Question

I’m trying to select all values from my MySQL database. Options a, b, and c work fine but I’m not sure of the syntax to select all three.

<option value="1">a</option>
<option value="2">b</option>
<option value="3">c</option>
<option value="1,2,3">All</option>

Answer 1

I think you want to use the select to fetch a item or all items if I understand your question correctly and by seeing your ‘all’ option’s value.

If so then change your select option’s value for all to <option value="all">all items</option>.

Then change your PHP file (where you posting to with the form) to this:

// is the all option send?
if($_POST['your_select'] === 'all') {
    //query to get all the items (SELECT * FROM table)
} else {
    // query with the post value as the id (SELECT * FROM table WHERE id = $_POST['your_select'])
}