<?php
$host_database = 'mysql:dbname=tabla_db;host=localhost';
$username = "root";
$password = "";

try{ $pdo = new PDO($host_database,$username,$password); }
catch(PDOException $e){ echo 'Error: ' . $e->getMessage(); }

if ($_SERVER['REQUEST_METHOD'] == 'POST'){

$student_name = $_POST['student_name'];

$statment = $pdo->prepare( 'INSERT INTO students (student_id,student_name) VALUES (null, :student_name)' );
$statment->execute(array( ':student_name' => $student_name, )); }

?>

<form enctype="multipart/form-data" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>" method="post">

<input type="text" class="form-control" name="student_name" placeholder="Name Student">

<select multiple class="form-control" name="course_id[]">

<option value="1">Photoshop</option>
<option value="2">Illustator</option>
<option value="3">Cinema 4D</option>
<option value="4">Indesign</option>
<option value="5">3D Max</option>

</select>

<button type="submit">Submit</button>
</form>

<?php
$host_database = 'mysql:dbname=tabla_db;host=localhost';
$username = "root";
$password = "";

try{ $pdo = new PDO($host_database,$username,$password); }
catch(PDOException $e){ echo 'Error: ' . $e->getMessage(); }

if ($_SERVER['REQUEST_METHOD'] == 'POST'){

$student_name = $_POST['student_name'];

$statment = $pdo->prepare( 'INSERT INTO students (student_id,student_name) VALUES (null, :student_name)' );
$statment->execute(array( ':student_name' => $student_name, )); }

?>

<form enctype="multipart/form-data" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>" method="post">

<input type="text" class="form-control" name="student_name" placeholder="Name Student">

<select multiple class="form-control" name="course_id[]">

<option value="1">Photoshop</option>
<option value="2">Illustator</option>
<option value="3">Cinema 4D</option>
<option value="4">Indesign</option>
<option value="5">3D Max</option>

</select>

<button type="submit">Submit</button>
</form>

<?php
$host_database = 'mysql:dbname=tabla_db;host=localhost';
$username = "root";
$password = "";

try{ $pdo = new PDO($host_database,$username,$password); }
catch(PDOException $e){ echo 'Error: ' . $e->getMessage(); }

if ($_SERVER['REQUEST_METHOD'] == 'POST'){

$student_name = $_POST['student_name'];

$statment = $pdo->prepare( 'INSERT INTO students (student_id,student_name) VALUES (null, :student_name)' );
$statment->execute(array( ':student_name' => $student_name, )); }

?>

<form enctype="multipart/form-data" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>" method="post">

<input type="text" class="form-control" name="student_name" placeholder="Name Student">

<select multiple class="form-control" name="course_id[]">

<option value="1">Photoshop</option>
<option value="2">Illustator</option>
<option value="3">Cinema 4D</option>
<option value="4">Indesign</option>
<option value="5">3D Max</option>

</select>

<button type="submit">Submit</button>
</form>