Regular Expressions 101

^start of line

.{3,32}any character (except for line terminators), repeated between 3 and 32 times

#the literal # (35₁₀ / 43₈ / 23₁₆)

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

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.

Search reference

Regular Expression

^.{3,32}#[0-9]{4}$

New

andrew#1234
ab#1234
thisoneworks#1234
thisonewontwork#12345
ab#12345
thisoneshouldbeover32characterslong#1234
thisoneshouldbeexactly32characte#1234
thisoneshouldbeexactly31charact#1234
   #1234
blah#123

Regular Expression

Substitution