$re = '/^[A-Za-z]{6}\d{2}[A-Za-z]\d{2}[A-Za-z]\d{3}[A-Za-z]$/m';
$str = 'FTNPZT92A15E738I
YDGGMN73M03L018A
CDSZXW93A26L613M
SKRZKW36B29Z730F
SKRZKW36B29Z7304
SKRZKW36B29Z73EF
SKRzkW36B29Z730f';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php