Question

I’m using $intVariable=(int)$_GET[var1];

to output and select a variable in mysql records i.e /myfile.php?cat=5 selects different results.

I am dealing with a dropdown from SQL so need to output a list based on selected ID’s.. so I need to have something like /myfile.php?var1=X&var2=Y

I’m actually using a bit of JavaScript too, so unsure whether it’s PHP or JS I need to adjust to grab another variable.

This code + some PHP currently outputs the selected ID of my selection in the title bar..

    function reload(form)
    {
    var val=form.cat.options[form.cat.options.selectedIndex].value;
    self.location='myfile.php?var1=' + val ;
    }

How do I achieve this multi tier structure getting 2 variables from the title, so I can use multiple variable to assign in my MYSQL selects. have tier dropdown lists

Answer 1

Not really sure what exact answer your looking for, but to fix your function to add more vars:

function reload(form)
    {
    var val=form.cat.options[form.cat.options.selectedIndex].value;
    self.location='myfile.php?var1=' + val + '&var2=' + val2;
    }

In general:

what your setting there is the GET parameters in the URL, so for example to set the variables “name” and “age” you would do:

http://www.example.com?name=bob&age=17

Where name is bob and age is 17

The other way people do it is through html arrays, so:

http://www.example.com?people[]=bob&people[]=fred

On the php side, $_GET[‘people’] will return an array with the two strings bob and fred.

If your using javascript to construct the url, you need to js to create a url like the one above, I’m guessing it should return

self.location='myfile.php?var1='+val+'&var2='+val2

When your reloading the form, to retain the selected drop down, you need to do one of two things

JS: Recommended

$('#mySelect').val(val2)

or in the php

if($optionvalue == $val2){$selected = "selected"}
echo "<option value=\"$optionvalue\" $selected>myoption</option>"