Regular Expressions 101

Explanation

Pro

^start of line

Non-Capturing Group(?:gir(?: *0aa)?|[a-pr-uwyz](?:[a-hk-y]?[0-9]+|[0-9][a-hjkstuw]|[a-hk-y][0-9][abehmnprv-y])(?: *[0-9][abd-hjlnp-uw-z]{2})?)

1st Alternativegir(?: *0aa)?

girthe literal text gir (case insensitive)

Non-Capturing Group(?: *0aa)?

?repeats the group contents below at most once:

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

0aathe literal text 0aa (case insensitive)

2nd Alternative[a-pr-uwyz](?:[a-hk-y]?[0-9]+|[0-9][a-hjkstuw]|[a-hk-y][0-9][abehmnprv-y])(?: *[0-9][abd-hjlnp-uw-z]{2})?

Character Class[a-pr-uwyz]

a-pone character from a (97₁₀) to p (112₁₀) (case insensitive)

r-uone character from r (114₁₀) to u (117₁₀) (case insensitive)

wthe literal w (119₁₀ / 167₈ / 77₁₆) (case insensitive)

ythe literal y (121₁₀ / 171₈ / 79₁₆) (case insensitive)

zthe literal z (122₁₀ / 172₈ / 7A₁₆) (case insensitive)

Non-Capturing Group(?:[a-hk-y]?[0-9]+|[0-9][a-hjkstuw]|[a-hk-y][0-9][abehmnprv-y])

1st Alternative[a-hk-y]?[0-9]+

Character Class[a-hk-y]?

?matches at most one character from the set below:

a-hone character from a (97₁₀) to h (104₁₀) (case insensitive)

k-yone character from k (107₁₀) to y (121₁₀) (case insensitive)

Character Class[0-9]+

+matches at least one character from the set below:

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

2nd Alternative[0-9][a-hjkstuw]

Character Class[0-9]

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

Character Class[a-hjkstuw]

a-hone character from a (97₁₀) to h (104₁₀) (case insensitive)

jthe literal j (106₁₀ / 152₈ / 6A₁₆) (case insensitive)

kthe literal k (107₁₀ / 153₈ / 6B₁₆) (case insensitive)

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case insensitive)

tthe literal t (116₁₀ / 164₈ / 74₁₆) (case insensitive)

uthe literal u (117₁₀ / 165₈ / 75₁₆) (case insensitive)

wthe literal w (119₁₀ / 167₈ / 77₁₆) (case insensitive)

3rd Alternative[a-hk-y][0-9][abehmnprv-y]

Character Class[a-hk-y]

a-hone character from a (97₁₀) to h (104₁₀) (case insensitive)

k-yone character from k (107₁₀) to y (121₁₀) (case insensitive)

Character Class[0-9]

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

Character Class[abehmnprv-y]

athe literal a (97₁₀ / 141₈ / 61₁₆) (case insensitive)

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case insensitive)

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case insensitive)

hthe literal h (104₁₀ / 150₈ / 68₁₆) (case insensitive)

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case insensitive)

nthe literal n (110₁₀ / 156₈ / 6E₁₆) (case insensitive)

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case insensitive)

rthe literal r (114₁₀ / 162₈ / 72₁₆) (case insensitive)

v-yone character from v (118₁₀) to y (121₁₀) (case insensitive)

Non-Capturing Group(?: *[0-9][abd-hjlnp-uw-z]{2})?

?repeats the group contents below at most once:

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

Character Class[0-9]

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

Character Class[abd-hjlnp-uw-z]{2}

{2}matches exactly 2 characters from the set below:

athe literal a (97₁₀ / 141₈ / 61₁₆) (case insensitive)

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case insensitive)

d-hone character from d (100₁₀) to h (104₁₀) (case insensitive)

jthe literal j (106₁₀ / 152₈ / 6A₁₆) (case insensitive)

lthe literal l (108₁₀ / 154₈ / 6C₁₆) (case insensitive)

nthe literal n (110₁₀ / 156₈ / 6E₁₆) (case insensitive)

p-uone character from p (112₁₀) to u (117₁₀) (case insensitive)

w-zone character from w (119₁₀) to z (122₁₀) (case insensitive)

$end of line

Global pattern flags

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

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

^(?:gir(?: *0aa)?|[a-pr-uwyz](?:[a-hk-y]?[0-9]+|[0-9][a-hjkstuw]|[a-hk-y][0-9][abehmnprv-y])(?: *[0-9][abd-hjlnp-uw-z]{2})?)$

New


AA9
AA99
AA9 9ZZ
AA99 9ZZ

Substitution


AA9
AA99
AA9 9ZZ
AA99 9ZZ