PHP错误更新注意：未定义的索引：

Question

我尝试更新表格，但是告诉我这个错误，我在邮递员中测试，但我不知道发生了什么

  

注意：未定义的索引：第12行的F：\ wamp64 \ www \ app \ server \ php_tracker_server \ myapp_save.php中的纬度

我在邮递员中附上图片显示错误

<?php

if ( $_SERVER[ "REQUEST_METHOD" ] == "POST" ) {
    require 'myapp.php';
    myapp();
}

function myapp() {
    global $connect;

    $id = $_GET["id"]; 
    $latitude = $_POST[ "latitude" ];
    $latitude       = (float)str_replace(",", ".", $latitude);
    $longitude = $_POST[ "longitude" ];
    $longitude       = (float)str_replace(",", ".", $longitude);
    $date = $_POST[ "date" ];
    //$appID = $_POST[ "appID" ];
    $ruta = $_POST[ "ruta" ];


    $query = "update escolar_tracker set latitude='$latitude',longitude='$longitude',date='$date',ruta='$ruta' where id=$id";
    //$query = "Insert into mi_app(latitude, longitude, date, appID, ruta) VALUES ('$latitude','$longitude','$date','$appID','$ruta')";

    mysqli_query( $connect, $query )or die( mysqli_error( $connect ) );
    mysqli_close( $connect );
}

?>