Php 在我的代码中有一个如何解决的错误

我的代码怎么了

<?php 
session_start();
require_once('koneksi.php');
$username = $_POST['username'];
$pass = $_POST['password'];
$cekuser = mysqli_query($conn,"SELECT * FROM user WHERE username = '$username'");
$hasil = mysqli_fetch_array($cekuser);
if(mysqli_num_rows($cekuser) == 0) {
    echo "<div align='center'>Username Belum Terdaftar! <a href='login.php'>Back</a></div>;
} else{
  if($pass<>$hasil['$username]'){
    echo "<div align='center'>Password Salah! <a href='login.php'>Back</a></div>;
 }  else{
    $_SESSION['username']=$hasil['username'];
    header('location:index.php');
  }
}

?>

我收到这样的错误消息

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解析错误：语法错误，意外的T_封装的_和_空格，在第11行的/storage/emulated/0/htdocs/proseslogin.php中应为“-”或标识符T_字符串或变量T_变量或数字T_NUM_字符串，此处缺少结束引号

echo "<div align='center'>Username Belum Terdaftar! <a href='login.php'>Back</a></div>;

这里呢

echo "<div align='center'>Password Salah! <a href='login.php'>Back</a></div>;

你需要关闭你的报价

echo "<div align='center'>Username Belum Terdaftar! <a href='login.php'>Back</a></div>";

echo "<div align='center'>Password Salah! <a href='login.php'>Back</a></div>";

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检查缺少的报价