Please note, the first time into this form, the CAR and MODEL are corrfect. The user is free to select a different MODEL, but if the user selects a different CAR, then the MODEL isn't correct until after the user submits the form.
<?php
if (!session_id())
{
session_start();
}
// init SESSIONs
$_SESSION['car'] = isset($_SESSION['car']) ? $_SESSION['car'] : 0;
$_SESSION['model'] = isset($_SESSION['model']) ? $_SESSION['model'] : 0;
// follow GET
$car = isset($_POST['car']) ? $_POST['car'] : $_SESSION['car'];
$model = isset($_POST['model']) ? $_POST['model'] : $_SESSION['model'];
// init arrays
$cars = array("Chev", "Dodge", "Ford");
$models = array(
array("Camaro", "Equinox", "Tahoe"),
array("Challenger", "Charger", "Durango"),
array("Explorer", "Mustange", "Puma")
);
// if car has changed then model must be 0 (first index in models array)
if ($_SESSION['car'] != $car)
{
$model = 0;
}
// populate SESSIONs
$_SESSION['car'] = $car;
$_SESSION['model'] = $model;
include('../includes/header4.php');
?>
<h1>Drop Down (w/o ajax) </h1>
<p>
Please note, the first time into this form, the CAR and MODEL are corrfect. The user is free to select a different MODEL,
but if the user selects a different CAR, then the MODEL isn't correct until after the user submits the form.
</p>
<form action="" method="POST">
<table class="full">
<tr>
<th>
CAR
</th>
<th>
MODEL
</th>
</tr>
<tr>
<td class="center">
<select name="car">
<?php
foreach ($cars as $key => $value)
{
if ($key == $car)
{
echo("<option value=$key selected >$value");
$carName = $value;
}
else
{
echo("<option value=$key >$value");
}
}
?>
</select>
</td>
<td class="center">
<select name="model">
<?php
foreach ($models as $temp => $mData)
{
if ($car == $temp)
{
foreach ($mData as $key => $value)
{
if ($key == $model)
{
echo("<option value=$key selected >$value");
$modelName = $value;
}
else
{
echo("<option value=$key >$value");
}
}
}
}
?>
</select>
</td>
</tr>
</table>
<input type="hidden" name="step" value="1">
<input type="submit" name="submit" value="Submit">
</form>
<?php
include('../includes/footer4.php');
?>
Last modified: April 07 2022
Line Count: 115