问题得到函数结果回声

Question

I just started learning more about functions and am currently stuck on one part of them. I am trying to get the result of the function that I set in the return to populate in html in a specific spot.

Does anyone see what I am doing wrong?

Here is the error message:

PHP Fatal error: Uncaught ArgumentCountError: Too few arguments to function profilePic(), 0 passed in /adminNav.php on line 76 and exactly 1 expected in /adminNav.php:6 Stack trace:

0 /adminNav.php(76): profilePic()

1 /admin/project-gallery.php(93): include('pub...')

2 {main} thrown in /adminNav.php on line 6

Full code:

function profilePic($con) {
    try {
        //Profile pic in main
        $sqlProfileImg = "
            SELECT *
            FROM profile_img
            WHERE user_id = ?
            ORDER BY id DESC
            LIMIT 1
            ";
        if ($stmtProfileImg = $con->prepare($sqlProfileImg)) {
            $stmtProfileImg->execute(array($user_id));

            $default_profile_img = NULL;
            $userProfilePic = NULL;
            $profilePic = NULL;
            $profilePicRows = $stmtProfileImg->fetchAll(PDO::FETCH_ASSOC);
            foreach ($profilePicRows as $profilePicRow) {
                $profilePic = $profilePicRow['img'];
                $profilePic = (!empty($profilePic) && $profilePic != 0)? $profilePic : "profile_images/default.jpg"; ?>" alt="<?php echo (!empty($profilePic) && $profilePic != 0)? "Profile Picture" : "No Picture";
            }
        }
    } catch (PDOException $e) {
        echo "Connection failed: " . $e->getMessage();
        $date = new DateTime();
        file_put_contents('error_log_profile_pic', "
[{$date->format('Y-m-d H:i:s')}]" . "Error adding attachment: 
" . print_r($e, 1), FILE_APPEND);
        return false;
    }
    return $profilePic;
}

HTML

<img id="navUserProfilePic" src="<?php profilePic(); ?>">

Answer 1

You need to pass a parameter to that function

For example, like this

<img id="navUserProfilePic" src="<?php echo profilePic($con); ?>">
                                       ^^^^            ^^^^

Your other issue is SCOPE. The function know's nothing about a variable called $user_id