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^start of string

Character Class[a-zA-Z0-9]+

+matches at least one character from the set below:

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)

Group 1([\-]?)+

+repeats the group contents below at least once:

Character Class[\-]?

?matches at most one character from the set below:

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 2([\._]?[a-zA-Z0-9\-])+

+repeats the group contents below at least once:

Character Class[\._]?

?matches at most one character from the set below:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 3([\._]?)*

*repeats the group contents below any number of times:

Character Class[\._]?

?matches at most one character from the set below:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 4([a-zA-Z0-9])

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)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

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)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 5([\._]?[a-zA-Z0-9\-])*

*repeats the group contents below any number of times:

Character Class[\._]?

?matches at most one character from the set below:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 6(\.\w{2,3})+

+repeats the group contents below at least once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w{2,3}any word character, repeated between 2 and 3 times

$end of string

Search reference

Regular Expression

^[a-zA-Z0-9]+([\-]?)+([\._]?[a-zA-Z0-9\-])+([\._]?)*([a-zA-Z0-9])@[a-zA-Z0-9\-]([\._]?[a-zA-Z0-9\-])*(\.\w{2,3})+$

Test String
New

i_s-.o.--m_e@gmail.com

Regular Expressions 101

Regular Expression

Test String
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Extraction
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Regular Expression

Test StringNew

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Test String
New

Extraction
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