Grabs the ID for the regex101.com permalink code. If a revision number is provided, grab that as well.

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.

A quite neat regular expression for URLs, e-mails..., I found on Matthew O'Riordan's blog.

Validate and capture dateTime parts, includes validation for leap years, range 1000-2999. Fixed bug

Matches distorted email addresses and converts them back to real ones.

A neat regex for finding out whether a given torrent name is a series or a movie. Returns the full name of the series with the separator needed to make it pretty (ie, replace it with space or what you want). Also returns the season number or the year for the movie/series, depending on what was previously matched.

Matches any valid JSON object, matches recursively. Passes all JSON test cases I found.

1-15 alphanumeric login name

Captures all fields from a CSV file's line. Can be customized with user-defined field separator and protecting character.

Validates - URLs with schemes - http, https and ftp Relative URL starting with / and ../

This regex will match any Youtube video ID thrown at it and return one capturing group containing the ID.

Matches single or double quoted strings, and ignores backslash-escaped quotes within the string.

Checks for valid UK/British postcodes. There was another on here that had for some reason been upvoted, but it was actually incorrect as it worked on none of my valid own postcodes! Namely that it assumed two letters and a number (BS3) when you can have variations (M20). Allows for an optional space and separates the two parts into groups.

grabs the ID for the regex101.com permalink to code

Validate cron lines (even the ones commented out)

Validates DateTime of format YYYY-MM-DD hh:mm:ss including Leap Year

Complete url matching with storage of various parameters

From a (fairly large) list of User Agent strings, extract the OS, Browser, and Device Type.

For Validating alphanumeric and numeric range

A string with only numbers in

Valid PHP variable name as defined in the manual at http://php.net/manual/en/language.variables.basics.php

matches: + example: +52 33 3884 7720 +1 770 343 5788

This is simplified from my last submission.

Capture comma separated numbers, no matter if there are spaces before or after the commas.

Match Gmail Email

{1:aa,2:bb,3:"aa:bb"}

Check for true or false street address format

this regex is support for all languages

By Using this string you can just remove ascii special characters from a unicode string characters like ♥♥♥♥ ▓▒ and other non unicode letters.

Matches IP Addresses with minimum false positives

Simple regular expression for extracting attribute value of the element in XML-string. Attribute value should be in quotes.

Validates a RFC3339 DateTime format. Does not validates the Data

This regex is used to remove HTML tag on string

Regex For finding username:password

Use this regex to select all characters up to the "" bracket. It works across multiple lines. You can get an email list with only the IDs. This is the pattern it matches: Alpha Person Step 1 (.*) $ Step 2 [$.$ gives you aperson@whatever.org

Alow alphanumeric characters and spaces

Validates Credit Card Numbers of different type. Supports Visa, MasterCard, American Express, Diners Club, Discover and JCB Taken from http://www.regular-expressions.info/creditcard.html If you want to support only a particular type, customise it based on following. ^(?:40-9]{12}(?:[0-9]{3})? # Visa | 5[1-5{14} # MasterCard | 347{13} # American Express | 3(?:00-5]|[68)[0-9]{11} # Diners Club | 6(?:011|5[0-9]{2})[0-9]{12} # Discover | (?:2131|1800|35\d{3})\d{11} # JCB )$