Problem Passing Checkbox Value Through Post

[sonal]

I have to pass selected checkbox value from one script to another. However, my checkbox selection never passes to the receiving page. My scripts are as follow:

 

 

function chkBox($str) {

echo "<div><input type='checkbox' name='member[]' value='$str'>" .ucfirst($str). "</div>";

 

}

 

$q = "SELECT * from users";

 

//Run the query:

$r = mysqli_query($dbc, $q) or trigger_error("Query: $q\n<br />MySQL Error: " . mysqli_error($dbc));

 

 

if(mysqli_num_rows($r) > 0)

{

//Asimple message to show:

 

//start a table with header row:

echo '<table align="center" cellspacing="10" cellpadding="10" width="80%"><tr class="rowH">

<th><a href="newbookentry.php">Add Book for</a></th> // user will click this link to go to receiving script

 

echo '<form action="newbookentry.php" method="post">

while($row = mysqli_fetch_row($r))

{

 

// list out member names in a horizontal row:

echo '<tr class="rowA">';

echo '<td>';

chkBox($row[2]);

// next things }

 

Second (receiving script): newbookentry.php

 

 

//check if a checkbox is selected:

if(isset($_POST['member']) && !empty($_POST['member'])) {

$mems = $_POST['member'];

//echo $mems;

} else {

$errors[] = 'Please select at least 1 member name.';

echo "Please select a member.";

}

 

// more

 

This script always shows error message, even if I select single/multiple checkboxes on first page.

[Antonio Conte]

Checked that the query actually returns what you want from it? It's often the basic that fails.

 

Secondly. print_r()'s your friend. Your BEST friend. Use it for what it's worth. Carve this into your forehead and tattoo it on your arm:

 

echo '<pre>' , print_r($var) , '</pre>';

 

Use that on the $_POST array and the db result.

[margaux]

In newbookentry.php, you could try something like

if (isset($_POST['member'])) {
 $members = implode(", ",$_POST['member']);
}
else {
 $members='Please select a member';
}
echo $members;

 

If the data is going to be stored in a d/b, I like to give each checkbox a unique name e.g. member1, member2 etc. Then you can loop through them to identify each checkbox specifically.

[sonal]

Thanks for the reply, Antonio and Margaux.

 

The problem is I'm using link in between 2 scripts. If I use a submit button, then it works fine. So it looks like the form is submitted by "submit" button, and not by a hyper link.

 

( I would like to know how to do that with a link, though)

[Larry]

You cannot submit a form using a link. Well, you could, using JavaScript, but that would be a bad solution.

[sonal]

Thanks Larry, I got it now.