意外的T_ENCAPSED_AND_WHITESPACE

Question

我已经看过了，不知道我的错误在哪里，如果有人看到我没有看到的东西，你能给我指出正确的方向来修复吗?这是我的代码

 $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

变化

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

至

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

对于复杂的变量，您需要使用{} syntax。