Regular Expressions 101

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Community Patterns

-2

ignore code comments

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 10 years ago
-2

Username

ECMAScript (JavaScript)
^[_a-zA-Z0-9]+$ how to make regex username with underscore. i'm using c# but this regex isn't working.
Submitted by anonymous - 10 years ago
-2

Detect DNS Zones with Authoritative Nameservers

PCRE (PHP <7.3)
This can be used to find all zone files that contain authoritative nameservers - e.g. perl -ne 'print if /^([\w.]+\.)\s+.+\sNS\s.+\1/' /var/named/*.db | awk '{print $1}' | sort | uniq
Submitted by Santrix - 10 years ago
-2

last, first middle name parser

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 10 years ago
-2

Test Balanced Parentheses

PCRE (PHP <7.3)
no description available
Submitted by Me - 10 years ago
-2

regex for redirect url

PCRE (PHP <7.3)
no description available
Submitted by igor - 10 years ago
-2

cofor

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 10 years ago
-2

Test email

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 10 years ago
-2

Match website - http:|https://i.imgur.com

ECMAScript (JavaScript)
no description available
Submitted by ghrifter - 10 years ago
-2

Match Content-Range response header

ECMAScript (JavaScript)
Matches the Content-Range response header format -[end]/[total|*]
Submitted by mdezem - 10 years ago
-2

Find a IPV4

ECMAScript (JavaScript)
no description available
Submitted by Jon Dotsoy - 10 years ago
-2

Any telephone number with region and country in any format

ECMAScript (JavaScript)
Matches any telephone number with region parentesis, or separated by points or dash or spaces
Submitted by https://co.linkedin.com/in/andresfelipecardona - 10 years ago
-2

Zipcode Mundial

PCRE (PHP <7.3)
no description available
Submitted by Mariela Gonzalez - 10 years ago
-2

Detect HTML Linebreak Tags

ECMAScript (JavaScript)
Detect various possible HTML linebreak tags (eg. )
Submitted by @benhodgson - 10 years ago
-2

Check syntax port ACL VNG

ECMAScript (JavaScript)
no description available
Submitted by nguyenvq - 10 years ago
-2

posix

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 10 years ago
-2

spot2-test

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 10 years ago
-2

Host and domains

Python
no description available
Submitted by anonymous - 10 years ago
-2

Get HTML DIV content

PCRE (PHP <7.3)
Get the content of a DIV HTML Tag.
Submitted by Ivan Milazzotti - 10 years ago
-2

String with 1 lowercase 1 uppercase & 1 digit

ECMAScript (JavaScript)
Regular expression for a validating a string with following rules: at least one lowercase letter at least one upper case letter at least one digit length between 6 and 14...
Submitted by Rasmita Dash - 10 years ago
1...45678...902

Community Library Entry

-1

Regular Expression
PCRE (PHP <7.3)

/
^(?: (?:[\pL\pN\pS-\.])+(?:\.?(?:[\pL]|xn\-\-[\pL\pN-]+)+) # a domain name | # or \d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3} # a IP address | # or \[ (?:(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){6})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:::(?:(?:(?:[0-9a-f]{1,4})):){5})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){4})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,1}(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){3})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,2}(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){2})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,3}(?:(?:[0-9a-f]{1,4})))?::(?:(?:[0-9a-f]{1,4})):)(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,4}(?:(?:[0-9a-f]{1,4})))?::)(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,5}(?:(?:[0-9a-f]{1,4})))?::)(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,6}(?:(?:[0-9a-f]{1,4})))?::)))) \] # a IPv6 address )$
/
ixu
Open regex in editor

Description

Validates the format of IPv4/IPv6 hostnames as well as domain names.

Submitted by anonymous - 9 years ago