Regular Expressions 101

Positive Lookbehind(?<=<)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

Non-Capturing Group(?:[a-zA-Z]+(?:\+\d+)*)+

+repeats the group contents below at least once:

Character Class[a-zA-Z]+

+matches at least one character from the set below:

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

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Non-Capturing Group(?:\+\d+)*

*repeats the group contents below any number of times:

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

\d+a digit, repeated at least once

Character Class[a-zA-Z]*

*matches any number of characters from the set below:

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

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Positive Lookahead(?=>)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?<=<)(?:[a-zA-Z]+(?:\+\d+)*)+[a-zA-Z]*(?=>)

New

Matching <abcde> to abcde.

<abcde1> should not match anything.

Matching <abcde+1> to abcde+1 
Matching <abcde+1asd+2+3+4as> to abcde+1asd+2+3+4as

<abcde+> should not match anything.

Substitution

Matching <abcde> to abcde.

<abcde1> should not match anything.

Matching <abcde+1> to abcde+1 
Matching <abcde+1asd+2+3+4as> to abcde+1asd+2+3+4as

<abcde+> should not match anything.