5049|type:landmark_region:GB|display=inline|name=A477 road (eastern end)}}
|direction_b= West
|terminus_b = [[Johnston, Pembrokeshire|Johnston]]<br>{{