Getting an id value

Question

I'm currently working on a friendshipsystem. To accept a friend I need to get the friendship_id value.

Based on the email (from the session) I can get a lot of information, such as surname, name, photo, ID NUMBER,... from the specific friendshiprequest

I can print the information for each friendship in this way. So I have the FRIENDSHIP ID VALUE TO DISPLAY AS INFORMATION but now I want to use it in a function.

$friendrequests=$friendship->GetAllFriendRequests($email);

<?php
    foreach ($friendrequests as $request) {
    echo "
        <div><p>
            <a href='profile.php?user_id=".$request['friendship_applicant_id'] . "'>
                <img src='uploads/" . $request['friendship_applicant_avatar']  . " " . " ' alt='' />" . $request['friendship_applicant_surname'] . $request['friendship_id'] . " " . $request['friendship_applicant_name'] . "
            </a> has send you a friend request" . "

            <form action='" . $_SERVER['REQUEST_URI'] . "' method='post'>
                <button type='submit' name=''>Accept</button>
                <button type='submit' name=''>Decline</button>
            </form>
        </p></div>";   
}
                    ?>

So i tried to get the specific number with the following code, but it says undefined index for friendship_id: $friendrequestnumber = $friendrequests['friendship_id'];

This is the code the GetAllFriendRequests function. Can I use this code or should I do it in a totally different way?

public function GetAllFriendRequests($email) {
    $db = new Db();

    $select = "SELECT * FROM friendship WHERE friendship_recipient = '" . $email . "' AND friendship_status = 'pending' ORDER BY friendship_id DESC";

    $result = $db -> conn -> query($select);

    $result_array=array();
    while ($row = mysqli_fetch_array($result)) {
         $result_array[]=$row;                                                                                          
    }
    return $result_array;

}

With a var_dump I get this information of the 2 requests:

Array ( [0] => Array ( [0] => 84 [friendship_id] => 84 [1] => ron@hot.com [friendship_applicant] => ron@hot.com [2] => 29 [friendship_applicant_id] => 29 [3] => ron [friendship_applicant_name] => ron [4] => ron [friendship_applicant_surname] => ron [5] => 1394134610fuckyou.jpg [friendship_applicant_avatar] => 1394134610fuckyou.jpg [6] => jan@hot.com [friendship_recipient] => jan@hot.com [7] => 1 [friendship_recipient_id] => 1 [8] => Vandenbergh [friendship_recipient_name] => Vandenbergh [9] => Jan [friendship_recipient_surname] => Jan [10] => 1394041001fuckyou.jpg [friendship_recipient_avatar] => 1394041001fuckyou.jpg [11] => Pending [friendship_status] => Pending [12] => 0000-00-00 00:00:00 [friendship_time] => 0000-00-00 00:00:00 ) [1] => Array ( [0] => 78 [friendship_id] => 78 [1] => Bert@hot.com [friendship_applicant] => Bert@hot.com [2] => 2 [friendship_applicant_id] => 2 [3] => Van Damme [friendship_applicant_name] => Van Damme [4] => Bert [friendship_applicant_surname] => Bert [5] => sdfds.png [friendship_applicant_avatar] => sdfds.png [6] => Jan@hot.com [friendship_recipient] => Jan@hot.com [7] => 1 [friendship_recipient_id] => 1 [8] => Vandenbergh [friendship_recipient_name] => Vandenbergh [9] => Jan [friendship_recipient_surname] => Jan [10] => 1394041001fuckyou.jpg [friendship_recipient_avatar] => 1394041001fuckyou.jpg [11] => Pending [friendship_status] => Pending [12] => 0000-00-00 00:00:00 [friendship_time] => 0000-00-00 00:00:00 ) )

Now he's updating but at the same time I get an error (Fatal error: Call to a member function fetch_assoc() on a non-object) at this line in my function AcceptFriendRequest:

'the return $data=$result->fetch_assoc();'

public function AcceptFriendRequest($requestnumber){ $db = new Db(); 
$select = "UPDATE friendship SET friendship_status = 'Accepted' WHERE 
friendship_id ='" . $requestnumber . "'"; $result = $db->conn->query($select); 
return $data=$result->fetch_assoc(); }

Answer 1

GetAllFriendRequests function

The structure of the array you're returning is the problem. Instead of

while ($row = mysqli_fetch_array($result)) {
    $result_array[]=$row;
}

Do:

while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
    $result_array[]=$row;
}

Also, FYI, you don't need this line in the GetAllFriendRequests function:

$result_array=array();

Because the brackets in this line (inside the while loop) make it an array automatically:

 $result_array[]=$row;  

Main PHP file

Your form in your main PHP file needs to change as well. This prints out all the relevant data, but I've changed a few things - both submit buttons now have a name, so they will appear in the POST array. Also, there is a hidden input with the friendship_id you'll need to run your AcceptFriendRequest function. If they click Accept, then (1) the data is POSTed back to the same file and the pages refreshes, (2) the if(isset) condition checks to see if they have accepted the request. (3) It calls the AcceptFriendRequest function using the friendship_id we stored in the hidden input. Each form on the page will have a hidden input like this. You may need other hidden inputs if you need more variables from the specific request - for instance if you need other data to run the Decline function.

<?php
foreach ($friendrequests as $request) {
echo "
    <div><p>
        <a href='profile.php?user_id=".$request['friendship_applicant_id'] . "'>
            <img src='uploads/" . $request['friendship_applicant_avatar']  . " " . " ' alt='' />" . $request['friendship_applicant_surname'] . $request['friendship_id'] . " " . $request['friendship_applicant_name'] . "
        </a> has send you a friend request" . "

        <form action='" . $_SERVER['REQUEST_URI'] . "' method='post'>
            <button type='submit' name='Accept'>Accept</button>
            <button type='submit' name='Decline'>Decline</button>
            <input type='hidden' name='acceptID' value='".$request['friendship_id']."' />
        </form>
    </p></div>";   
}//foreach

if (isset($_POST['Accept'])){
    $accepted = AcceptFriendRequest($_POST['acceptid']);
    //for debugging, you may want to uncomment this and watch what your function returns
    //echo $accepted;
}

if (isset($_POST['Decline'])){
    //some other function is the request is declined
}

?>