未捕获的TypeError：无法读取未定义的属性“数据”

Question

I need some help with this code, I have found some similar issues:

Uncaught TypeError: Cannot read property 'value' of undefined

Uncaught TypeError: Cannot read property 'name' of undefined

Ajax call in jQuery - uncaught typeerror cannot read property 'error' of null

but still not working, I'm using jquery (.ajax) to send and recieve data to the server (php), when I use localhost at url in .ajax function, it works fine and receives the data that I need, but when I change the url for the ip of the server it shows: "Uncaught TypeError: Cannot read property "some value" of undefined"

Jquery code:

$(document).on("ready",inicio);

function inicio(){



  /*Change pages events*/
  var buttonscan;
  buttonscan = $('#button_scan');
  buttonscan.on("click",solicitardatos);



}

function solicitardatos(){
           var idscan = "001";
            $.ajax({
                type: 'post',
                //with localhost works fine, this is the ip of my cpu when testing from
                //other device 192.168.0.101
                url: "http://192.168.0.101/server/info.php?jsoncallback=?",
                data: {datos:idscan},
                cache: false,
                success: function(data) {


                $('#button_scan').hide();
                $('#page1').hide();
                $('#page2').show(); 


                $('#pl').html(data[0].pl);                 
                $('#name').html(data[0].name);


            },
            error: function(jqXHR, textStatus, errorThrown) {
                console.log("Error... " + textStatus + "        " + errorThrown);
                alert("Error... " + textStatus + "        " + errorThrown);
            },
            dataType: 'json'
        });

}

And this is the PHP server file (info.php)

<?php 
header('Content-Type: text/javascript; charset=UTF-8');

error_reporting(E_ALL ^ E_NOTICE);
require("conexion.php");


$id = $_POST['datos']; 

/*Here is all the sql statements, and the mysqli query*/

while ($fila = mysqli_fetch_array($peticion)) {

    $resultado[] = array("pl"=>$fila['pl'],"name"=>$fila['name']);  
}



mysqli_close($conexion);
//echo json_encode($resultado);
echo $_GET['jsoncallback'] . '(' . json_encode($resultado) . ');';

?>

So when I use the url setting (localhost) it works, when I change to the server ip (192.168.0.101) it stops working and shows: "Uncaught TypeError: Cannot read property 'pl' of undefined"

, I know that the ip it is working because when I copy 192.168.0.101/server/info.php at my browser it doesn't shows any error

Thanks,

Now I have used an external server, which is in cloud, and it works if I use a constant $id = "001" at info.php, but when I removed that constant and put $id = $_POST['datos'] ,is empty again, so I think there is something wrong when sending the data

Answer 1

Finally I found some part of the issue, when it sends the data, it was sending them as Get, so I changed both .ajax function and info.php

Jquery code

function solicitardatos(){
  $.ajax({
                type: 'get',                
                url: "http://192.168.0.101/server/info.php?jsoncallback=?",
                data: {datos:idscan},
                dataType: "json",
                cache: false,
                   ...

             });
}

Php

 <?php 
    header('Content-Type: text/javascript; charset=UTF-8');

    error_reporting(E_ALL ^ E_NOTICE);
    require("conexion.php");


if (isset ($_GET['datos'])) { 
$id = $_GET['datos']; 

    /*Here is all the sql statements, and the mysqli query*/

    while ($fila = mysqli_fetch_array($peticion)) {

        $resultado[] = array("pl"=>$fila['pl'],"name"=>$fila['name']);  
    }
  } else {}  


    mysqli_close($conexion);

    echo $_GET['jsoncallback'] . '(' . json_encode($resultado) . ');';

    ?>

I'm not sure why it was sending data as get, but with these changes it is now running , Thanks