Validation function written in PHP. Validates against the ISO 3779 standard.
See: http://en.wikipedia.org/wiki/Vehicle_identification_number
Example:
if (is_vin('1M8GDM9AXKP042788')) {
echo 'valid';
} else {
echo 'not valid';
}
This function will work for any US/Canadian automobile made after January 1st, 1980.
Tested with PHP 5.2.x however it should work with older versions.