How to print Option List from HTML in php?

**canadatom** · 04-28-2009 12:48 PM

Hi I am new to php, I am working on my PHP assignment.
Here is how it works,

I have a html page contains 2 selection box, first one with course list, there are 2 buttons, add and remove, if I click add, the course name will be added to the second box, it has been done by JavaScript. Now I will write another php page to process the information in the second box containing added course information. I tried to use the following code in php page to bring up what's options in the second box, but the result comes out only with selected options:

submit.php to process main.php added options in second box

PHP Code:


<?php
    $rightOptions = $_GET['right'];
    for($i=0; $i < count($leftOptions); $i++)
       {
           echo($leftOptions[$i] . " ");
       }
?>

main.php contains 2 select boxes and 3 buttons

PHP Code:



<?php
    session_start();
?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link href="style.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src = "code.js"></script>
<title>Main Page</title>
</head>

<body>
<div id="wrapper">
        <div>
        <?php
            // show user id on top
            echo "User ID: ".$_SESSION['user_id'];
        ?>
        </div>
        
        <div id="container1">
            <div id="topHeader"><h1>Course Selection</h1></div>
              <div id="topContent">
           
                       
                       <form action="submit.php" method="get">
                        <div id="leftcol">
                            <select name="left" size="15" multiple="multiple">
                                <option value="0">Select cources(s)</option>
                                <option value="1">ITEC1000</option>
                                <option value="2">ITEC1010</option>
                                <option value="3">ITEC1620</option>
                                <option value="4">ITEC1630</option>
                                <option value="5">ITEC2010</option>
                                <option value="6">ITEC2620</option>
                                <option value="7">ITEC3020</option>
                                <option value="8">ITEC3210</option>
                                <option value="9">ITEC3230</option>
                                <option value="10">ITEC4010</option>
                                <option value="11">ITEC4020</option>
                                <option value="12">ITEC4030</option>
                                <option value="13">ITEC4040</option>
                                <option value="14">ITEC4220</option>
                                <option value="15">ITEC4305</option>
                            </select> 
                          </div>
                          
                        <div id="middlecol">
                            <input class="btn" name="add" type="button" value="Add &gt;&gt;"  onclick="move(left,right,'add')"/><br/>
                            <input class="btn" name="remove" type="button" value="&lt;&lt; Remove" onclick="move(right,left,'remove')"/><br/>
                            <input type="submit" name="next" value="Next>>"/>
                        </div>
                        
                        <div id="rightcol">
                            <select name="right" size="15">
                                <option value="-1"></option>
                            </select>
                        </div>
                        </form>
            </div>
        </div>
    
        <div id="clear"></div>
        <div>
        
        
        <div id="clear"></div>
        
        <div id="container2">
            <div id="bottomHeader"><h1>Selected Courses - Detailed Information</h1></div>
            <div id="botContent"></div>
            
        </div>
    </div>
</body>
</html>

**Greyfish** · 04-28-2009 04:54 PM

What does the URL look like once the form has been submitted?

**canadatom** · 04-28-2009 06:03 PM

localhost/a/main.php
to
localhost/a/submit.php

**canadatom** · 04-29-2009 04:11 PM

let's make it simple, how to pass all option values into PHP?(including unselected options as well)

**canadatom** · 04-29-2009 04:50 PM

there is a way to do it, I am not sure it's appropriate way to do though, first I will use JavaScript to load the select option form and iterate all options and save all options into session, then I will pull the session out in next PHP page. is this right way to use PHP?

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