regex101: PCRE2 (PHP) Match Workspace

(?i)applies the following effective flags to the remainder of the pattern: gmi

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Group ipv6(?<ipv6>(?:[\da-f]{0,4}:){1,7}(?:(?<ipv4>(?:(?:25[0-5]|2[0-4]\d|1?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|1?\d\d?))|[\da-f]{0,4}))

Non-Capturing Group(?:[\da-f]{0,4}:){1,7}

{1,7}repeats the group contents below between 1 and 7 times:

Character Class[\da-f]{0,4}

{0,4}matches between 0 and 4 characters from the set below:

\da digit

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

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Non-Capturing Group(?:(?<ipv4>(?:(?:25[0-5]|2[0-4]\d|1?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|1?\d\d?))|[\da-f]{0,4})

1st Alternative(?<ipv4>(?:(?:25[0-5]|2[0-4]\d|1?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|1?\d\d?))

Group ipv4(?<ipv4>(?:(?:25[0-5]|2[0-4]\d|1?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|1?\d\d?))

Non-Capturing Group(?:(?:25[0-5]|2[0-4]\d|1?\d\d?)\.){3}

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

Non-Capturing Group(?:25[0-5]|2[0-4]\d|1?\d\d?)

1st Alternative25[0-5]

25the literal text 25

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

2nd Alternative2[0-4]\d

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

\da digit

3rd Alternative1?\d\d?

1?optionally matches the literal 1 (49₁₀ / 61₈ / 31₁₆)

\da digit

\d?optionally matches a digit

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:25[0-5]|2[0-4]\d|1?\d\d?)

1st Alternative25[0-5]

25the literal text 25

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

2nd Alternative2[0-4]\d

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

\da digit

3rd Alternative1?\d\d?

1?optionally matches the literal 1 (49₁₀ / 61₈ / 31₁₆)

\da digit

\d?optionally matches a digit

2nd Alternative[\da-f]{0,4}

Character Class[\da-f]{0,4}

{0,4}matches between 0 and 4 characters from the set below:

\da digit

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

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

(?i)(?<ipv6>(?:[\da-f]{0,4}:){1,7}(?:(?<ipv4>(?:(?:25[0-5]|2[0-4]\d|1?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|1?\d\d?))|[\da-f]{0,4}))

New

2001:db8:3333:4444:5555:6666:7777:8888
2001:db8:3333:4444:CCCC:DDDD:EEEE:FFFF
2001:0db8:0001:0000:0000:0ab9:C0A8:
fffe:3465:efab:23fe:2235:6565
2001:0000:6dcd:8c74:::ac32:6a1
2345:0425:2CA1:::5673:23b5
2001:db8:1::ab9:C0A8:102
2001:db8::1234:5678
FF02:0:0:0:0:0:0:2
fdf8:f53b:82e4::53
fe80::200:5aee:feaa:20a2
2001:0000:4136:e378:
8000:63bf:3fff:fdd2
2001:db8::
::1234:5678
2000::
2001:db8:a0b:12f0::1
2001:4:112:cd:65a:753:0:a1
2001:0002:6c::430
2001:5::
fe08::7:8
2001:10:240:ab::a
2002:cb0a:3cdd:1::1
2001:db8:8:4::2
ff01:0:0:0:0:0:0:2


1:2:3:4:5:6:7:8
1::3:4:5:6:7:8
1::4:5:6:7:8
1:2:3::5:6:7:8
1::7:8
1:2:3:4:5::7:8
1:2:3:4:5::8
::2:3:4:5:6:7:8
::8
::
::1

::ffff:192.0.2.47
::255.255.255.255
::ffff:255.255.255.255 
::ffff:0:255.255.255.255
2001:db8:3:4::192.0.2.33
64:ff9b::192.0.2.33
2001:db8:3333:4444:5555:6666:1.2.3.4
24a6:57:c:36cf:0000:5efe:109.205.140.116
::11.22.33.44
::10.0.0.3
2001:db8::123.123.123.123
::ffff:10.0.0.3
::1234:5678:91.123.4.56
::1234:5678:1.2.3.4
2001:db8::1234:5678:5.6.7.8
2001:db8:3:4:5::192.0.2.33

Regular Expressions 101

Regular Expression

Extraction