Find an exact phrase (with each space and character in its own place) only if it is within the first 40 characters of the entire sentence. Useful to search non-standard phrases in log files.

Quick Dirty Working

RegEx to validate a NATO Stock Number with or without the NATO Stock Code and with or without dashes

This is validation that is used in html5 for validate the url. http://www.faqs.org/rfcs/rfc3987.html

This looks to attempt to validate email addresses per the RFC. I don't know how accurate it is.

This will match a word that is not wrapper by the a specified HTML element (with a class).

lookahead

Regex pattern for Apache log

this regex is able to validate a date (format dd.mm.yyyy) in every state of user typing. i use it to ensure that the user isn't able to type in an invalid date at all (except from a leap year check which is done afterwards) The regex also makes assumptions of 'missed' separators so 1234 is captured...

Testing (delete)

Replaces preceeding directory with / when ../ is used.

(?=.*[A-Z]) # must contain 1 uppercase letter (?=.*[0-9]) # must contain 1 digit (?!.\n) # must not contain a newline character (?!.*\s) # must not contain any whitespace characters (?=.*[!$#+@%&]) # nust contain one of these symbols .{8,} # match a...

splits into command arguments: spaces split quotes keep spaced texts together \" escapes the quote

matches all positive or negative float or integers

Regex for validating Nigerian phone numbers using all mobile prefixes in the country