regex101: PCRE2 (PHP) Match Workspace

Pro

^start of line

Group 1( ((?:22[0-3]|2([0-1])?\d?|([1-9][0-9]?|1[0-9]{2}))\.) # a group, 1-223 with "." ((?:25[0-5]|2[0-4]\d|[01]?(\d{0,2}))\.){2} # b and c groups 0-255 with "." ((25[0-5]|2[0-4]\d|[01]?(\d{0,2})) # d group, ends with optional netmask instead of "." // i tried making this non-optional as a group to solve my problem. (\/([89]|[12]\d|3[0-2]))?) # netmask ,?\h?){1,50}

{1,50}repeats the group contents below between 1 and 50 times:

Group 2((?:22[0-3]|2([0-1])?\d?|([1-9][0-9]?|1[0-9]{2}))\.)

Non-Capturing Group(?:22[0-3]|2([0-1])?\d?|([1-9][0-9]?|1[0-9]{2}))

1st Alternative22[0-3]

22the literal text 22

Character Class[0-3]

0-3one character from 0 (48₁₀) to 3 (51₁₀)

2nd Alternative2([0-1])?\d?

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Group 3([0-1])?

?repeats the group contents below at most once:

Character Class[0-1]

0-1one character from 0 (48₁₀) to 1 (49₁₀)

\d?optionally matches a digit

3rd Alternative([1-9][0-9]?|1[0-9]{2})

Group 4([1-9][0-9]?|1[0-9]{2})

1st Alternative[1-9][0-9]?

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

Character Class[0-9]?

?matches at most one character from the set below:

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

2nd Alternative1[0-9]{2}

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-9]{2}

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

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Comment: a group, 1-223 with "."

Group 5((?:25[0-5]|2[0-4]\d|[01]?(\d{0,2}))\.){2}

{2}repeats the group contents below exactly 2 times:

Non-Capturing Group(?:25[0-5]|2[0-4]\d|[01]?(\d{0,2}))

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 Alternative[01]?(\d{0,2})

Character Class[01]?

?matches at most one character from the set below:

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Group 6(\d{0,2})

\d{0,2}a digit, repeated between 0 and 2 times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Comment: b and c groups 0-255 with "."

Group 7((25[0-5]|2[0-4]\d|[01]?(\d{0,2})) # d group, ends with optional netmask instead of "." // i tried making this non-optional as a group to solve my problem. (\/([89]|[12]\d|3[0-2]))?)

Group 8(25[0-5]|2[0-4]\d|[01]?(\d{0,2}))

Comment: d group, ends with optional netmask instead of "." // i tried making this non-optional as a group to solve my problem.

Group 10(\/([89]|[12]\d|3[0-2]))?

Comment: netmask

,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

\h?optionally matches any horizontal whitespace character

$end of line

Comment: allow comma separated, optional space between, up to 50 IPs

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

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

25 tokens

Regular Expression

^(
  ((?:22[0-3]|2([0-1])?\d?|([1-9][0-9]?|1[0-9]{2}))\.) # a group, 1-223 with "."
   ((?:25[0-5]|2[0-4]\d|[01]?(\d{0,2}))\.){2} # b and c groups 0-255 with "."
((25[0-5]|2[0-4]\d|[01]?(\d{0,2})) # d group, ends with optional netmask instead of "." // i tried making this non-optional as a group to solve my problem.
(\/([89]|[12]\d|3[0-2]))?) # netmask
,?\h?){1,50}$ # allow comma separated, optional space between, up to 50 IPs

New

1.1.1.
1.1.1.2
1.1.1.2/23
1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23

Extraction

1.1.1.
1.1.1.2
1.1.1.2/23
1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23,1.1.1.2/23