Fatal error: Uncaught PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '0' for key 'PRIMARY' in /home/hipolitek/public_html/test1234/register.php:11 Stack trace: #0 /home/hipolitek/public_html/test1234/register.php(11): PDO->query('INSERT INTO use...') #1 {main} thrown in /home/hipolitek/public_html/test1234/register.php on line 11