Regular Expressions 101

^start of line

#?optionally matches the literal # (35₁₀ / 43₈ / 23₁₆)

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)

Negated Character Class[^\n#<>@.\/()]+

+matches at least one character outside the set below:

\na line-feed (newline) character (ASCII 10)

#the literal # (35₁₀ / 43₈ / 23₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

$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

^#?[a-zA-Z0-9][^\n#<>@.\/()]+$

New

##msidfipds
fdsfsdfd#1m

vcvxcvxcvxc
#fdfdsfsdfs