EDIT BAWAH PROSES

<?php

$id = $_GET['id'];

$qr_trans = mysqli_query($cx,"SELECT * FROM t_sewa WHERE kode_sewa='".$id."'");

while($rc_trans = mysqli_fetch_array($qr_trans)){

$kode_penyewa = $rc_trans['kode_penyewa'];

$tgl_sewa = $rc_trans['tgl_sewa'];

$kode_mobil = $rc_trans['kode_mobil'];

$kode_supir = $rc_trans['kode_supir'];

$lama_sewa = $rc_trans['lama_sewa'];

$potongan = $rc_trans['pot_sewa'];

}

?>

<h3 align="center">Input Transaksi</h3>

<form method="POST" action="proses_edit_trans.php">

<table align="center" width="35%" cellspacing="0" cellpadding="10" border="1">

<tr>

<td>

<p>Kode Sewa<br>

<input value="<?=$id;?>" type="text" name="kode_sewa"></p>

<p>Data Penyewa<br>

<select name="kode_penyewa">

<?php

$qr_penyewa = mysqli_query($cx,"SELECT * FROM m_penyewa");

while($rc_penyewa = mysqli_fetch_array($qr_penyewa)){

if($kode_penyewa == $rc_penyewa['kode_penyewa']){

$slc = 'selected';

}else{

$slc = '';

}

?>

<option <?=$slc;?> value="<?=$rc_penyewa['kode_penyewa']?>">

<?=$rc_penyewa['kode_penyewa']?> | 

<?=$rc_penyewa['nama_penyewa']?>

</option>

<?php

}

?>

</select></p>

<p>Tanggal Sewa<br>

<input value="<?=$tgl_sewa;?>" type="date" name="tanggal"></p>

<p>Data Mobil<br>

<select name="kode_mobil">

<?php

$qr_mobil = mysqli_query($cx,"SELECT * FROM m_mobil");

while($rc_mobil = mysqli_fetch_array($qr_mobil)){

if($kode_mobil == $rc_mobil['kode_mobil']){

$slc_mb = 'selected';

}else{

$slc_mb = '';

}

?>

<option <?=$slc_mb;?> value="<?=$rc_mobil['kode_mobil'];?>">

<?=$rc_mobil['kode_mobil'];?> | 

<?=$rc_mobil['nopol_mobil'];?> | 

<?=$rc_mobil['merk_mobil'];?>

</option>

<?php

}

?>

</select></p>

<p>Kode Supir<br>

<select name="kode_supir">

<?php

$qr_supir = mysqli_query($cx,"SELECT * FROM m_supir");

while($rc_supir = mysqli_fetch_array($qr_supir)){

if($kode_supir == $rc_supir['kode_supir']){

$slc_sp = 'selected';

}else{

$slc_sp = '';

}

?>

<option <?=$slc_sp;?> value="<?=$rc_supir['kode_supir'];?>">

<?=$rc_supir['kode_supir'];?> | 

<?=$rc_supir['nama_supir'];?>

</option>

<?php

}

?>

</select></p>

<p>Lama Sewa<br>

<input value="<?=$lama_sewa;?>" type="number" name="lama_sewa"> Hari</p>

<p>Potongan Harga<br>

<input value="<?=$potongan;?>" type="number" name="potongan"></p>

<center>

<input type="submit" name="submit">

</center>

</td>

</tr>

</table>

</form>