Regular Expressions 101

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Community Patterns

1

MAC address capturing

Python
Captures MAC addressess in any format: aa bb cc dd ee ff aa-bb-cc-dd-ee-ff aa:bb:cc:dd:ee:ff aabb.ccdd.eeff aabbccddeeff
Submitted by Gilian - 9 years ago
1

file name without extension

PCRE (PHP <7.3)
no description available
Submitted by sl - 9 years ago
1

Brazilian Phone number

ECMAScript (JavaScript)
With optional 9 digit
Submitted by Matheus Gambati - 9 years ago
1

Isolate string in double or single quotes

PCRE (PHP <7.3)
Isolate strings inside double or single quotes
Submitted by garsax - 9 years ago
1

10-digit phone number with hyphens

PCRE (PHP <7.3)
Such as 333-333-1234. Does not test for valid sequences of digits. E.g. 000-000-0000 would pass.
Submitted by anonymous - 9 years ago
1

Tag Text

Python
Match text between html tags
Submitted by Si - 9 years ago
1

URL does not start with correct name

PCRE (PHP <7.3)
APPFW BLock URL
Submitted by anonymous - 9 years ago
1

Find multiline links a HTML tag

Python
Find multiline links a HTML tag
Submitted by CyberLight - 9 years ago
1

find file name with file extension

PCRE (PHP <7.3)
find file name with file extension
Submitted by rainyseason - 9 years ago
1

Find untranslated strings, angular

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 9 years ago
1

Decimal Numbers (+/-)

PCRE (PHP <7.3)
no description available
Submitted by Zain - 9 years ago
1

regular expression to match word starting with space

Python
no description available
Submitted by anonymous - 9 years ago
1

allow only alpabets digits and special characters

ECMAScript (JavaScript)
allow only alpabets digits and special characters
Submitted by anonymous - 9 years ago
1

numbers between 200 and 3000

PCRE (PHP <7.3)
no description available
Submitted by Bino - 9 years ago
1

Top Level Domain (TLD)

PCRE (PHP <7.3)
Select TLD (.com, .fr ...) from url or domain
Submitted by Etienne - 9 years ago
1

US and Mexico Phone Numbers with Extensions

PCRE (PHP <7.3)
no description available
Submitted by Katrina - 9 years ago
1

Replace Czech accents, Part 1

Python
The result of this put as input into part 2.
Submitted by Premysl Karbula - 9 years ago
1

html

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
1

url

Python
no description available
Submitted by oniro - 9 years ago
1

Space replacement

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
1...6364656667...900

Community Library Entry

1

Regular Expression
ECMAScript (JavaScript)

/
^[a-zA-Z]\d{4}$
/
gm
Open regex in editor

Description

The CMS, who maintain these codes, describe the format as:- "HCPCS Level II codes (also known as alpha-numeric codes) consist of a single alphabetical letter followed by 4 numeric digits." (https://www.cms.gov/medicare/coding-billing/healthcare-common-procedure-system) NOTE: This regex will not identify HCPCS Level I codes (AKA CPT codes) Also, some sources say the single letter ranges only from A-V (this regex follows A-Z) Finally, this regex does not match procedure modifiers, which are 2 digit codes that follow a HCPCS code (with hyphen).
(https://www.aapc.com/resources/what-are-medical-coding-modifiers) A separate regex has been created on regex101 supporting these modifiers

Submitted by Richard Baxter - 5 months ago