regex101: PCRE2 (PHP) Unit Test Workspace

\Astart of string

google the literal text google (case sensitive)

Non-Capturing Group(?: # google.<s>com</s> \. (?: [a-z]{1,2} | [a-z]{4,} | [^c.][a-z]{2} | [a-z][^o.][a-z] | [a-z]{2}[^m.] ) | # google.com.<s>au</s> \.com\. (?: [a-z] | [a-z]{3,} | [^a.][a-z] | [a-z][^u.] ) | # google.*.*.* (?:\.[a-z]+){3} )

1st Alternative # google.<s>com</s> \. (?: [a-z]{1,2} | [a-z]{4,} | [^c.][a-z]{2} | [a-z][^o.][a-z] | [a-z]{2}[^m.] )

Comment: google.<s>com</s>

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?: [a-z]{1,2} | [a-z]{4,} | [^c.][a-z]{2} | [a-z][^o.][a-z] | [a-z]{2}[^m.] )

1st Alternative [a-z]{1,2}

Character Class[a-z]{1,2}

{1,2}matches between 1 and 2 characters from the set below:

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

2nd Alternative [a-z]{4,}

Character Class[a-z]{4,}

{4,}matches at least 4 characters from the set below:

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

3rd Alternative [^c.][a-z]{2}

Negated Character Class[^c.]

cthe literal c (99₁₀ / 143₈ / 63₁₆) (case sensitive)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]{2}

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

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

4th Alternative [a-z][^o.][a-z]

Character Class[a-z]

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

Negated Character Class[^o.]

othe literal o (111₁₀ / 157₈ / 6F₁₆) (case sensitive)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]

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

5th Alternative [a-z]{2}[^m.]

Character Class[a-z]{2}

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

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

Negated Character Class[^m.]

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

.the literal . (46₁₀ / 56₈ / 2E₁₆)

2nd Alternative # google.com.<s>au</s> \.com\. (?: [a-z] | [a-z]{3,} | [^a.][a-z] | [a-z][^u.] )

Comment: google.com.<s>au</s>

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?: [a-z] | [a-z]{3,} | [^a.][a-z] | [a-z][^u.] )

1st Alternative [a-z]

Character Class[a-z]

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

2nd Alternative [a-z]{3,}

Character Class[a-z]{3,}

{3,}matches at least 3 characters from the set below:

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

3rd Alternative [^a.][a-z]

Negated Character Class[^a.]

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

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]

4th Alternative [a-z][^u.]

3rd Alternative # google.*.*.* (?:\.[a-z]+){3}

Non-Capturing Group(?:\.[a-z]+)*

\zend of string

Global pattern flags

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Search reference

Regular Expression

\A
google
(?:
  # google.<s>com</s>
  \.
  (?:
    [a-z]{1,2} | [a-z]{4,} |
    [^c.][a-z]{2} |
    [a-z][^o.][a-z] |
    [a-z]{2}[^m.]
  )
|
  # google.com.<s>au</s>
  \.com\.
  (?:
    [a-z] | [a-z]{3,} |
    [^a.][a-z] | [a-z][^u.]
  )
|
  # google.*.*.*
  (?:\.[a-z]+){3}
)
(?:\.[a-z]+)*
\z

New

Regular Expressions 101

Regular Expression

Substitution