Regular Expressions 101

#the literal # (35₁₀ / 43₈ / 23₁₆)

Group 1(<a[a-z\-_\s\"\#\=]*)

<athe literal text <a (case insensitive)

Character Class[a-z\-_\s\"\#\=]*

*matches any number of characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case insensitive)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\sany whitespace character

\"the literal " (34₁₀ / 42₈ / 22₁₆)

\#the literal # (35₁₀ / 43₈ / 23₁₆)

\=the literal = (61₁₀ / 75₈ / 3D₁₆)

Group 2(href=")

href="the literal text href=" (case insensitive)

Group 3((https?|http):\/\/)

Group 4(https?|http)

1st Alternativehttps?

httpthe literal text http (case insensitive)

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

2nd Alternativehttp

httpthe literal text http (case insensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

#ithe literal text #i (case insensitive)

Global pattern flags

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

s modifier: single line. Allows a dot to match line terminators

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

U modifier: Ungreedy. Quantifiers are lazy by default. A trailing ? makes a quantifier greedy

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

#(<a[a-z\-_\s\"\#\=]*)(href=")((https?|http):\/\/)#i

New

<a href="url">vasya</a>