[RESOLVED] PHP/HTML Pull down box

pls, can somebody show me how to read in the values of a multi-select pull down menu.

if a user should select multiple values from a pull down box, how do i read it in?

You need to append [] to the name of the list box. PHP will then load all the select values into an array on the server:

HTML Code:

---

<input type="hidden" name="multi" value="" />
<select name="mutli[]" multiple="multiple" size="10">
    <option value="1">Option 1</option>
    <option value="2">Option 2</option>
    <option value="3">Option 3</option>
    <option value="4">Option 4</option>
    <option value="5">Option 5</option>
    <option value="6">Option 6</option>
    <option value="7">Option 7</option>
    <option value="8">Option 8</option>
    <option value="9">Option 9</option>
    <option value="10">Option 10</option>
</select>

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The hidden field is optional. It just ensures the presence of a multi varaible in the $_POST array, even if nothing was selected.

To find out what was selected, if any, do the following:

PHP Code:

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if (isset($_POST['multi']) && is_array($_POST['multi'])) {
    foreach($_POST['multi'] as $item) {
        /* do stuff here */
    }
} 


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thanks...help appreciated

i got that working fine...but i now have a problem in using the checkbox/listbox with javascript
e.x.this results in an error

Code:

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<script>
document.all.multi[].value;
</script>

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how can i overcome this?

Give the form an ID and you can access it as follows:

Code:

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var theForm = document.getElementById('theForm');

Var value = theForm.elements['multi[]'].value;

---

Suare brackets are Jvascript meta characters, you therefore need to access the element via the elements array of the form object.

thanks but i found another error when i do this

Code:

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theForm.elements[''multi[]'].selectedIndex;

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the error say it is null or not an object.

Did you give the form an ID?

ie:

Code:

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<form id="theForm">

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yes i did

got it... the problem is that the javascript in in an external .js, which means saying something like

Code:

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document.frmForm.elements['multi[]'];

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will pop up an error(i guess)
but thanks its now working fine