How to retrieve value from a select box? [duplicate] - php

Question

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
PHP: “Notice: Undefined variable” and “Notice: Undefined index”
In html code:
<select name="123023d">
<option value="default">Not Share</option>
<option value="read">Read Only</option>
<option value="edit">Editable</option>
</select>
In php code:
$rights=$_POST['123023d'];
Why i can not retrieve the value of this select box?
Notice: Undefined index: 123023d in C:\xampp\htdocs\fyp\list\add.php on line 87
Thank you.
I am sure it is in the form and it is a post method. It is located after foreach ($result as $set) as you can see i draw some sql value to generate that select box and the name of the select box is userID
Whole part:
<form id="addlist" method="post" action="add.php" >
<h1>Create your new subscriber list</h1>
<p>Create a new list before adding subscriber <label class="right"><em class="dot">*</em> indicates required</label></p>
<label><em class="dot">*</em> List name:
<span class="small">Add your list name</span>
</label>
<input id="lname" name="lname" class="required" />
<div class="spacer"></div>
<label>Reminder:
<span class="small">Remind the details of your list</span>
</label>
<textarea id="creminder" name="creminder" cols="52" ></textarea>
<div class="spacer"></div>
<div class="spacer"></div>
<p>Email me when ...</p>
<label>People subscribe:</label> <input type="checkbox" class="checkbox" name="subscribe" value="1">
<label>People unsubscribe:</label> <input type="checkbox" class="checkbox" name="unsubscribe" value="1">
<div class="spacer"></div>
</div>
</br>
<div id="stylized" class="myform">
<p>Permission Setting ...</p>
<label>Open to other users:</label> <input type="checkbox" class="checkbox" name="public" value="1">
Or
<div class="spacer"></div>
Select the permission for individual user:
<?
$sql =
"SELECT UserID,Name,Rights,Position
FROM user
WHERE UserID != ?
AND Rights != 'Admin'
";
$stmt = $conn->prepare($sql);
$stmt->execute(array($_SESSION['username']));
$num_rows= $stmt->rowCount();
if ($num_rows != 0){
$result = $stmt->fetchAll();
?>
<table width="100%" class="display" id="viewSub">
<thead>
<tr>
<th field="col1" width="40%">Name:</th>
<th field="col2" width="40%">Position:</th>
<th field="col2" width="20%">Permission:</th>
</tr>
</thead>
<tbody>
<?
foreach ($result as $set)
{
echo "<tr><td>".$set['Name']."</td><td>".$set['Position']."</td><td><select name=".$set['UserID']."><option value='default'>Not Share</option><option value='read'>Read Only</option><option value='edit'>Editable</option></select></td></tr>";
}
?>
</tbody>
</table>
<?
}
else
echo "There is no another user in this system";
?>
<input class="submit" type="submit" name="submit" value="Submit"/>
<div class="spacer"></div>
</form>
add.php which is the form and the result process
<?
include("../connection/conn.php");
session_start();
if($_SERVER['REQUEST_METHOD'] == "POST"){
print_r($_POST);
exit();
if (!isset($_POST['subscribe']))
$_POST['subscribe']=0;
if (!isset($_POST['unsubscribe']))
$_POST['unsubscribe']=0;
if (!isset($_POST['public']))
$_POST['public']=0;
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
try {
$listName = $_POST['lname'];
$listRemindSub = $_POST['subscribe'];
$creator = $_SESSION['username'];
$listRemindUnSub = $_POST['unsubscribe'];
$isPublic = $_POST['public'];
$listReminder = $_POST['creminder'];
$query="INSERT INTO list (ListID,ListName,Creator,IsRemindSub,IsRemindUnSub,IsPublic,CreateDate,Reminder) VALUES ('',?,?,?,?,?,CURDATE(),?)";
$stmt = $conn->prepare($query);
$stmt->bindParam(1, $listName , PDO::PARAM_STR);
$stmt->bindParam(2, $creator, PDO::PARAM_STR);
$stmt->bindParam(3, $listRemindSub, PDO::PARAM_INT);
$stmt->bindParam(4, $listRemindUnSub, PDO::PARAM_INT);
$stmt->bindParam(5, $isPublic, PDO::PARAM_INT);
$stmt->bindParam(6, $listReminder, PDO::PARAM_STR);
$stmt->execute();
}
catch(PDOException $e)
{
die ($e->getMessage().' Back');
$conn->rollBack();
}
try {
$lastID=$conn->lastInsertId();
$query="INSERT INTO require_attributes (ReqID,ListID,Attribute,Tag) VALUES ('',$lastID,'Email','{email}')";
$stmt = $conn->prepare($query);
$stmt->execute();
$query="INSERT INTO require_attributes (ReqID,ListID,Attribute,Tag) VALUES ('',$lastID,'FirstName','{fname}')";
$stmt = $conn->prepare($query);
$stmt->execute();
$query="INSERT INTO require_attributes (ReqID,ListID,Attribute,Tag) VALUES ('',$lastID,'LastName','{lname}')";
$stmt = $conn->prepare($query);
$stmt->execute();
}
catch(PDOException $e)
{
die ($e->getMessage().' Back');
$conn->rollBack();
}
try{
$sql = '
SELECT UserID
FROM user
WHERE Rights != ?';
$stmt = $conn->prepare($sql);
$stmt->execute(array('admin'));
$result= $stmt->fetchAll();
}
catch(PDOException $e)
{
die ($e->getMessage().' Back');
}
foreach ($result as $set)
{
if ($set['UserID']==$_SESSION['username'])
$rights='edit';
else
{$rights=$_POST[$set["UserID"]];
$rights=$_POST['123023d'];}
if ($rights != 'default' || $set['UserID']==$_SESSION['username'] || $_POST['public']==0)
{
$user=$set['UserID'];
try {
$query="INSERT INTO user_list(UserID,ListID,UserRights) VALUES ('$user',$lastID,'$rights')";
$stmt = $conn->prepare($query);
$stmt->execute();
}
catch(PDOException $e)
{
die ($e->getMessage().' Back');
$conn->rollBack();
}
}
}
$conn = null;
?>
<div id="stylized" class="myform">
<div style="text-align:center;font-weight:bold;">You have created a list. By default Mail Address, First Name , Last Name is in your list. Add more field if you want. <a href='add.php'>Back</a></div>
<div class="spacer"></div>
</div>
<?
}else{?>
<!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>
<style type="text/css">
#import "../plugin/easyui/themes/default/easyui.css";
#import "../plugin/easyui/themes/icon.css";
#import "../style/form.css";
#import "../plugin/datatable/media/css/demo_page.css";
#import "../plugin/datatable/media/css/demo_table.css";
</style>
<script src="../plugin/jquery-1.6.1.min.js"></script>
<script type="text/javascript" src="../plugin/easyui/jquery.easyui.min.js"></script>
<script src="../plugin/jquery.validate.min.js"></script>
<script type="text/javascript" src="../plugin/datatable/media/js/jquery.dataTables.js"></script>
<script src="../plugin/jquery.form.js"></script>
<script>
$(document).ready(function(){
$("#addlist").validate();
});
$(document).ready(function() {
$('#viewSub').dataTable();
} );
</script>
</head>
<body>
<div id="stylized" class="myform">
<form id="addlist" method="post" action="add.php" >
<h1>Create your new subscriber list</h1>
<p>Create a new list before adding subscriber <label class="right"><em class="dot">*</em> indicates required</label></p>
<label><em class="dot">*</em> List name:
<span class="small">Add your list name</span>
</label>
<input id="lname" name="lname" class="required" />
<div class="spacer"></div>
<label>Reminder:
<span class="small">Remind the details of your list</span>
</label>
<textarea id="creminder" name="creminder" cols="52" ></textarea>
<div class="spacer"></div>
<div class="spacer"></div>
<p>Email me when ...</p>
<label>People subscribe:</label> <input type="checkbox" class="checkbox" name="subscribe" value="1">
<label>People unsubscribe:</label> <input type="checkbox" class="checkbox" name="unsubscribe" value="1">
<div class="spacer"></div>
</div>
</br>
<div id="stylized" class="myform">
<p>Permission Setting ...</p>
<label>Open to other users:</label> <input type="checkbox" class="checkbox" name="public" value="1">
Or
<div class="spacer"></div>
Select the permission for individual user:
<?
$sql =
"SELECT UserID,Name,Rights,Position
FROM user
WHERE UserID != ?
AND Rights != 'Admin'
";
$stmt = $conn->prepare($sql);
$stmt->execute(array($_SESSION['username']));
$num_rows= $stmt->rowCount();
if ($num_rows != 0){
$result = $stmt->fetchAll();
?>
<table width="100%" class="display" id="viewSub">
<thead>
<tr>
<th field="col1" width="40%">Name:</th>
<th field="col2" width="40%">Position:</th>
<th field="col2" width="20%">Permission:</th>
</tr>
</thead>
<tbody>
<?
foreach ($result as $set)
{
echo "<tr><td>".$set['Name']."</td><td>".$set['Position']."</td><td><select name=".$set['UserID']."><option value='default'>Not Share</option><option value='read'>Read Only</option><option value='edit'>Editable</option></select></td></tr>";
}
?>
</tbody>
</table>
<?
}
else
echo "There is no another user in this system";
?>
<input class="submit" type="submit" name="submit" value="Submit"/>
<div class="spacer"></div>
</form>
<div class="spacer"></div>
</div>
<br><br><br>
<div id="stylized" class="myform">
<?
try{
$sql = '
SELECT *
FROM list,user_list
WHERE user_list.UserID=?
AND list.ListID=user_list.ListID
';
$stmt = $conn->prepare($sql);
$stmt->execute(array($_SESSION['username']));
$result= $stmt->fetchAll();
$num_rows= $stmt->rowCount();
}
catch(PDOException $e)
{
die ($e->getMessage().' Back');
}
$conn = null;
if ($num_rows == 0) {
echo '<div style="text-align:center;font-weight:bold;">You have not created any list yet.</div>';}
else {
echo '<h1>Your Subscriber List</h1> <p>You have created '.$num_rows.' list(s).</p>';
foreach ($result as $set)
{
echo '<div style="font-weight:bold;">List Name : '.$set['FromName'].'</div><br>';
echo '<div style="font-weight:bold;">Subscriber : </div><br>';
echo '<div style="font-weight:bold;">Create Date : '.$set['CreateDate'].'</div><br>';
echo '<hr>';
}}
?>
<div class="spacer"></div>
</div>
</div>
</body>
</html>
<?
}
?>

Answer 1

Note the method you are using to submit the form. There are two general ways
GET Method <form method="GET" ... >
This is generally retrieved by using
echo $_GET['123023d'];
POST Method <form method="POST" ... >
This is generally retrieved by using
echo $_POST['123023d'];
If no method is defined, by default, it will be submitted using GET method so, use
$rights=$_GET['123023d'];
Update
I found your problem, there is no quotes in the title of select box
<select name=".$set['UserID'].">
Change it to this. You have to provide the quotes and escape them as well.
<select name=\"".$set['UserID']."\">
Update 2
Credit to #zerkms
The another problem was starting the name with a numeric value instead of a alphabetically character.
<select name="123023d">
Make sure you dont start with numbers like
<select name="a123023d">

Answer 2

How to retrieve value from a select box?
it is stored in the $_POST['123023d'] or $_GET['123023d'] variable depends on the method used.

Answer 3

If it is a 'post' request , use :
$rights=$_POST['123023d'];
For 'get' requests :
$rights=$_GET['123023d'];