意外的 T_ENCAPSED_AND_WHITESPACE [重复]

Question

如果有人看到我看不到的东西，我已经看过但不知道我的错误在哪里，你能指出我正确的方向来解决这里是我的代码

 $con=mysqli_connect("localhost", $user_name, $password, $database_name);
 // Check connection
 if (mysqli_connect_errno())
 {
 echo "Failed to connect to MySQL: " . mysqli_connect_error();
 }

  $result = mysqli_query($con,"SELECT * FROM `$table_name` WHERE energy < 30");

  while($row = mysqli_fetch_array($result))
 {
  $newenergy = $row['energy'] + 1;
mysqli_query($con,"UPDATE $table_name SET energy = $newenergy WHERE uuid =$row['uuid']");
}

enter code here

mysqli_close($con);
 ?>

Answer 1

改变

mysqli_query($con,"UPDATE $table_name SET energy = $newenergy WHERE uuid =$row['uuid']")

到

mysqli_query($con,"UPDATE $table_name SET energy = $newenergy WHERE uuid ={$row['uuid']}")

对于复杂变量，您需要使用 {} syntax。