Make the PHP Script better

Sources/php_script/script/config.php

@@ -1,8 +1,13 @@
 <?php
-$username=$_ENV["CODEFIRST_CLIENTDRONE_ENV_INNODB_USER"];
+$username="dafldev";
-$host=$_ENV["CODEFIRST_CLIENTDRONE_ENV_INNODB_HOST"];
+$host="89.83.53.34";
-$password=$_ENV["CODEFIRST_CLIENTDRONE_ENV_INNODB_PASSWORD"];
+$password="wrap";
-$db_name=$_ENV["CODEFIRST_CLIENTDRONE_ENV_INNODB_DATABASE"];
+$db_name="positiondaflmusic";
 
 $connect=mysqli_connect($host,$username,$password,$db_name);
 
+if (mysqli_connect_errno()) {
+    print(json_encode("Failed to connect to MySQL"));
+    exit(-1);
+}
+

Sources/php_script/script/db.php

@@ -1,10 +1,7 @@
 <?php
-$dns = 'mysql:host='.getenv("CODEFIRST_CLIENTDRONE_ENV_INNODB_HOST").';dbname='.getenv("CODEFIRST_CLIENTDRONE_ENV_INNODB_DATABASE");
+$dns = 'mysql:host=89.83.53.34;dbname=positiondaflmusic';
-$user = $_ENV["CODEFIRST_CLIENTDRONE_ENV_INNODB_USER"];
+$user = 'dafldev';
-$password = $_ENV["CODEFIRST_CLIENTDRONE_ENV_INNODB_PASSWORD"];
+$password = 'wrap';
-echo "\n";echo "\n";echo "\n";
-echo $dns;
-echo "\n";echo "\n";echo "\n";
 try{
     $db = new PDO ($dns, $user, $password);
 }catch( PDOException $e){

Sources/php_script/script/distance.php

@@ -17,13 +17,11 @@ function meters($lat1, $lng1, $lat2, $lng2): float
     return round($earth_radius * $d);
 }
 
-$db=0;
 $connect="";
-require_once('db.php');
 include "config.php";
 $id = $_POST['id'];
 $query = 'SELECT * FROM gps';
-$stm = $db->prepare($query);
+$stm = $connect->prepare($query);
 $stm->execute();
 $row = $stm->fetchAll(PDO::FETCH_ASSOC);
 $lat1=0;

Sources/php_script/script/insert.php

@@ -1,20 +1,26 @@
 <?php
-$connect="";
+$connect="";                                                                    //Else PHP send an error, "connect don't exist", but that work anyway, this is just to remove a fake error
-include "config.php";
+$res=include "config.php";                                                      //$res get the result of the calling of "config.php"
-$id = mysqli_real_escape_string($connect, $_POST['id']);
+if ($res != 1){                                                                 //Check if config.php work
-$latitude = mysqli_real_escape_string($connect, $_POST['latitude']);
+    print (json_encode("Failed to connect to MySQL"));                    //Return a json string, so the dart script can interpret the error
-$longitude = mysqli_real_escape_string($connect, $_POST['longitude']);
+}
-$idMusic = mysqli_real_escape_string($connect, $_POST['idMusic']);
+if (!empty($_POST)) {                                                           //Check if the method POST return something
-
+    $id = mysqli_real_escape_string($connect, $_POST['id']);                    //Get the result of POST method
-$latitude=doubleval($latitude);
+    $latitude = mysqli_real_escape_string($connect, $_POST['latitude']);        //Get the result of POST method
-$longitude=doubleval($longitude);
+    $longitude = mysqli_real_escape_string($connect, $_POST['longitude']);      //Get the result of POST method
+    $idMusic = mysqli_real_escape_string($connect, $_POST['idMusic']);          //Get the result of POST method
+    $latitude = doubleval($latitude);                                           //Convert a string to a double
+    $longitude = doubleval($longitude);                                         //Convert a string to a double
     /*
     $query = "DELETE FROM gps WHERE (SELECT TIMESTAMPDIFF(MINUTE,CURRENT_TIMESTAMP,dateLog))>10;";
     $results = mysqli_query($connect, $query);
     */
-$query = "DELETE FROM gps WHERE id='$id';";
+    $query = "DELETE FROM gps WHERE id='$id';";                                 //Delete the actual line and replace this line with the next lines
-$results = mysqli_query($connect, $query);
+    $results = mysqli_query($connect, $query);                                  //Execute the SQL command
-
-$query = "INSERT INTO gps (id,latitude,longitude,idMusic,dateLog) VALUES('$id','$latitude','$longitude','$idMusic',CURRENT_TIMESTAMP);";
-$results = mysqli_query($connect, $query);
 
+    $query = "INSERT INTO gps (id,latitude,longitude,idMusic,dateLog)           
+    VALUES('$id','$latitude','$longitude','$idMusic',CURRENT_TIMESTAMP);";      //Insert into the database the new data and new information about this user
+    $results = mysqli_query($connect, $query);                                  //Execute the SQL command
+}else{                                                                          //If the method POST return nothing
+    print (json_encode("The POST method failed"));                        //Return a json string, so the dart script can interpret the error
+}