$_SERVER["REQUEST_METHOD"] == "POST" 中未定义的索引

Question

I have code with php, when I run then display an error message

PHP Notice: Undefined index: esn /var/www/html/sat line 10

PHP Notice: Undefined index: lat /var/www/html/sat line 11

PHP Notice: Undefined index: lon /var/www/html/sat line 12

PHP Notice: Undefined index: status /var/www/html/sat line 13

Each made the call http://domains.com/sat/index.php?esn=value1&lat=value2&lon=value3&status=value4 and the results of calling these parameters are always "NULL".

We may be given a solution to this case. Thanks

below this source code error:

if ($_SERVER["REQUEST_METHOD"] == "POST") 
    {
      $postText=file_get_contents('php://input');
      //collect value of input field
      $esn = $_POST['esn'];
      $lat = $_POST['lat'];
      $lon = $_POST['lon'];
      $status = $_POST['status'];
      fwrite($postText);
      fclose($FileHandle);

      if ($postText) 
      {
         echo "Nomor ESN: ".$esn."<br>";
         echo "Latitude: ".$lat."<br>";
         echo "Longitude: ".$lon."<br>";
         echo "status: ".$status."<br>";
      }else{
         echo "NULL";
      }    
    }

Answer 1

您的数据，即使您通过表单发送，现在都在 URL 中，因此它们在 $_GET 中而不在 $_POST 数组中

Answer 2

You use GET method while you access data using Post method. so you getting variable is null. Use bellow code for GET method

if ($_SERVER["REQUEST_METHOD"] == "GET") 
    {
      $postText=file_get_contents('php://input');
      //collect value of input field
      $esn = $_GET['esn'];
      $lat = $_GET['lat'];
      $lon = $_GET['lon'];
      $status = $_GET['status'];
      fwrite($postText);
      fclose($FileHandle);

      if ($postText) 
      {
         echo "Nomor ESN: ".$esn."<br>";
         echo "Latitude: ".$lat."<br>";
         echo "Longitude: ".$lon."<br>";
         echo "status: ".$status."<br>";
      }else{
         echo "NULL";
      }    
    }