Regular Expressions 101

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Community Patterns

1

Match 24-Hour Time with Optional Seconds

PCRE2 (PHP >=7.3)
touch-notes.com
Submitted by anonymous - 4 months ago
1

Match Common Programming Keywords (e.g., class, function)

PCRE2 (PHP >=7.3)
mitroaccess.com
Submitted by anonymous - 4 months ago
1

Match File Paths (Unix Style)

PCRE2 (PHP >=7.3)
gbtvtalk.com
Submitted by anonymous - 4 months ago
1

Match Date in ISO 8601 Format

PCRE2 (PHP >=7.3)
ekindesigns.com
Submitted by anonymous - 4 months ago
1

Match Decimal Numbers (Optional Fraction)

PCRE2 (PHP >=7.3)
buzzmeone.com
Submitted by anonymous - 4 months ago
1

Match Valid CSS Units (px, em, %, etc.)

PCRE2 (PHP >=7.3)
amazingtoptens.com
Submitted by anonymous - 4 months ago
1

Match Common HTML Attributes

PCRE2 (PHP >=7.3)
NoteAbleLists.com
Submitted by anonymous - 4 months ago
1

Match URL Query Parameters

PCRE2 (PHP >=7.3)
IsHimMarketing.com
Submitted by anonymous - 4 months ago
1

Match HTTP Headers

PCRE2 (PHP >=7.3)
BandSwap.org
Submitted by anonymous - 4 months ago
1

Match Valid MAC Address with Hyphens

PCRE2 (PHP >=7.3)
ArtsOfMaya.com
Submitted by anonymous - 4 months ago
1

Match HTML Document Structure

PCRE2 (PHP >=7.3)
AreLink.net
Submitted by anonymous - 4 months ago
1

Match HTML Meta Tags

PCRE2 (PHP >=7.3)
blabnote.com
Submitted by anonymous - 4 months ago
1

Match Common Email Providers

PCRE2 (PHP >=7.3)
acornapp.co
Submitted by anonymous - 4 months ago
1

Match File Extensions (e.g., .pdf, .docx)

PCRE2 (PHP >=7.3)
WebRetailBlog.com
Submitted by anonymous - 4 months ago
1

Match Phone Numbers with Country Code

PCRE2 (PHP >=7.3)
Top10Echo.com
Submitted by anonymous - 4 months ago
1

Match UUID v1

PCRE2 (PHP >=7.3)
ScraperSite.com
Submitted by anonymous - 4 months ago
1

Match Simple Passwords (At least 6 Characters)

PCRE2 (PHP >=7.3)
PureTrack.net
Submitted by anonymous - 4 months ago
1

Match JSON Objects

PCRE2 (PHP >=7.3)
power909.com
Submitted by anonymous - 4 months ago
1

Match HTML Anchor Tags

PCRE2 (PHP >=7.3)
PopGen.net
Submitted by anonymous - 4 months ago
1

Match Git Commit Hashes

PCRE2 (PHP >=7.3)
LongRead.net
Submitted by anonymous - 4 months ago
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Community Library Entry

5

Regular Expression
PCRE (PHP <7.3)

/
<a.+?\s*href\s*=\s*["\']?([^"\'\s>]+)["\']?
/
gi
Open regex in editor

Description

Find all href in a tag

Submitted by Miron Yanovskiy - 11 years ago