I tried to implement a dependent drop down lists system. The code in contact.php page is:
<?php
$link = new mysqli("localhost", "root", "", "graphicdesign");
if($link->connect_error){
die("ERROR: Nu s-a putut realiza conexiunea la baza de date " .$link->connect_error);
}
$resultSet = $link->query("SELECT * FROM orase") or die('Error In Session');
/* $rowsn = mysqli_fetch_array($resultSet);
$n_oras=$rowsn['denumire_oras'];
$id_orasss=$rowsn['id_oras']; */
//$resultSetRep = $link->query("SELECT id_oras, denumire_rep FROM reprezentante where id_oras='$id_oras'") or die('Error In Session');
//$rows1= mysqli_fetch_array($resultSetRep);
?>
<!DOCTYPE HTML>
<html>
<head>
--head info
</head>
<body>
<form action="#">
<div class="row form-group">
<div class="col-md-12">
<label style="margin-right:15px;">Oras</label>
<select id="denum_oras" name="den_oras">
<?php
while($rows = mysqli_fetch_array($resultSet)) {
$n_oras=$rows['denumire_oras'];
$id_oras=$rows['id_oras'];
echo "<option value='$id_oras'>$n_oras</option>";
}
?>
</select>
</div>
</div>
<div class="row form-group">
<div class="col-md-12">
<label style="margin-right:15px;">Reprezentanta</label>
<select id="reprez" name="reprez">
<?php
while($rows2=$resultSet->fetch_assoc()) {
$id_oras=$rows2['id_oras'];
$den_rep=$rows2['denumire_rep'];
$resultSetRep = $link->query("SELECT id_oras, denumire_rep FROM reprezentante where id_oras='$id_oras'") or die('Error In Session');
while($rows3=$resultSetRep->fetch_assoc()) {
$id_rep = $rows3['id_rep'];
$den_rep = $rows3 ['denumire_rep'];
echo "<option value='$id_rep'>$den_rep</option>";
}
}
?>
</select>
</div>
</div>
</form>
</body>
</html>
The first drop down list is working, it is retrieving the right data from table "orase" in the database:
But for the second drop down, i want that, when i select the option "Braila" form the first drop down, to show the values from the database with the foreign key "id_oras" as the selected choice.
In this case, when I select "Braila" from the first drop down list, with the id_oras=1 in the table orase, I want that the second drop down list to retrieve data from the table "reprezentante" where id_oras = 1, in this case to retrieve values "Rep Braila" and "Rep Braila 2" to be shown in the drop down, but this is not happening..
This is a capture of the page:
The code i posted is the best one i thought about, but still doesn't work.. please help me!
Thanks!
