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This article mainly explains "the matching method of IP address regular expression". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn the matching method of IP address regular expression.

Regular expressions (Regular Expression, often abbreviated as regex, regexp, or RE in code) is a concept in computer science. Regular expressions use a single string to describe and match a series of strings that conform to a syntactic rule. In many text editors, regular expressions are often used to retrieve and replace text that matches a certain pattern. Many programming languages support string manipulation using regular expressions. In many text editors, regular expressions are often used to retrieve and replace text that matches a certain pattern.

Regular expression

^ (25 [0-5] | 2 [0-4] [0-9] | [0-1] {1} [0-9] {2} | [1-9] {1} [0-9])\. (25 [0-5] | 2 [0-4] [0-9] | [0-1] {1} [0-9] {1} | [1-9] {1} | [1-9]) | | 0)\. (25 [0-5] | 2 [0-4] [0-9] | [0-1] {1} [0-9] {2} | [1-9] {1} [0-9] {1} | [1-9] | 2 [0-4] [0-9] | [0-1] {1} [0-9] {1} | [0-9]) $

Match 127.0.0.1 | 255.255.255.0 | 192.168.0.1

Mismatch 1200.5.4.3 | abc.def.ghi.jkl | 255.foo.bar.1

Regular expression

^ ((0 | 1 [0-9] {0rect 2} | 2 [0-9] {0rect 1} | 2 [0-4] [0-9] | 25 [0-5] | [3-9] [0-9] {0jue 1})\.) {3} (0 | 1 [0-9] {0jue 2} | 2 [0-9] {0jue 1} | 2 [0-4] [0-9] | 25 [0-5] | [3-9] [0-9] {0jue 1}) (? (\ /) 0-9] | [1-2] [0-9] | 3 [0-2]) |) $

Match 192.168.0.1 | 192.168.0.1 Universe 32 | 255.255.0.0 Uniplet1

Mismatch 010.0.0.0 | 192.168.0.1 Universe 33 | 256.0.1.55

Regular expression

^ (25 [0-5] | 2 [0-4] [0-9] | 1 [0-9] [0-9] | [0-9] {1 minute 2}) (\. (25 [0-5] | 2 [0-4] [0-9] | 1 [0-9] [0-9] | [0-9] {1} 2})) {3}

Match 97.67.44.20 | 199.154.37.214 | 127.0.0.1

Mismatch 63.125.94.287 | 140.370.a.187 | 94.923.1

Regular expression

/ ^ ([01]?\ d?\ d | 2 [0-4]\ d | 25 [0-5]) {3} ([01]?\ d?\ d | 2 [0-4]\ d | 25 [0-5])\ / (\ d {1} | [0-2] {1}\ d {1} | 3 [0-2]) $/

Matches 192.168.100.1swap 24 | 0.0.0.0 Universe 0

Does not match 192.168.100.1swap 33 | 0.0.0.0 cue 90

Regular expression

\ d +.\ d +.

Match 127.0.0.1 | 255.255.255.0 | 192.168.0.1

Does not match @ # .5.4.3 | abc.def.ghi.jkl | 255.foo.bar.1

Regular expression

^ ((\ d |\ d]\ d | [0-4]\ d | 2 [0-4]\ d | 25 [0-5])\. (\ d |\ d |\ d\ d | 2 [0-4]\ d | 25 [0-5])\. (\ d |\ d |\ d\ d | [0-1]\ d | 2 [0-4]\ d | 25 [0-5])\. (\ d |\ d\ d | [0-1]\ d\ d | 2 [0-4]\ d | 25 [0-5]) $

Match 1.198.0.1 | 100.10.0.1 | 200.200.123.123

Mismatch. 12.23 | a.23.345 | 400.500.300.300

Regular expression

^ (\ d {1pr 2} | 1\ d\ d | 2 [0-4]\ d | 25 [0-5])\. (\ d {1 pm 2} | 1\ d\ d | 2 [0-4]\ d | 25 [0-5])\. (\ d {0-4]\ d | 2 [0-4])\ d | 25 [0-5])\. (\ d {1J 2} | 1\ d\ d | 2 [0-4]\ d | 25 [0-5]) $

Match 0.0.0.0 | 255.255.255.02 | 192.168.0.136

Mismatch 256.1.3.4 | 023.44.33.22 | 10.57.98.23.

Regular expression

^ (http | https | ftp)\: / / ((25 [0-5] | 2 [0-4] [0-9] | 1 [0-9] [0-9] | [1-9] [0-9] | [0-9] | 2 [0-4] [0-9] | 1 [0-9] [0-9] | [1-9] [0-9]) | ([a-zA-Z0-9]) (com | net | org | edu | mil | gov | arpa | biz | name | coop | info | pro | museum | uk | me)) ((: [a-zA-Z0-9] *)? /? ([a-zA-Z0-9\ -\. _\?\) \'/\\ + &%\ $#\ = ~]) *) $

Match http://www.allkins.com | http://255.255.255.255 | http://allkins.com/page.asp?action=1

Do not match http://test.testing

Regular expression

^ ([0 # 2] * [0 # 9] +)\. ([0 # 2] * [0 # 9] +)\. ([0 # 2] * [0 # 9] +)\. ([0 # 2] * [0 # 9] +)) $

Match 113.173.40.255 | 171.132.248.57 | 79.93.28.178

Mismatch 189.57.135 | 14.190.193999 | A.N.D.233

Regular expression

\ b (([01]?\ d?\ d | 2 [0 # 4]\ d | 25 [0 # 5])\.) {3} ([01]?\ d?\ d | 2 [0 # 4]\ d | 25 [0 # 5])\ b

Match 217.6.9.89 | 0.0.0.0 | 255.255.255.255

Mismatch 256.0.0.0 | 0978.3.3.3 | 65.4t.54.3

At this point, I believe you have a deeper understanding of "the matching method of IP address regular expressions". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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