regex101: LDAP URI regex

^start of line

Group 1(ldap(s)?:\/\/)

ldapthe literal text ldap (case sensitive)

Group 2(s)?

?repeats the group contents below at most once:

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 3(((\d{1,3}.){3}\d{1,3}(:\d+)?)|(\w|\d|)+|((\[([a-f0-9]{1,4}:{1,2}){1,4}([a-f0-9]{1,4})\])(:\d+)?))

1st Alternative((\d{1,3}.){3}\d{1,3}(:\d+)?)

Group 4((\d{1,3}.){3}\d{1,3}(:\d+)?)

Group 5(\d{1,3}.){3}

{3}repeats the group contents below exactly 3 times:

\d{1,3}a digit, repeated between 1 and 3 times

.any character (except for line terminators)

\d{1,3}a digit, repeated between 1 and 3 times

Group 6(:\d+)?

?repeats the group contents below at most once:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\d+a digit, repeated at least once

2nd Alternative(\w|\d|)+

Group 7(\w|\d|)+

+repeats the group contents below at least once:

1st Alternative\w

\wany word character

2nd Alternative\d

\da digit

3rd Alternative — matches an empty string

3rd Alternative((\[([a-f0-9]{1,4}:{1,2}){1,4}([a-f0-9]{1,4})\])(:\d+)?)

Group 8((\[([a-f0-9]{1,4}:{1,2}){1,4}([a-f0-9]{1,4})\])(:\d+)?)

Group 9(\[([a-f0-9]{1,4}:{1,2}){1,4}([a-f0-9]{1,4})\])

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Group 10([a-f0-9]{1,4}:{1,2}){1,4}

{1,4}repeats the group contents below between 1 and 4 times:

Character Class[a-f0-9]{1,4}

{1,4}matches between 1 and 4 characters from the set below:

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

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

:{1,2}the literal : (58₁₀ / 72₈ / 3A₁₆) , repeated between 1 and 2 times

Group 11([a-f0-9]{1,4})

Character Class[a-f0-9]{1,4}

{1,4}matches between 1 and 4 characters from the set below:

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

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

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Group 12(:\d+)?

?repeats the group contents below at most once:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\d+a digit, repeated at least once

.any character (except for line terminators)

\w+any word character, repeated at least once

$end of line

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

^(ldap(s)?:\/\/)(((\d{1,3}.){3}\d{1,3}(:\d+)?)|(\w|\d|)+|((\[([a-f0-9]{1,4}:{1,2}){1,4}([a-f0-9]{1,4})\])(:\d+)?)).\w+$

Test String
New

ldap://127.0.0.1:389
ldap://127.0.0.1
ldap://mydomain.test
ldaps://[fe80:4049:92ff:fe44:4bd1]:5060
ldap://[fe80::4bd1]:5060

Regular Expressions 101

Regular Expression

Test String
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Regular Expression

Test StringNew

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