Validation Expression to validate Blank String checks

Check if there's at least a lowercase, uppercase, digit and punctuation mark.

Regex to validate a Access-Control-Allow-Origin value

Phone Number with no letters or spaces

This regex gets the first, the last and the middle part as capturing groups and matches the trailing semicolon as a non-capturing group. This allows you to resort CSV columns.

finds definitions of gas vars in map edits (SS13 /tg/station)

check referrer when redirecting

This expression was created to nullify the HTML Tag Attributes

Div Matching Test

Tests if a string can be parsed as a number which may contain a fractional component. May be negative. Plus sign and scientific notation are not supported. Valid: '1234', '-1234', '-1.234', '1234.1234' Not valid: '1.1.1', '+1', '.1', '-.1', '10.1234E10', '1.'