Cant input data to database with PDO - php

Question

im trying to input data to database with PDO,i make a form for users to input,so forminput -> inputprocess.
But i cant input coz when i press submit its going to proses_input.php and show blank page.
I try to write the code in 1 file but when i press submit it show the input form again.
Here is my form_input.php
<form method="POST" action="proses_input.php">
<table>
<tr>
<td>Nama</td>
<td> : </td>
<td>
<input type="text" name="nama" required>
</td>
</tr>
<tr>
<td>No. Pegawai</td>
<td> : </td>
<td>
<input type="text" name="no_pegawai" required>
</td>
</tr>
<tr>
<td>Bagian</td>
<td> : </td>
<td>
<input type="text" name="bagian">
</td>
</tr>
<tr>
<td>Jabatan</td>
<td> : </td>
<td>
<input type="text" name="jabatan">
</td>
</tr>
<tr>
<td></td>
<td></td>
<td>
<button type="submit" value="submit">Input</button>
</td>
</tr>
</table>
</form>
and here is my proses_input.php
<?php
include_once "connect.php";
if (isset($_POST["submit"])) {
$no_pegawai = $_POST['no_pegawai'];
$nama = $_POST['nama'];
$bagian = $_POST['bagian'];
$jabatan = $_POST['jabatan'];
try { //KONDISI
$sql = "INSERT INTO phonebook (no_pegawai, nama, bagian, jabatan)
VALUES (:no_pegawai, :nama, :bagian, :jabatan)";
$input = $conn->prepare($sql);
$input->bindparam(':no_pegawai', $no_pegawai);
$input->bindparam(':nama', $nama);
$input->bindparam(':bagian', $bagian);
$input->bindparam(':jabatan', $jabatan);
$input->execute();
header('location: admin.php');
} catch (PDOException $e) {
echo $e->getMessage();
}
}
?>
IDK why but everytime i input data to my form,its always stuck on proses_input.php with blank page.i already try to put it in one php file but still not works. Pls help me,thanks

Answer 1

As mentioned above you haven't named your button, therefore it won't match the condition isset($_POST["submit"]) because there is no field named "submit" in your $_POST array. Also worth noting that you should not rely on users input. I saw that you are using parameterized query which is nice but don't forget to escape these values when displaying them on the UI to avoid XSS vulnerabilities.