解析错误：语法错误，第25行C：\ wamp \ www \ Registration \ form.php中的意外“if”（T_IF）

Question

我正在创建一个重新注册表单并尝试从php到数据库的数据但是我收到此错误：解析错误：语法错误，C：\ xampp \ htdocs \ ci_bc \ application \ controllers \ user.php中的意外T_IF第25行...任何想法的家伙？我真的没有在这段代码中看到任何错误。请帮助我，我是Php语言的新手。

<?php
session_start();
$_SESSION['message'] = '';
$mysqli = new mysqli("localhost", "root", "wiki", "CourseManagement");

//the form has been submitted with post

    if ($_SERVER["REQUEST_METHOD"] == "POST") {

        //two passwords are equal to each other
        if ($_POST['password'] == $_POST['confirmpassword']) {

            //set all the post variables
            $username = $mysqli->real_escape_string($_POST['username']);
            $email = $mysqli->real_escape_string($_POST['email']);
            $password = md5($_POST['password']); //md5 has password for security
            $avatar_path = $mysqli->real_escape_string('images/'.$_FILES['avatar']['name']);

            //make sure the file type is image
            if (preg_match("!image!",$_FILES['avatar']['type'])) {

                //copy image to images/ folder
                if (copy($_FILES['avatar']['tmp_name'], $avatar_path)){

                    //set session variables
                    $_SESSION['username'] = $username;
                    $_SESSION['avatar'] = $avatar_path;

                    //insert user data into database
                    $sql = "INSERT INTO users (username, email, password, avatar) "
                            . "VALUES ('$username', '$email', '$password', '$avatar_path')";

                    //if the query is successsful, redirect to welcome.php page, done!
                    if ($mysqli->query($sql) === true){
                        $_SESSION['message'] = "Registration succesful! Added $username to the database!";
                        header("location: welcome.php");
                    }
                    else {
                        $_SESSION['message'] = 'User could not be added to the database!';
                    }
                    $mysqli->close();
                }
                else {
                    $_SESSION['message'] = 'File upload failed!';
                }
            }
            else {
                $_SESSION['message'] = 'Please only upload GIF, JPG or PNG images!';
            }
        }
        else {
            $_SESSION['message'] = 'Two passwords do not match!';
        }
    }
    ?>
    <link href="//db.onlinewebfonts.com/c/a4e256ed67403c6ad5d43937ed48a77b?family=Core+Sans+N+W01+35+Light" rel="stylesheet" type="text/css"/>
    <link rel="stylesheet" href="form.css" type="text/css">
    <div class="body-content">
      <div class="module">
        <h1>Create an account</h1>
        <form class="form" action="form.php" method="post" enctype="multipart/form-data" autocomplete="off">
          <div class="alert alert-error"><?= $_SESSION['message'] ?></div>
          <input type="text" placeholder="User Name" name="username" required />
          <input type="email" placeholder="Email" name="email" required />
          <input type="password" placeholder="Password" name="password" autocomplete="new-password" required />
          <input type="password" placeholder="Confirm Password" name="confirmpassword" autocomplete="new-password" required />
          <div class="avatar"><label>Select your avatar: </label><input type="file" name="avatar" accept="image/*" required /></div>
          <input type="submit" value="Register" name="register" class="btn btn-block btn-primary" />
        </form>
      </div>
    </div>