multiple criteria selection

In my table of contacts, all contacts have a category (=numeric value). Now I want to be able to select contacts in one or more categories (for instance "Family"+ "Team mates" + "Colleagues", "Team mates" + "Colleagues" or "Family" only).

For this, I made in Dreamweaver a selection page with a select list.
In this list, the names of my categories appear, and the corresponding value is selected when the category is selected.

The resulting value of the select list is send with $_POST['result'] to the next page. So far, no problem. I need some help however in using $_POST['result'] in my MySQL statement.

I tried ...WHERE r_categorie in ($_POST['result']).... This works fine when only one contact category is selected.
When more categories are selected, this WHERE clause gives only the last one that was selected in the select list.

What should I change? Is the select list the most appropriate way of making the selection (knowing that the category list is dynamic)?

Any help will be greatly appreciated.

Kind regards,

Erik

To have a multiple select list pass all values that where selected in PHP, you must name the select list with "[]" at the end of the name to create an array. For example:
<select name="result[]" size="4" multiple id="result[]">


To get the values out of the array, you need to use the php implode function:
<?php echo(implode(", ", $_POST['result'])); ?>


your recordset SQL would need to be:

WHERE r_categorie in(".implode(",", $_POST['result']).")

Jason, thanks a lot. This did the trick and it works fine now.

Kind regards,

Erik