This is a relaxed cron validation, meaning that any valid cron expression should pass this; but not anything that passes regex validation is a good cron expression. Used as preliminary validation in web ui. Supports all special characters. Includes seconds field.

Validates input to match UK Date Time standard

Visa, MasterCard, American Express, Diners Club, Discover, JCB

allows for all legal IPv4 addresses

Pattern that matches all expression that not include a subexpression. The subexpression could be replaced by a string.

should start with letter follow by letters and numbers and (-) - zero or more can't start or finish with (-) can't have two or more consecutive (-) char

Get key value in json string

checklists item

ValidatesMathematical Expressions. Ignores whitespace. Includes parenthesis matching.