Regular Expressions 101

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Community Patterns

1

Make PHP var_dump() output more compact

PCRE (PHP <7.3)
The PHP function var_dump() provides debugging output, but has more line-breaks than is needed for readability. This regex strips out the (in my eyes) unnecessary line-breaks. Good in a self written debugging method in combination with ob_start()and ob_get_contents().
Submitted by Doqnach - 7 years ago
1

URL Slugs Optimized

PCRE (PHP <7.3)
This slug regex is optimized using strictly my own opinions. Slugs: Should be english, alphanumeric phrases separated with a single dash. Should not contain single alpha character between dashes....
Submitted by Jordon Baade - 7 years ago
1

A revised e-mail validation regular expression

PCRE (PHP <7.3)
This one allows to begin with a digit, however, sometimes e-mail should begin with an *English letter *
Submitted by anonymous - 7 years ago
1

Date checker for X values

ECMAScript (JavaScript)
Work in progress
Submitted by anonymous - 7 years ago
1

Youtube ID Extractor

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 7 years ago
1

Phone numbers and/or extensions(relaxed)

ECMAScript (JavaScript)
Useful for phone number extraction
Submitted by hslayer - 7 years ago
1

Localhost/private ip origin check

PCRE (PHP <7.3)
Used by CORS to check for localhost/private IP origins Check out the unit tests at /r/2Ofume/1/tests
Submitted by ngokimphu - 7 years ago
1

Formatar CPF

PCRE (PHP <7.3)
Retorna um cpf no formato 123.456.789-11. Cpf de entrada deve conter apenas números
Submitted by anonymous - 7 years ago
1

Matching email addresses per RFC5322

PCRE (PHP <7.3)
The BNF rules from RFC 5322 transformed to PCRE by Nikita Popov and described in the post http://nikic.github.io/2012/06/15/The-true-power-of-regular-expressions.html.
Submitted by Michael Musson - 7 years ago
1

Matching an Saudi Postal Code

PCRE (PHP <7.3)
Saudi Postal Code has five digits, if you would to have more information check the below: +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ First Digit (Postal Regions): "The postal region number is represented by the first digit of the postal code" ...
Submitted by Fares Alarabi - 7 years ago
1

Email matching with a grain of salt

PCRE (PHP <7.3)
Inspired by Micheal Musson entry Wich was hard to use in regex flavours that don't support recursion (C# engine doesn't) i've build my own simpler version wich matches what i would accept as validation entry
Submitted by Luigi Trabacchin - 7 years ago
1

Basic DOI

Python
no description available
Submitted by anonymous - 7 years ago
1

Contraseña Fuerte

PCRE (PHP <7.3)
Valida que la contraseña deba estar compuesta por una mayúscula, minúscula y números con un rango de caracteres desde 8 hasta 16 dígitos. Ejemplo Aropd123 Argpd 123
Submitted by Nelson Wandurraga - 7 years ago
1

Unix ANSI escape codes

PCRE (PHP <7.3)
Unix ANSI escape codes Hi , in my Terminal project in want a method to find (Unix ANSI escape codes) and run its command. For More information : https://en.wikipedia.org/wiki/ANSI_escape_code...
Submitted by Shahin Pendar , shahinpendar@gmail.com - 7 years ago
1

Check list of integers numbers separated by comma

PCRE (PHP <7.3)
Check list of integers numbers separated by comma Ex: "1, 2, 4, 6" >> OK "99" >> OK "a, b, c" >> WRONG...
Submitted by anonymous - 7 years ago
1

French Phone Number Validation

PCRE (PHP <7.3)
Accept several kind of format, more or less usual. And refuse incorrect formats. Prefix: 0033 / +33 / (0) / 0 Number: collapsed / group by 2 / group by 3 Separator: space / dot / dash
Submitted by RonanKER - 7 years ago
1

Validate and decompose email address (English alphabet compliant)

PCRE (PHP <7.3)
If you understand the regexp, you can adjust it to your need. restrict special characters to .%_'- (localpart) limit length of each part and the whole to reasonable size supports 'XN' tld If you need help, read http://www.regular-expressions.info/email.html See also https://www.debuggex.com/r/9cdaaw...
Submitted by RonanKER - 7 years ago
1

Capture the last space in a line of text with Negative Lookback

PCRE (PHP <7.3)
Looks for the last single space in a line of text.
Submitted by anonymous - 7 years ago
1

Acts

PCRE (PHP <7.3)
Extract Act names from statements
Submitted by anonymous - 7 years ago
1

Euro prices with steps of 5000 (e.g 5.000, 10.000 - 255.000)

PCRE (PHP <7.3)
To validate a price of 5.000 and steps of 5.000 thereafter. (e.g 5.000, 10.000, 15.000 etc) including a euro sign. If anyone has any improvements let me know, this is what i just came up with to solve a problem i have on WordPress Contact Form 7.
Submitted by anonymous - 7 years ago
1...631632633634635...738

remove comments from php code

11

Regular Expression
PCRE (PHP <7.3)

@
(?(DEFINE) (?<next_open_tag> [^<]*+ (?i: <++[^<?s][^<]* | <++(?! \?php | \?= | script\s*language\s*=\s*([\'"]?)php\g{-1}\s*> ) [^<]* )*+ (?i: <++(?: \?php | \?= | [^>]+ ) | \z ) ) ) \A (?&next_open_tag) \K | [^'"`/#<?]*+ (?: '(?:[^'\\]+|\\.)*+' [^\'"`/#<?]* | "(?:[^"\\]+|\\.)*+" [^\'"`/#<?]* | `(?:[^`\\]+|\\.)*+` [^\'"`/#<?]* | /(?![/*]) [^\'"`/#<?]* # stop for // or /* | # if close tag ?> \? (?: >(?&next_open_tag)[^\'"`/#<?]* | ) | < (?: # heredoc or nowdoc <<[\ \t]*([\'"]?) ([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*) \g{-2}[\ \t]*[\r\n] (?-s:.*+[\r\n])*? \g{-1}[\r\n;] [^\'"`/#<?]* | (?i: /script\s*>) (?&next_open_tag) [^\'"`/#<?]* | [^\'"`/#<?]* ) )*+ \K (?: (?://|\#)(?:[^\n?]+|\?(?!>))*+ # single line comment // и # | /\*(?:[^*]+|\*(?!/))*+\*/ # multi line comment /* */ )?
@
xsg
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Description

no description available

Submitted by anonymous - 9 years ago