this example code for get last id in db

last_id_db.php

<?php
    $host = "127.0.0.1:3306";
    $user = "root";
    $pass = "";
    $db     = "malikdata";

$line = new mysqli($host,$user,$pass,$db);

if($line->connect_error){
    echo "<br>connection error".$line->connect_error;
}else{
    echo "connection succsesfuly<br>";
}

$sql = "INSERT INTO halaman(judul,content)VALUES('halaman tiga','ini content halaman dua agak panjang tapi tidak mengapa lah bisa dibaca yang penting soalnya masih baru nyoba gitu')";

if($line->query($sql) === TRUE){
    $last_id = $line->insert_id;
    echo "berhasil memasukkan data<br>".$last_id;
    
}else{
    echo "error".$sql."koneksi".$line->error;
}
$line->close();
?>