Unraveling the mysteries of this PHP-generated object

Need help with iterating over a JSON object generated by PHP code in response to a web service request. Looking for guidance on rendering sub-objects in a select list, especially those with value indexes.

Can someone provide assistance on populating a select list using a JavaScript object structured like this?

This object contains multiple sub-objects each with label and value pairs.

data = object(
    0 => object(
        'label' = > 'test1',
        'value' = > 1
    ),
    1 => object(
        'label' = > 'test1',
        'value' = >
        0 = > object(
            'label' = > 'sub testing1',
            'value' = > 1
        ),
        1 = > object(
            'label' = > 'sub testing2',
            'value' = > 1
        ),
    ),
    3 = > object(
        'label' = > 'test3',
        'value' = >
        0 = > object(
            'label' = > 'sub testing - test 3',
            'value' = > 33
        ),
    )
)

Answer №1

To convert PHP data into JSON format and create a drop down menu, you can utilize the resulting object as a hash in PrototypeJS. This can be achieved by using the following code:

$H(obj);

You can easily iterate through the key-value pairs of the hash like this:

var selectOpts = new String();
$H(obj).each(function(pair){
    selectOpts += "<option value=\"" + pair.key + "\">" + pair.value + "</option>";
});

If the key represents the actual value and the value is the "label", use dot notation to access them accordingly with your dataset.

In case you are working with Script.aculo.us, consider creating HTML options using the Builder module:

selectOpt = Builder.node("option", { [attribs] });

Remember to array push the "built" option nodes and append them inside a select element.

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