Regular Expressions 101

Pro

^start of line

Positive Lookahead(?=.*[0-9])

.*any character (except for line terminators), repeated any number of times

Character Class[0-9]

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

Positive Lookahead(?=.*[a-z])

.*any character (except for line terminators), repeated any number of times

Character Class[a-z]

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

Character Class[a-z0-9\/_+£&@"?!'.,()]*

*matches any number of characters from the set below:

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

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

£the literal £ (163₁₀ / 243₈ / A3₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

(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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Detailed match information will be displayed here automatically.

25 tokens

^(?=.*[0-9])(?=.*[a-z])[a-z0-9\/_+£&@"?!'.,()]*$

New

alpha1234
alpha1234!
1234alpha
!1234alpha
1234!qwer
alpha
1234

alpha1234
alpha1234!
1234alpha
!1234alpha
1234!qwer
alpha
1234