Populate 2 drops from Multidimentional Array

[system]

Hi,

I know it is possible but I am having difficulties trying to find help online for Multidimensional Arrays populating multiple drop-down menus.

I have 3 dropdown menus. The first has a list of car makes. The other two are for car model and car year. I would like to have the car make populate based on the car make selection and have the car year populate based on the car model selection. I do not want to use a database as the webhost has restirctions.

Here is a short snippet and the array looks something like this:

[php]$arr = array(
array(
“Make” => “Honda”,
“Model” => “Accord III Aerodeck”,
“Year” => 1988),
array(
“Make” => “Honda”,
“Model” => “Accord III Aerodeck”,
“Year” => 1989),
array(
“Make” => “Honda”,
“Model” => “Accord IV Aerodeck”,
“Year” => 1992),
array(
“Make” => “Honda”,
“Model” => “Accord IV Sedan”,
“Year” => 1991),
array(
“Make” => “Honda”,
“Model” => “Accord IX Sedan”,
“Year” => 2016)
);[/php]

Can anyone help with setting up a loop to pull out Model based on Make and Year based on Model.

Thanks for any advice.

[astonecipher]

This gets you what you are after, but there are better and cleaner ways to do so.

[php]$models = [];
foreach ($arr as $r) {
array_push($models, $r[‘Model’]);
}
$filtered_model = array_unique($models);
print_r($filtered_model);[/php]

Where does the array come from? The more correct way, would be to create a car class. Make, Model, and Year would be properties of the class. Then you would create an array of objects (Cars) that you would pull values from.