Regular Expressions 101

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Group 1([а-яёa-z0-9_]{0,100})

Character Class[а-яёa-z0-9_]{0,100}

{0,100}matches between 0 and 100 characters from the set below:

а-яone character from а (1072₁₀) to я (1103₁₀) (case insensitive)

ёthe literal ё (1105₁₀ / 2121₈ / 451₁₆) (case insensitive)

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

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

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Global pattern flags

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

u modifier: unicode. Treats the pattern and subject as UTF-16

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

\?([а-яёa-z0-9_]{0,100})

http://мой-адрес.рф/?чтото&what=whatsuuuuup-man!!!