regex101: PCRE (Legacy) Match Workspace

Character Class[a-z0-9\.-_]+

+matches at least one character from the set below:

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

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

\.-_one character from . (46₁₀) to _ (95₁₀)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Character Class[\w\d]+

+matches at least one character from the set below:

\wany word character

\da digit

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w+any word character, repeated at least once

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

Search reference

Regular Expression

[a-z0-9\.-_]+@[\w\d]+\.\w+

New

ivan@example.com
i.v.a.n.@example.com
_i_v_a_n_@example.com
ivan@perro.gato
ivan@perro.gato.com
ivan+@example.com
email@domain.com
firstname.lastname@domain.com
email@subdomain.domain.com
firstname+lastname@domain.com
email@123.123.123.123
email@[123.123.123.123]
"email"@domain.com
1234567890@domain.com
email@domain-one.com
_______@domain.com
email@domain.name
email@domain.co.jp
firstname-lastname@domain.com
plainaddress
#@%^%#$@#$@#.com
@domain.com
Joe Smith <email@domain.com>
email.domain.com
email@domain@domain.com
.email@domain.com
email.@domain.com
email..email@domain.com
あいうえお@domain.com
email@domain.com (Joe Smith)
email@domain
email@-domain.com
email@domain.web
email@111.222.333.44444
email@domain..com

Regular Expressions 101

Regular Expression

Substitution