Regular Expressions 101

^start of line

Group 1(\*{0,5}?)

\*{0,5}?the literal * (42₁₀ / 52₈ / 2A₁₆) , repeated between 0 and 5 times

Group 2([a-zA-Z0-9])*

*repeats the group contents below any number of times:

Character Class[a-zA-Z0-9]

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)

$end of line

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

^(\*{0,5}?)([a-zA-Z0-9])*$

New

ALLOW CASE:
EXAMPLE1
1EXAMPLE
*****

DONT MATCH:

EXAMPLE 1
EXAMPLE.
EXAMPLE**
**EXAMPLE
*****EXAMPLE
EXA MPLE
*******
EXAMPLEÑ
****
**********
EXAMPLE*****
*EXAMPLE*

Extraction

ALLOW CASE:
EXAMPLE1
1EXAMPLE
*****

DONT MATCH:

EXAMPLE 1
EXAMPLE.
EXAMPLE**
**EXAMPLE
*****EXAMPLE
EXA MPLE
*******
EXAMPLEÑ
****
**********
EXAMPLE*****
*EXAMPLE*