Regular Expressions 101

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Community Patterns

-2

Match whitespace and colon, except in specific words

ECMAScript (JavaScript)
For string splitting / deconstructing
Submitted by anonymous - 2 years ago
0

长宽高

PCRE2 (PHP >=7.3)
长宽高
Submitted by mouxan - 2 years ago
0

KPI Dash Drop-In Image Compliance

Python
This regex is designed for end users to test if there image file is name compliant.
Submitted by Jeremiah Carlson - 2 years ago
0

REGEX OS

Java 8
Regex para extrair titulo e descrição duma OS
Submitted by anonymous - 2 years ago
0

Password

PCRE2 (PHP >=7.3)
Password includes a,A,1,!$#%
Submitted by anonymous - 2 years ago
0

All kinds of stupid Content-Types

PCRE2 (PHP >=7.3)
Some applications send incorrect HEADERS:Content-Type. If it needs to pass the checks (for example, on WAF) this regex maybe used
Submitted by anonymous - 2 years ago
0

Email input validation

ECMAScript (JavaScript)
Regex to validate an email input with the following rules... Whole address: Up to 254 characters. Case insensitive. Username and domain separated by @ symbol....
Submitted by chCharly - 2 years ago (Last modified 2 years ago)
0

IPv4 input field validator

PCRE (PHP <7.3)
Use It for partial/complete IPv4 address input text checking. OK examples: 19 / 192. / 192.168.1 / 192.168.1.1 / 0.0.0.0 KO examples: 1A / 01 / 192.168..1
Submitted by José Luis García Morillo - 2 years ago
0

Match any number greater than 14 using regexp

ECMAScript (JavaScript)
Any number greater than 14 means: Any number with 3 or more digits with possible leading 0's Any number with 2 digits where the first digit in in the character class [2-9] Any number with 2 digits where the first digit is 1 and the second digit in in the character class [5-9] Inspired by:...
Submitted by anonymous - 2 years ago
0

Camel Case - no digits allowed

PCRE2 (PHP >=7.3)
To be proper camel case a word with no digits allowed, a word: MUST start with a lower case alphabet (a through z) MUST have no digits (0 - 9) MUST have no spaces, punctuation or special characters CAN have at most 1 uppercase alphabet in a row MAY end in an uppercase alphabet...
Submitted by roubles - 2 years ago (Last modified 2 years ago)
0

Camel Case - digits allowed

PCRE2 (PHP >=7.3)
To be proper camel case (with digits allowed) a word: MUST start with a lower case alphabet (a through z) MUST have no spaces, punctuation or special characters CAN have at most 1 uppercase alphabet in a row MAY end in an uppercase alphabet...
Submitted by roubles - 2 years ago
0

Camel Case - no digits allowed - Upto 3 upper case letters

.NET 7.0 (C#)
To be proper camel case a word with no digits allowed and upto 3 upper case letters, a word: Must start with a lower case alphabet (a through z) Must have no digits (0 - 9) MUST have no spaces, punctuation or special characters Can have at most 3 uppercase alphabets in a row Can end in an uppercase ...
Submitted by anonymous - 2 years ago (Last modified 2 years ago)
0

Camel Case - digits allowed - Upto 3 upper case letters

.NET 7.0 (C#)
Camel Case - digits allowed - Upto 3 upper case letters To be proper camel case a word with digits allowed and upto 3 upper case letters, a word: MUST start with a lower case alphabet (a through z) MUST have no spaces, punctuation or special characters CAN have at most 3 uppercase alphabets in a ro...
Submitted by anonymous - 2 years ago
0

Pascal Case - no digits allowed

ECMAScript (JavaScript)
To be proper pascal case with no digits allowed, a word: MUST start with an upper case alphabet (A through Z) MUST have no digits (0 - 9) MUST have no spaces, punctuation or special characters CAN have at most 1 uppercase alphabet in a row CAN end in an uppercase alphabet...
Submitted by anonymous - 2 years ago (Last modified 2 years ago)
0

Pascal Case - digits allowed

ECMAScript (JavaScript)
To be proper pascal case a word with digits allowed and with upto 3 upper case letters, a word: MUST start with an upper case alphabet (A through Z) MUST have no digits (0 - 9) MUST have no spaces, punctuation or special characters CAN have at most 1 uppercase alphabet in a row CAN end in an upperca...
Submitted by anonymous - 2 years ago
0

Pascal Case - no digits allowed - Upto 3 upper case letters

ECMAScript (JavaScript)
To be proper pascal case a word with no digits allowed and with upto 3 upper case letters, a word: MUST start with an upper case alphabet (A through Z) MUST have no digits (0 - 9) MUST have no spaces, punctuation or special characters CAN have at most 3 uppercase alphabets in a row CAN end in an upp...
Submitted by anonymous - 2 years ago (Last modified 2 years ago)
0

Pascal Case - digits allowed - Upto 3 upper case letters

ECMAScript (JavaScript)
To be proper pascal case a word with digits allowed and with upto 3 upper case letters, a word: MUST start with an upper case alphabet (A through Z) MUST have no spaces, punctuation or special characters CAN have at most 3 uppercase alphabets in a row CAN end in an uppercase alphabet ...
Submitted by anonymous - 2 years ago
0

PasCamelCase

PCRE2 (PHP >=7.3)
PasCamelCase A combination of pascal and camel case. PasCamelCase is a lenient case style that is allows a phrase to use either pascal case or camel case rules. In addition, PasCamelCase allows for 2-3 letter acronyms such as Rules For a phrase to be valid PasCamelCase it:...
Submitted by anonymous - 2 years ago (Last modified 2 years ago)
0

111

ECMAScript (JavaScript)
111
Submitted by Alex - 2 years ago
0

Validation

PCRE2 (PHP >=7.3)
^a-zA-Z+@[a-zA-Z]{3,20}\.[a-z]{3}$
Submitted by anonymous - 2 years ago
1...831832833834835...900

Community Library Entry

0

Regular Expression
PCRE2 (PHP >=7.3)

/
^([A-Z](([A-Z]{1,2}[a-z0-9]+)+([A-Z]{1,3}[a-z0-9]+)*[A-Z]{0,3}|([a-z0-9]+[A-Z]{0,3})*|[A-Z]{1,2}))$|^([a-z][a-z0-9]*(([A-Z]{1,3}[a-z0-9]+)*[A-Z]{0,3}|([a-z0-9]+[A-Z]{1,3})*|[A-Z]{1,3}))$
/
gm
Open regex in editor

Description

PasCamelCase

A combination of pascal and camel case. PasCamelCase is a lenient case style that is allows a phrase to use either pascal case or camel case rules.

In addition, PasCamelCase allows for 2-3 letter acronyms such as IOStream, StreamIO, DeviceID, deviceID, AwsVPC, awsVPC, ```serialNO``. This rule is inspired by Microsoft's Capitalization Convention

Rules

For a phrase to be valid PasCamelCase it:

  • MUST start with a lower or upper case alphabet (a through z or A through Z)
  • MUST have no spaces, punctuation or special characters
  • MAY contain digits 0 - 9
  • CAN have at most 3 uppercase alphabets in a row
  • CAN end in an uppercase alphabet

The following are all valid PasCamelCase phrases:

  • a
  • aG
  • camelCase
  • camelCasE
  • aGa
  • alphabet
  • camelCase
  • cP3
  • a1
  • a1G
  • a123
  • camelCa1
  • camel01C
  • streamIO
  • deviceID
  • serialNO
  • awsVPC
  • A
  • Ag
  • AaA
  • Aabc123
  • Pascal2Case
  • Pascal2CaseA
  • Mode2A
  • Mode2A2
  • Mode2A2A
  • SupportsIpv6OnIos
  • IOStream
  • StreamIO
  • IOStream
  • DeviceID
  • AwsVPC
  • DeviceSNS
  • CreateAMode
  • CreateBMode
  • ABCabcABCabc
  • ABCabcABCabcA
  • Camel01CC01

The following are not PasCamelCase phrases:

  • 2PascalCase
  • CamelCa_1
  • HELLO
  • HTMLParser
  • AabcABCDabcABCD
  • streamIOIO
Submitted by anonymous - 2 years ago (Last modified 2 years ago)