regex101: PCRE (Legacy) Match Workspace

Pro

Group 1([^.\n]+)

Negated Character Class[^.\n]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\na line-feed (newline) character (ASCII 10)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 2([^.\n]+)

Negated Character Class[^.\n]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:\.([^.\n]+))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 3([^.\n]+)

Negated Character Class[^.\n]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:\.([^.\n]+))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 4([^.\n]+)

Negated Character Class[^.\n]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\na line-feed (newline) character (ASCII 10)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 5([^.\n]+)

Negated Character Class[^.\n]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:\.([^.\n]+))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 6([^.\n]+)

Negated Character Class[^.\n]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:\.([^.\n]+))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 7([^.\n]+)

Negated Character Class[^.\n]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:\.([^.\n]+))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 8([^.\n]+)

Negated Character Class[^.\n]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:\.([^.\n]+))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 9([^.\n]+)

Negated Character Class[^.\n]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:\.([^.\n]+))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 10([^.\n]+)

Global pattern flags

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

25 tokens

Regular Expression

([^.\n]+)\.([^.\n]+)(?:\.([^.\n]+))?(?:\.([^.\n]+))?\.([^.\n]+)(?:\.([^.\n]+))?(?:\.([^.\n]+))?(?:\.([^.\n]+))?(?:\.([^.\n]+))?(?:\.([^.\n]+))?

New

dog.cat.chicken.horse.whale
dog.cat.chicken.horse
dog.cat.chicken
dog.cat.chicken.horse.whale.dog.cat.chicken.horse.whale

Extraction

dog.cat.chicken.horse.whale
dog.cat.chicken.horse
dog.cat.chicken
dog.cat.chicken.horse.whale.dog.cat.chicken.horse.whale