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  1. #1
    Senior Coder doubledee's Avatar
    Join Date
    Mar 2011
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    Passing Array in $_POST

    I could really use some help trying to figure this problem/script out.

    Here is what I am trying to do...

    I built a Private Messaging module for my website, and everything works great except for one tiny thing.

    My PM system looks very similar to Yahoo Mail, with a Header Row across the top which has these columns: Select, Flag, From, Message, Date.

    In the Select Column, I have a check-box next to each Message. This allows a user to check certain Message, and then choose a value (e.g. "Mark as Read") in a drop-down list in the Header when they press "Go".

    I have the check-boxes working if a user cherry-picks individual messages, chooses an "action" and presses "Go".

    But what I also want, is the ability to check the Check-box in the Header, and when the user selects an "action" and "Go", my PHP applies the "action" to EVERY Message even though only the Top Check-box was checked. (Follow me?!)

    Now, a KEY CONSTRAINT here is that I do NOT want to use JavaScript. That simple. Period. (No arguments, please!!)

    Here is the server-side strategy I have come up with, and I think I'm close to getting it working, but I just need some help with passing an array in my $_POST array...

    At the top of my PHP script I have...
    PHP Code:
        // Initialize Test Array.
    $incomingArray = array(); 

    A little farther down I have...
    PHP Code:
        // ***************************************
        // HANDLE FORM.                         *
        // ***************************************
    // Form was Submitted (Post).

            // ****************************
            // Check for Message Action.    *
            // ****************************
    if ($_POST['pmAction']=="In_Unread"){

    // **************************
                // Mark Incoming as Unread.    *
                // **************************

    foreach($_POST['inMsgArray'] as $msgID => $msgValue){

    // This doesn't work, but I feel it should?!
    //            foreach($_POST['incomingArray'] as $msgNo => $inMsgArray['pmID']){

                    // Build query.
    $q1 "UPDATE private_msg_recipient
                            SET read_on=NULL,
                            WHERE member_id_to=?
                            AND message_id=?
                            LIMIT 1"

    // Prepare statement.
    $stmt1 mysqli_prepare($dbc$q1);

    // Bind variables to query.

    // This doesn't work, but I feel it should?!
    //                mysqli_stmt_bind_param($stmt1, 'ii', $sessMemberID, $inMsgArray['pmID']);

                    // Execute query.

    // Verify Update.
    if (mysqli_stmt_affected_rows($stmt1)==1){
    // Update Succeeded.
    $redirectView 'incoming';


    Then farther down in my PHP I have...
    PHP Code:
    // Form was not Submitted (Get).

            // **************************
            // Determine PM View-Type.    *
            // **************************
    if (isset($_GET['msgview']) && $_GET['msgview']){
    // Message-View found in URL.

                // More code here...

                    // ****************************
                    // Create 'Incoming' Dataset.    *
                    // ****************************
                    // Execute query.

    // Store results.

    // Check # of Records Returned.
    if (mysqli_stmt_num_rows($stmt6) > 0){
    // Messages Found.
    $messagesExist TRUE;

    // Bind result-set to variables.

                        // Set Incoming Array Counter.
    $i 1;

    // Fetch record.
    while (mysqli_stmt_fetch($stmt6)){
    // Build Incoming Array.
    $incomingArray[$i] = array('pmID' => $pmID,
    'readOn' => $readOn,
    'flag' => $flag,
    'fromID' => $fromID,
    'fromUsername' => $fromUsername,
    'subject' => $subject,
    'sentOn' => $sentOn);
    $i $i 1;


    Finally in HTML section I have...
    PHP Code:
        // ****************************
        // Create 'Incoming' Output.    *
        // ****************************

    <!-- LOOK HERE -->
    Column Headings -->
    th class='colSelect' />
    input name='incomingArray[]' type='checkbox' value='TRUE' />
    th id='colFlag'>
    img src='/images/Flag_Red_20x22.png' width='15' alt='' />
    th id='colFrom'>From</th>
    th id='colSubject'>Subject</th>
    th id='colDate'>Date</th>

    Body Data -->

        // Retrieve Messages from Array.
    $incomingArray as $msgNo => $inMsgArray){
            echo "
    <tr" . (is_null($inMsgArray['readOn']) ? " class='pmUnread'" : "") . ">
    td class='colSelect'>
    input id '" . str2htmlentities($inMsgArray['pmID']) . "' " .
    name inMsgArray[" . str2htmlentities($inMsgArray['pmID']) . "" .
    type 'checkbox' " .
    value 'TRUE'

    Problem Summarized:
    If I check individual messages and then choose an "action" (e.g. "Mark as Read"), and then "Go", my script works.

    The problem I am trying to solve, is a way to pass the $incomingArray - which contains a listing of all Incoming Messages displayed - and pass that array in my $_POST array, so that when my Form is submitted, and if I determine that the Top Check-box was checked, then I can grab the listing of all Incoming Messages from this array that I stuffed in the $_POST array, and use that when I run my UPDATE Query.

    As I found out the hard way, even though I might have 20 check-boxes corresponding to 20 Incoming Messsages, if you don't check any of the check-boxes, then the $_POST array acts like you have no check-boxes at all?!

    So I figured that if I populate $incomingArray with *every* Incoming Message, and then I pass that in the $_POST, then all I need to do is determine if the Top Check-box was checked, and then use that list to update things.

    Unfortunately, I am having troubles with passing this array in my $_POST.

    Can someone please help me figure this out?!



  2. #2
    Master Coder
    Join Date
    Feb 2011
    Your Monitor
    Thanked 614 Times in 600 Posts
    Quote Originally Posted by doubledee View Post
    As I found out the hard way, even though I might have 20 check-boxes corresponding to 20 Incoming Messsages, if you don't check any of the check-boxes, then the $_POST array acts like you have no check-boxes at all?!
    Thats how it is supposed to work. Thats how your email list in yahoo, hotmail etc works when you select only certain messages to delete - the browser only sends the values you checked. It can cause a few head scratching moments to begin with as you expect it to send a true/false for each box instead but you soon get used to it - it's really quite logical.

    The alternative way you could do it if you wanted a guaranteed value to be sent with your top checkbox is use hidden values instead for each item:

    <input type="hidden" name="incomingArray[]" value="1">
    <input type="hidden" name="incomingArray[]" value="3">
    <input type="hidden" name="incomingArray[]" value="4">

    Note that you would need to ignore these if the user doesn't select the top checkbox and just makes a normal selection with the normal checkboxes. You would process the hidden inputs purely if the top checkbox is selected.
    Quote Originally Posted by deathshadow View Post
    So seriously, loosen up that tie, let out the belt, and try relating to normal people on the street instead of the gentleman's club crowd.


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