angular 2 post to a database works on firefox but not on chrome

so this drive me insane :)
the same code work on firefox but not on chrome.

i test angular 2 "ajax calls", this time sending data to insert into the database, and send back the inserted item.

so this is in the service:
  addUser(){
    var theparams = JSON.stringify({
      name: "fabian",
      address: "dizingoff 99, NY",
      lat: 33.060143,
      lng: 39.770557
    });
    var params = 'user=' + theparams;
    var headers = new Headers();
    headers.append('Content-type', 'application/x-www-form-urlencoded');

    return this._http.post('http://localhost:80/ang2router/public/addContact.php', params,{
      headers: headers
    })
    .map(res => res.json());

  }

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this is hard coded for testing obviously.
then i call it on a button click:
      this._httpsService.addUser()
      .subscribe(
        data => this.postData = data,
        error => alert(error),
        () => console.log("Finished")
      );

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then the php file that insert it into the database and get it back:
$value = json_decode($_POST['user']);
header("Access-Control-Allow-Origin: *");
header('Access-Control-Allow-Headers: X-Requested-With');
header('Content-Type: application/json');
//var_dump($value->name);

        $db_name  = 'mydb';
        $hostname = 'localhost';
        $username = 'myusername';
        $password = 'mypass';

        // connect to the database
       $dbh = new PDO("mysql:host=$hostname;dbname=$db_name", $username, $password);



    // a query get all the records from the users table
    $sql = 'INSERT INTO markers ( name, address,lat, lng ) 
        VALUES ( "' . $value->name .'" , "'.$value->address.'", '.$value->lat.' , '.$value->lng.' );';

    
    $stmt = $dbh->prepare( $sql );

   
    $check = $stmt->execute();

    $last_id = $dbh->lastInsertId();

    $sql2 = "SELECT * FROM markers WHERE id=$last_id ";

   
    $stmt = $dbh->prepare( $sql2 );

    
    $stmt->execute();

    // fetch the results into an array
    $result = $stmt->fetchAll( PDO::FETCH_ASSOC );
                                                        
    echo json_encode($result);

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in firefox all goes well, the data is in the database and i get the last inserted id back.
but on chrome not. i attach what i get on chrome.

best regards
Screenshot--65-.png
Screenshot--66-.png
LVL 1
derridaAsked:
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Dave BaldwinFixer of ProblemsCommented:
Chrome doesn't like 'localhost' for a number of functions including cookies.  Try changing your links to the IP address of the machine and see if that works.  I only use 'localhost' when it is actually required.  I normally use the machine IP address because then the pages are accessible from other machines on the network.
derridaAuthor Commented:
hi
no change. and add to it that if i don't do a switch statement it works. but once i use that post veriable, it works of FF but not on chrome.
Dave BaldwinFixer of ProblemsCommented:
What 'switch statement'?
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derridaAuthor Commented:
sorry, that was about another issue i have :) forget about the switch statement.
derridaAuthor Commented:
so when i var_dump my $_POST array:
in chrome: array(0) {
}
empty.
in firefox:
array(1) {
  ["user"]=>
  string(82) "{"name":"Moses","address":"dizingoff 29, NY","lat":23.060143,"lng":29.770557}"
}
Dave BaldwinFixer of ProblemsCommented:
For test purposes, I would create an HTML form page and see what you get when you submit that.  Like below... note that I put quotes around the "lat / lon" values to get it to work.  It works the same in both Firefox and Chrome.

ChromePOSTtest.html
<!DOCTYPE html>
<html>
<head>
<title>Chrome POST test form</title>
</head>
<body>
<h1>Chrome POST test form</h1>
<form action="addContact.php" method="post">
<input type="text" name="user" value='{"name":"Moses","address":"dizingoff 29, NY","lat":"23.060143","lng":"29.770557"}' />
<input type="submit" name="submit" value="submit" />
</form>
</body>
</html>

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addContact.php
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
<title>addContact.php</title>
</head>
<body>
<?php 
$value = json_decode($_POST['user']);
header("Access-Control-Allow-Origin: *");
header('Access-Control-Allow-Headers: X-Requested-With');
header('Content-Type: application/json');
var_dump($_POST['user']);
var_dump($value);
?>
</body>
</html>

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Dave BaldwinFixer of ProblemsCommented:
Let's try this again, I might have found something.  I added the 'true' option to 'json_decode' and it seems to work without the quotes.  It now shows the lat/lon as floats in both browsers.

ChromePOSTtest1.html
<!DOCTYPE html>

<html>
<head>
<title>Chrome POST test form</title>
</head>
<body>
<h1>Chrome POST test1 form</h1>
<form action="addContact.php" method="post">
<input type="text" name="user" value='{"name":"Moses","address":"dizingoff 29, NY","lat":23.060143,"lng":29.770557}' />
<input type="submit" name="submit" value="submit" />
</form>
</body>
</html>

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addContact.php
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
<title>addContact.php</title>
</head>
<body>
<?php 
$value = json_decode($_POST['user'], true);
header("Access-Control-Allow-Origin: *");
header('Access-Control-Allow-Headers: X-Requested-With');
header('Content-Type: application/json');
var_dump($_POST['user']);
var_dump($value);
?>
</body>
</html>

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From http://php.net/manual/en/function.json-decode.php ...
assoc

    When TRUE, returned objects will be converted into associative arrays.
derridaAuthor Commented:
well yes, it does work, in that "regular" way ( by the way, with quotes or without the added quotes).
But once I do that in the angular 2 way, works in FF but not in chrome. notice that i'm hard coding the values, since I just want to learn to pass the data in the angular 2 way.

I have no idea why it is passed in FF but not in chrome.
Dave BaldwinFixer of ProblemsCommented:
Are you going to try adding 'true' to the json_decode statement?  I'm not going to try to duplicate your angular code because most of is not posted and I don't have your database.  For testing I always simplify things to something that works and work from there to build something more complicated.
derridaAuthor Commented:
oh i have tried it with the true. same thing: works on FF not in chrome.
Dave BaldwinFixer of ProblemsCommented:
Then you need to make a test version of your code that is as simple as possible so you can figure out what is and isn't working.  Maybe an 'angular' version of my demo programs.  After all Chrome works, Firefox works, PHP works.  It's just the combination with your code that isn't working.
derridaAuthor Commented:
so fixed it. and i put it here for anyone else who will encounter the issue.

the problem is that the post array in php expect a key value pair. and that's not what i sent.
so you either send a key value pairs, or if you want to keep the json format, in your php, since there is no key, do:
$theobject = json_decode(key($_POST));
echo $theobject->action;

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now it works on chrome and firefox.
Dave BaldwinFixer of ProblemsCommented:
Interesting.  So how did you rewrite the addUser() function?
derridaAuthor Commented:
not a lot to rewrite it:
    let theparams = JSON.stringify({
      name: "Moses",
      address: "dizingoff 29, NY",
      lat: 23.060143,
      lng: 29.770557
    });
    let headers = new Headers();
    headers.append('Content-Type','application/x-www-form-urlencoded;charset=utf-8');

    return this._http.post(
      'http://localhost:80/ang2router/public/addUser2.php',
      theparams,
      {headers: headers}
    )
    .map(res => res.json());

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i'm not sure i can give myself the points :)

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Dave BaldwinFixer of ProblemsCommented:
No, but you can give yourself credit.  Although if you feel that I helped you, you can give me some credit.
derridaAuthor Commented:
icame with the answer
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