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📄 Viewing: ./../../../../586837.klas4s23.mid-ica.nl/public_html/SendStation/messageCheck.php

<?php
session_start();

function uploadImage() {
    $target_dir = "imageupload/";
    $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
    $uploadOk = 1;
    $imageFileType = strtolower(pathinfo($target_file, PATHINFO_EXTENSION));
    
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check === false) {
        $uploadOk = 0;
    }

    if ($_FILES["fileToUpload"]["size"] > 15000000) {
        $uploadOk = 0;
    }
    
    if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
    && $imageFileType != "gif" ) {
        $uploadOk = 0;
    }
    
    if ($uploadOk == 0) {
        return null;
    } else {
        if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
            return $target_file;
        } else {
            return null;
        }
    }
}

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Check if a message has already been sent in this session
    if (!isset($_SESSION['message_sent'])) {
        $name = htmlentities($_POST['name']);
        $message = htmlentities($_POST['message']);
        $timestamp = time();
        $formattedDate = date('H:i | d-m-y', $timestamp);
        $picture = null;
        if(isset($_FILES['fileToUpload']) && $_FILES['fileToUpload']['error'] == UPLOAD_ERR_OK) {
            $picture = uploadImage();
        }

        $new_messages = array(
            'name' => htmlentities($name),
            'message' => htmlentities($message),
            'timestamp' => $formattedDate,
            'imagepath' => $picture
        );

        $json_data = file_get_contents('messageData.json');
        $assoc_data = json_decode($json_data, true);

        $assoc_data[] = $new_messages;

        file_put_contents('messageData.json', json_encode($assoc_data, JSON_PRETTY_PRINT));

        // Mark message as sent in this session
        $_SESSION['message_sent'] = true;

        header('Location: messages.php');
        exit(); // It's a good practice to exit after a redirect
    } else {
        // Message has already been sent in this session, do not process again
        // Optionally, you can redirect the user to some other page or display a message
        header('Location: messages.php?error=already_sent');
        exit();
    }
}

?>

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