Untitled

<?php
session_start();
$errors = array();
if (count($errors) > 0) : ?>
    <div class="error">
        <?php foreach ($errors as $error) : ?>
            <p><?php echo $error ?></p>
        <?php endforeach ?>
    </div>
<?php  endif;
if (isset($_POST['reg'])) {
    $username = $_POST['username'];
    $email = $_POST['mail'];
    $password = $_POST['password'];
    $password2 = $_POST['password2'];
    if ($password != $password2) {
        echo "Passwords do not match";
    }
    $data = file_get_contents('users.json');
    $character = json_decode($data, true);
    echo '<pre>PRINT ARRAY: ' . print_r($character, true) . '</pre>';
    echo json_last_error();
        if (isset($_POST['reg'])) {
            $map = "uploads/";
            $image = $map . basename($_FILES["pic"]["name"]);
            $continue = 1;
            $imageFileType = strtolower(pathinfo($image, PATHINFO_EXTENSION));
            // Check if image file is a actual image or fake image
            if (isset($_POST["pic"])) {
                $check = getimagesize($_FILES["pic"]["tmp_name"]);
                if ($check !== false) {
                    echo "File is an image - " . $check["mime"] . ".";
                    $continue = 1;
                } else {
                    echo "File is not an image.";
                    $continue = 0;
                }
            }
            if ($_FILES["pic"]["size"] > 5000000) {
                echo "Sorry, your file is too large.";
                $continue = 0;
            } else {
                $file = fopen("users.json", "a");
            }
            if ($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
                && $imageFileType != "gif") {
                echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
                $continue = 0;
            } else {
                $file = fopen("users.json", "a");
            }
            if ($continue == 0) {
                echo "Sorry, your file was not uploaded.";
            } else {
                if (move_uploaded_file($_FILES["pic"]["tmp_name"], $image)) {
                    echo "<p class='filesaved'>The file " . basename($_FILES["pic"]["name"]) . " has been uploaded.<br></p>";
                    $file = fopen("users.json", "a");
                } else {
                    echo "Sorry, there was an error uploading your file.";
                }
            }

            if (!$file) {
                echo "Cant find the file";
            }
            if (isset($_POST['username']) && isset($_POST['mail']) && isset($_POST['password'])) {
                $user = htmlspecialchars($_POST['username']);
                $mail = htmlspecialchars($_POST['mail']);
                $password = htmlspecialchars($_POST['password']);
                $avatar = $image;
                $_SESSION["username"] = $user;
                $_SESSION["mail"] = $mail;
                $username = $_SESSION["username"];
                $data = $user . PHP_EOL . $mail . PHP_EOL . $password . PHP_EOL . $avatar . PHP_EOL . PHP_EOL;

                $myArr = array($user, $email, $password, $avatar);
                $myJSON = json_encode($myArr, JSON_FORCE_OBJECT);
                fwrite($file, $myJSON);
                fclose($file);
                echo "<!DOCTYPE html>
                <html lang=\"en\">
                <head>
                    <meta charset=\"UTF-8\">
                    <title>Succes</title>
                    <link rel=\"stylesheet\" href=\"styles.css\">
                </head>
                <body>
                    <p class=\"succestext\">Succes</p>
                    <script>
                    window.setTimeout(
                        function(){
                            window.location.href = \"home.php\";
                            }, 10000);
                    </script>
                </body>
                </html>";
            }
        }
}
if (isset($_POST['login'])) {
    $username = $_POST['username'];
    $password = $_POST['password'];
}