SQLSTATE[HY093] : pdo statement during insert into mysql db

Question

Here it is my php code to realize insert into db:

Answer 1

Not sure if this is the cause of your error, but in your insert statement, CASE is a MySQL reserved word and should be escaped with backticks.

$STH = $DBH->prepare("INSERT INTO users (name, 
                                        surname, 
                                        address, 
                                        birth_place,
                                        province,
                                        dt,
                                        sex,
                                        `case`) value (:name
                                                    :surname,
                                                    :address,
                                                    :birth_place,
                                                    :province,
                                                    :dt,
                                                    :sex,
                                                    :case)");

Answer 2

In your query you use :dt as a placeholder, but in the class constructor you use $this->birth_date.

Once casted, this will create an array with index 'birth_date', which doesn't match with the named parameter "dt": choose one or the other.