Regular Expressions 101

Non-Capturing Group(?:127.0.0.1|localhost.localdomain)

1st Alternative127.0.0.1

127the literal text 127

.any character (except for line terminators)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

.any character (except for line terminators)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

.any character (except for line terminators)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2nd Alternativelocalhost.localdomain

localhostthe literal text localhost (case sensitive)

.any character (except for line terminators)

localdomainthe literal text localdomain (case sensitive)

the literal (32₁₀ / 40₈ / 20₁₆)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

127the literal text 127

.any character (except for line terminators)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

.any character (except for line terminators)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

.any character (except for line terminators)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[\d.]+

+matches at least one character from the set below:

\da digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

ms the literal text ms (case sensitive)

Character Class[\d.]+

+matches at least one character from the set below:

\da digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

ms the literal text ms (case sensitive)

Character Class[\d.]+

+matches at least one character from the set below:

\da digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

msthe literal text ms (case sensitive)

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?:127.0.0.1|localhost.localdomain) \(127.0.0.1\) [\d.]+ ms [\d.]+ ms [\d.]+ ms

New

localhost.localdomain (127.0.0.1) 0.025 ms 0.007 ms 0.006 ms

127.0.0.1 (127.0.0.1) 0.025 ms 0.007 ms 0.006 ms