Validate Personal Identity Number (HETU).
The Finnish PIN number (HETU) aka Social Security Number (SSN) is a 11 digit number with birthdate as ddmmyycxxxy where c is century, xxx is a three digit individual number and the last digit is a control number (y).
If xxx is odd it's a male PIN number and if even a female.
Return gender (Male or Female) and date of birth (YYYY-MM-DD) in array if PIN is valid, is available by switching $info (2nd parameter) to true.
Example: 010101-123N would be a male and born in 1st of January 1901.
PIN number to be validated
optional; Return gender and date of birth on success
mixed - Returns true or false if $info = false or gender (Male or Female) and date of birth (YYYY-MM-DD) in array if PIN is valid, false otherwise
Example 66-1. Using pin() in default mode
Example 66-2. Using pin() with $info = TRUE