Send GET in Ajax call and PHP script - php

Question

I want to POST data from form. It works fine.
In the other functionality i want to get data from database.
I don't know where is mistake. I suspect that AJAX call is fine.
My PHP code:
<?php
$uuid = $_POST['uuid'];
$minor = $_POST['minor'];
$mayor = $_POST['mayor'];
$lokalizacja = $_POST['lokalizacja'];
$servername = "";
$username = "";
$password = "";
$dbname = "";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
} else{
echo "Polaczono";
}
$sql = "INSERT INTO beacons (uuid, major, minor, lokalizacja)
VALUES ('$uuid', '$minor', '$mayor', '$lokalizacja')";
if ($conn->query($sql) === TRUE) {
echo "Dane dodano prawidłowo";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}
$sqlget = "SELECT uuid, major, minor, lokalizacja FROM beacons";
$result = $conn->query($sqlget);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
echo json_encode(array("value" => "UUID: " . $row["uuid"]));
}
} else {
echo "Brak rekordów w bazie";
}
$conn->close();
?>
AJAX call:
$('#admin').submit(function(e){
e.preventDefault();
if( ($("input[name=uuid]").val().length) > 40 || ($("input[name=minor]").val().length) > 5 || ($("input[name=mayor]").val().length) > 5 || ($("input[name=lokalizacja]").val().length) > 20){
$(".error-pola").show();
} else{
$.post('administrator-connect.php', $(this).serialize() )
.done(function(){
$(".success-wyslanie").show();
})
.fail(function(){
$(".error-wyslanie").show();
});
}
});
$(document).ready(function() {
$.ajax({
type: "GET",
url: 'administrator-connect.php',
dataType: 'json',
success: function(data)
{
alert("fsdfsd"+ data);
},
error: function(){
alert("not");
}
});
});
I am using:
echo json_encode(array("UUID" => $row["uuid"]));
and in ajax:
var jqxhr = $.get( "administrator-get.php", function(data) {
var jsonx = JSON.parse(JSON.stringify(data));
$( "#data-listing" ).html(jsonx);
});
But I get response:
{"UUID":"B9407F30-F5F8-466E-AFF9-25556B57FE6D"}
How to get only string ?

Answer 1

If you write this
dataType: 'json',
It expect for JSON value not string be sure to return only JSON.
You returns string value not JSON.
With like this code
echo "Polaczono";
Any echo would be the return value for ajax
At last you should return only one value like this.
echo json_encode($result);//an array result
You can check by string return. By removing dataType