Checkbox Retrieval Question

brendan2b

Ok so I have a page displaying images, with corresponding checkboxes on each. And they can select the images they want to delete. Here is the form code

<input type="checkbox" name="select[]" value="<? print $imageID; ?>">

It is in a form tag but there is alot of code inbetween so Im not going to post that.

I know on the php page I have to call that into an array. But I need to verify which boxes have been checked, and they run a query on all those images based on there Id so I can delete the photos by Id which have been checked. I have no idea where to start besides

$checked = array();

Im not sure how to call that and to retrieve the checked boxes based on image ID

There are a different number of checkboxes on the previous page evrey time because there is one checkbox per image, and based on each user they have different amounts of images.

Thanks so much. Help is appreciated.

cahva

You can iterate through the array. In your example the checked ones would in $POST['select']. Try it:

if (isset($_POST['select'])) {
	foreach ($_POST['select'] as $v) {
		// This just prints em. You would put your delete code here
		echo 'Delete '.$v.'<br>';
	}
}

brendan2b

Hmmm its not working write I dont think, see if you can see an error, I have 3 submit buttons on my form, and it first check for which button and then executes the delete/move/commands.

<?



session_start();
$username = $_SESSION['username'];
if ($_SESSION['logged']!==true) {
   header('location:loginfailed.php');

} 
else {

$buttonName = $_POST['submit'];
$checkbox = array();

if($buttonName == "Delete Selected Photos")
{
	if (isset($_POST['select']))
	 {
    foreach ($_POST['select'] as $v) {
        // This just prints em. You would put your delete code here
        echo 'Delete '.$v.'<br>';
      								}
	 } 


}



if($buttonName == "Move Selected Photos")
{


}


if($buttonName == "Give me the code!")
{


}




}

?>

I am just trying to work on printing things out so I kno if the code wordks and if it selects the proper boxes or not.

brendan2b

Like I just put that bit of code in that was yours to test it out, and I was gunna obviously edit it to my needs at a later time, but I cant quite get it to spit anything out.

brendan2b

Ok I got it to work, but the code is only printing out the first checkbox value even if the others are checked. Any reason for this?

cahva

Are all checkboxes the same name? They should be name="select[]". Try to debug a little. Put this at the beginning:

echo '<pre>'.print_r($_POST,true).'</pre>';

It will output all $_POST variables. You can see from that if there is some error in your form.

brendan2b

There is only one check box.


while($user_photos = mysql_fetch_array( $data ))
		{
                         <input type="checkbox" name="select[]" value="<? print      $imageID; ?>">

   }

I have tried a little debugging and looking around for different cases. But my case only involves one checkbox and for some reason it only outputs the first checkbox value in the array. I have also tried calling and printing the array several different ways.

Weedpacket

Could you clarify what you mean by "There is only one checkbox"? Do you mean "there are several checkboxes, all named "select[]"? That's what cahva means by "all checkboxes the same name". Otherwise the reason you're only getting one checkbox value is because you only have one checkbox, and I'm sure that's not your problem.

What do you get as the value of $_POST['select'] when you select several checkboxes and submit?

brendan2b

I apologize for not making it clear enough. I will try again.

For each row in the database corresponding to someones username. It outputs the image name in that row, the image ID (the value of the checkbox) and one checkbox named "select[]".

If the user has uploaded only one image, then there is only one checkbox named "select[]".

If they have uploaded 2 images there are 2 checkboxes named "select[]" and so on.

I purposely put the image ID above each checkbox so I know what the value should be.

In my case and what I am testing, I have 3 images, with ID's 27, 20, and 24.

Here is my script that acts after I submit the data.

<?



session_start();
$username = $_SESSION['username'];
if ($_SESSION['logged']!==true) {
   header('location:loginfailed.php');

} 
else {

echo '<pre>'.print_r($_POST,true).'</pre>';
$buttonName = $_POST['submit'];
$imageID = $_POST['select'];
$count = count($imageID);


   if ($count != 0)
     {
           if($buttonName == "Delete Selected Photos")
             {


    echo '<pre>'.print_r($_POST,true).'</pre>';




              }
     }


    if($buttonName == "Move Selected Photos")
        {


            }


    if($buttonName == "Give me the code!")
        {


         }

}




}
?>

Even though I check all 3 boxes, the script gives me this.

Array
(
    [submit] => Delete Selected Photos
    [url] => http://www.photocooler.com/photos/brendan_forum.jpg
    [code=html] => 
    [img] => [IMG]http://www.photocooler.com/photos/brendan_forum.jpg[/IMG]
    [select] => Array
        (
            [$imageID] => 27
        )

)

the Image ID 27 is corresponding to the first checkbox. If I only check the last 2 checkboxes and not the first, I get this message.

Array
(
    [submit] => Delete Selected Photos
    [url] => http://www.photocooler.com/photos/brendan_forum.jpg
    [code=html] => 
    [img] => [IMG]http://www.photocooler.com/photos/brendan_forum.jpg[/IMG]
)

So pretty much there is no values in the array unless the first checkbox is selected. And when the first checkbox is selected, I somehow only receive that value although I checked all 3.

I hope this helps, cause this problem bothered me from the start of my project and I put it aside until I really needed it. Thanks again guys.

ahundiak

    [select] => Array
        (
            [$imageID] => 27
        )

Assuming the above is a cut and paste the the $imageID string indicates your html is messed up. Use View Source to check the actual html being generated. Paste some of it in here if you still cannot see the problem.

brendan2b

I figured it all out guys. My submit buttons were above the checkbox in the form, and when I put them as the last items in the forms it worked perfectly. Thanks.

Weedpacket

brendan2b wrote:
and when I put them as the last items in the forms it worked perfectly.

Okayyy.... glad you got it fixed.......