如何从php中的HTML select元素中获取所有值？

Question

I have a HTML form with two select elements(listboxes) and two buttons to move the data from one listbox to another(using JavaScript):

 <form action="page.php" method="post">
        <select name="select1" multiple="yes">
            <option value="1">Left1</option>
            <option value="2">Left2</option>
            <option value="3">Left3</option>
        </select>
        <input type="button" value="--&gt;" onclick="moveOptions(this.form.select1, this.form.select2);" /><br />
        <input type="button" value="&lt;--" onclick="moveOptions(this.form.select2, this.form.select1);" />
        <select name="select2" multiple="yes">
            <option value="4">Right1</option>
            <option value="5">Right2</option>
        </select>
        <input type="submit" name="submit" value="Submit">
</form>

When I hit the Submit button I want to get all the values stored in the listboxes.

foreach ($_POST['select1'] as $value)
    {
        //save data to database
    }

This just gets one selected value(if there was one).

I managed to get multiple values (if they are selected) by putting a [] after the name of the select.

<select name="select1[]" multiple="yes">

But this still doesn't gets the unselected values, and this way the data moving JavaScript function doesn't works either.

Answer 1

var select1 = document.getElementById('select1');
var values = new Array();

for(var i=0; i < select1.options.length; i++){
    values.push(select1.options[i].value);
}

To pass the array from page to page, go here