Question

PDO之SQL语句预处理错误，是PHP版本问题吗

Answer 1

<?<a href="https://www.baidu.com/s?wd=php&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLujuhPvnznWb4rjubuhm10ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6K1TL0qnfK1TL0z5HD0IgF_5y9YIZ0lQzqlpA-bmyt8mh7GuZR8mvqVQL7dugPYpyq8Q1b1rjnsPHmknjb4njcknHm4n6" target="_blank" class="baidu-highlight">php</a>
$dsn = "localhost";
$dbname = "superelesystem";
$user = "root";
$password = "admin";
try {
$db = new <a href="https://www.baidu.com/s?wd=PDO&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLujuhPvnznWb4rjubuhm10ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6K1TL0qnfK1TL0z5HD0IgF_5y9YIZ0lQzqlpA-bmyt8mh7GuZR8mvqVQL7dugPYpyq8Q1b1rjnsPHmknjb4njcknHm4n6" target="_blank" class="baidu-highlight">PDO</a>('mysql:host='.$dsn.';dbname='.$dbname, $user, $password);
//echo "数据库连接成功";
} catch (<a href="https://www.baidu.com/s?wd=PDO&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLujuhPvnznWb4rjubuhm10ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6K1TL0qnfK1TL0z5HD0IgF_5y9YIZ0lQzqlpA-bmyt8mh7GuZR8mvqVQL7dugPYpyq8Q1b1rjnsPHmknjb4njcknHm4n6" target="_blank" class="baidu-highlight">PDO</a>Exception $e) {
print "数据库连接失败，提示错误内容: " . $e->getMessage() . "";
exit;
//<a href="https://www.baidu.com/s?wd=die&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLujuhPvnznWb4rjubuhm10ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6K1TL0qnfK1TL0z5HD0IgF_5y9YIZ0lQzqlpA-bmyt8mh7GuZR8mvqVQL7dugPYpyq8Q1b1rjnsPHmknjb4njcknHm4n6" target="_blank" class="baidu-highlight">die</a>();
}