Please enable JavaScript to use this web application.
Regular
Expressions
101
Social
Donate
Info
Regex Editor
Community Patterns
Account
Regex Quiz
Settings
Order By
Most Recent
Highest Score
Lowest Score
Most upvotes
Most downvotes
Filter by Flavor
PCRE2 (PHP >=7.3)
PCRE (PHP <7.3)
ECMAScript (JavaScript)
Python
Golang
Java 8
.NET 7.0 (C#)
Rust
Sponsors
There are currently no sponsors.
Become a sponsor today!
Community Patterns
Search among 2,600 community submitted regex patterns...
1
get video id from youtube link
Golang
no description available
Submitted by
RyuaNerin
-
8 years ago
(Last modified 10 months ago)
1
...
128
129
130
IPv4 validation using recursion
1
Regular Expression
PCRE (PHP <7.3)
/
^
(
2
[
0
-
4
]
\d
|
25
[
0
-
5
]
|
1
\d\d
|
\d\d
?
)
\.
(?1)
\.
(?1)
\.
(?1)
$
/
gm
Open regex in editor
Description
Validate IPv4 addresses using PCRE's recursion patterns.
Submitted by
Captain Haddock
-
9 years ago