Regular Expressions 101

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Regular Expressions 101

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1

RFC-1034- and RFC-2181-compliant FQDN extractor

The specification for this regex is based upon the extracts from RFC 1034 and RFC 2181 below. It is also assumed that you are trying to extract the FQDN from a pipe-delimited string. If this is not the case then you will need to adjust the regex as necessary by either removing the pipe character o...

Submitted by 0jag - 6 years ago

1

Extract the only the Nth field from a delimited string

The aim of this regex is to extract only the Nth field from a delimited string. In the example provided the delimited is the pipe character. You will have to substitute the pipe character for whatever delimiter you are using.

Submitted by 0jag - 6 years ago

1

Remove Markdown Links

no description available

Submitted by anonymous - 6 years ago

1

Make PHP var_dump() output more compact

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 - 6 years ago

1

URL Slugs Optimized

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 - 6 years ago

1

A revised e-mail validation regular expression

This one allows to begin with a digit, however, sometimes e-mail should begin with an *English letter *

Submitted by anonymous - 6 years ago

1

Youtube ID Extractor

no description available

Submitted by anonymous - 6 years ago

1

Localhost/private ip origin check

Used by CORS to check for localhost/private IP origins Check out the unit tests at /r/2Ofume/1/tests

Submitted by ngokimphu - 6 years ago

1

Formatar CPF

Retorna um cpf no formato 123.456.789-11. Cpf de entrada deve conter apenas números

Submitted by anonymous - 6 years ago

1

Matching email addresses per RFC5322

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 - 6 years ago

1

Word Wrap examples

Four examples of word wrapping at the 80 character mark, each one taking fewer steps than the last. Comment and uncomment lines with # to see the difference between versions. Optimization discussions welcome!

Submitted by OnlineCop - 6 years ago

1

Matching an Saudi Postal Code

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 - 6 years ago

1

Email matching with a grain of salt

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 - 6 years ago

1

Basic DOI

no description available

Submitted by anonymous - 6 years ago

1

Contraseña Fuerte

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 - 6 years ago

1

Unix ANSI escape codes

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 - 6 years ago

1

Check list of integers numbers separated by comma

Check list of integers numbers separated by comma Ex: "1, 2, 4, 6" >> OK "99" >> OK "a, b, c" >> WRONG...

Submitted by anonymous - 6 years ago

1

French Phone Number Validation

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 - 6 years ago

1

Validate and decompose email address (English alphabet compliant)

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 - 6 years ago

1

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

Looks for the last single space in a line of text.

Submitted by anonymous - 6 years ago

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