how to make ascending id in php - php

Question

this code not asceding id. we have id 1, 2, 3, 15. when adding next record is read id 16. so how to solve this problem ? id must 1,2,3,4,5,etc
<?php
include"class_koneksi.php";
$db=new database();
$db->konek();
if(empty($_GET['aksi'])){
$daftar=$db->tampilData();
echo"<table border=1>
<tr>
<td>Id</td>
<td>Nama</td>
<td>Email</td>
<td>Pesan</td>
<td>Edit</td>
<td>Hapus</td>
</tr>";
foreach($daftar as $data){
echo" <tr>
<td>".$data['id']."</td>
<td>".$data['nama']."</td>
<td>".$data['email']."</td>
<td>".$data['pesan']."</td>
<td><a href='?aksi=edit&id=$data[id]'>edit</a></td>
<td><a href='?aksi=hapus_data&id=$data[id]'>Hapus</a></td>
</tr>";
}
echo"</table> <br> <a href='?aksi=tambah'>TAMBAH</a>";
}elseif(isset($_GET['aksi']) && $_GET['aksi']=='tambah'){
echo"<br>
<form method=POST action='?aksi=tambah_data'>
<table>
<tr><td>Nama</td><td><input type=text name='nama'></td></tr>
<tr><td>Email</td><td><input type=text name='email'></td></tr>
<tr><td>Pesan</td><td><input type=text name='pesan'></td></tr>
<tr><td></td><td><input type=submit value='simpan'></td></tr>
</table>
</form>
";
}elseif(isset($_GET['aksi']) && $_GET['aksi']=='tambah_data'){
$id= isset($_POST['id']);
$nama=$_POST['nama'];
$email=$_POST['email'];
$pesan=$_POST['pesan'];
$db->tambahData($id,$nama,$email,$pesan);
}elseif(isset($_GET['aksi']) && $_GET['aksi']=='edit'){
$id=$_GET['id'];
echo"<br>
<form method=POST action='?aksi=update_data'>
<table>
<tr><td>Id</td><td><input type=text name='id' value='".$db->bacaData('id',$id)."'></td></tr>
<tr><td>Nama</td><td><input type=text name='nama' value='".$db->bacaData('nama',$id)."'></td></tr>
<tr><td>Email</td><td><input type=text name='email' value='".$db->bacaData('email',$id)."'></td></tr>
<tr><td>Pesan</td><td><input type=text name='pesan' value='".$db->bacaData('pesan',$id)."'></td></tr>
<tr><td></td><td><input type=submit value='simpan'></td></tr>
</table>
<input type='hidden' name='id' value='".$db->bacaData('id',$id)."'>
</form>
";
}elseif(isset($_GET['aksi']) && $_GET['aksi']=='update_data'){
$id=$_POST['id'];
$nama=$_POST['nama'];
$email=$_POST['email'];
$pesan=$_POST['pesan'];
$db->updateData($id,$nama,$email,$pesan);
}elseif(isset($_GET['aksi']) && $_GET['aksi']=='hapus_data'){
$id=$_GET['id'];
$db->hapusData($id);
}
?>
can you tell me where this code wrong?
can you help me solve this problem? thanks

Answer 1

Remove the auto increment property of the table which is showing 16.
Before inserting a new row in that table write a select query.
$sql = "select * from `table_name`";
$result = mysql_query($sql);
$id=count($result)+1;
if(count($result)>0){
$temp = 1;
while($row = mysql_fetch_assoc($result)){
if($row['id']!=$temp++){
$id=$temp; break;
}
}
}
$sql = "insert into `table_name` (`id`,`..`,`..`) values('"$id.."','..','..')";
mysql_query($sql);
I hope this will solve your query...

Answer 2

It is showing id as 16 becouse in table properties Id is set as auto increment

Answer 3

First remove auto increment from id in the respective database table you are having this issue. Then Replace this code section with your code.
.
.
.
elseif(isset($_GET['aksi']) && $_GET['aksi']=='tambah'){
$daftar=$db->tampilData();
$id=count($daftar)+1;
if(count($daftar)>0){
$temp = 1;
forech($daftar as $row){
if($row['id']!=$temp++){
$id=$temp; break;
}
}
}
echo"<br>
<form method=POST action='?aksi=tambah_data'>
<table>
<tr><td>Nama</td><td><input type=text name='nama'><input type="hidden" name='id' value="<?php echo $id ?>"></td></tr>
<tr><td>Email</td><td><input type=text name='email'></td></tr>
<tr><td>Pesan</td><td><input type=text name='pesan'></td></tr>
<tr><td></td><td><input type=submit value='simpan'></td></tr>
</table>
</form>
";
}elseif(isset($_GET['aksi']) && $_GET['aksi']=='tambah_data'){
$id= $_POST['id'];
$nama=$_POST['nama'];
$email=$_POST['email'];
$pesan=$_POST['pesan'];
$db->tambahData($id,$nama,$email,$pesan);
}
.
.
.
I hope this solves your requirement..