Interchange Reference Pages: Checks

Table of Contents

always_fail — always fail

always_pass — always pass

email_only — e-mail address is syntactically correct

exists — record exists in a database table

filter — value passes through specified filter unmodified

future — date is a future date

isbn — string is a valid ISBN-10/ISBN-13 code

length — string is within specified length limits

match — CGI value matches another CGI value

natural — number is a natural number

regex — value matches regular expression

relative_filename — value qualifies as relative filename

unique — record doesn't exist in a database table