syntax error, access violation pdo - php

Question

i am getting this error:
SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INSERT INTO student_details (student_id, first_name, last_name, dob, address_lin' at line 2
for this code: any idea?
//create variables from each value that was submitted from the form */
$student_info_id = $_POST['student_info_id'];
$class_id = $_POST['class_id'];
$first_name = $_POST['first_name'];
$last_name = $_POST['last_name'];
$dob = $_POST['dob'];
$address_line_1 = $_POST['address_line_1'];
$address_line_2 = $_POST['address_line_2'];
$town = $_POST['town'];
$county = $_POST['county'];
$postcode = $_POST['postcode'];
$gender = $_POST['gender'];
$ethnicity = $_POST['ethnicity'];
try {
$conn = new PDO("mysql:host=$host; dbname=$dbname", $user, $password);
$conn->exec("SET CHARACTER SET utf8"); // Sets encoding UTF-8
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sql = "
INSERT INTO student_info (student_info_id, class_id) VALUES (:student_info_id, :class_id)
INSERT INTO student_details (student_id, first_name, last_name, dob, address_line_1, address_line_2, town, county, postcode, gender, ethnicity, student_info_id)
VALUES (:student_id, :first_name, :last_name, :dob, :address_line_1, :address_line_2, :town, :county, :postcode, :gender, :ethnicity, :student_info_id)
";
$statement = $conn->prepare($sql);
$statement->bindValue(":student_info_id", $student_info_id);
$statement->bindValue(":class_id", $class_id);
$statement->bindValue(":student_id", $student_id);
$statement->bindValue(":first_name", $first_name);
$statement->bindValue(":last_name", $last_name);
$statement->bindValue(":dob", $dob);
$statement->bindValue(":address_line_1", $address_line_2);
$statement->bindValue(":address_line_2", $address_line_1);
$statement->bindValue(":town", $town);
$statement->bindValue(":county", $county);
$statement->bindValue(":postcode", $postcode);
$statement->bindValue(":gender", $gender);
$statement->bindValue(":ethnicity", $ethnicity);
$statement->bindValue(":student_info_id", $student_info_id);
$count = $statement->execute();
$conn = null; // Disconnect
}
catch(PDOException $e) {
echo $e->getMessage();
}

Answer 1

I'm not sure if PDO support multiple statements, but if so, the error is that you did not terminate the first statement,
INSERT INTO student_info (student_info_id, class_id)
VALUES (:student_info_id, :class_id);
^ add this one

Answer 2

You'll have to finish the first INSERT with a ; Like this:
INSERT INTO student_info (
student_info_id,
class_id
) VALUES (
:student_info_id,
:class_id
); <-- a semicolon is the default statement separator, use it
....
Note that, although it is possible to run multiple queries at once, I would not advice you to do it. If you would run each query one by one you would have a better control over errors.

Answer 3

You can't run multiple queries in one call.
Run them separately, one by one.