Regular Expressions 101

Explanation

Pro

^start of string

Group 1([a-zA-Z]{1,100}=[a-zA-Z0-9]{1,100})

Character Class[a-zA-Z]{1,100}

{1,100}matches between 1 and 100 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)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

Character Class[a-zA-Z0-9]{1,100}

{1,100}matches between 1 and 100 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)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Non-Capturing Group(?:\R(?1))*

*repeats the group contents below any number of times:

\Ra newline sequence

(?1)calls group 1 as a subroutine

$end of string, or before its final line terminator

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

^([a-zA-Z]{1,100}=[a-zA-Z0-9]{1,100})(?:\R(?1))*$

New

a=one
b=two
c=3
d=33
eee=eee