update image profile with jquery - php

Question

Well what I want to do is to update image profile picture of the user with jquery from database but it does not pull out the source of image from db.please tell me where I'm wrong.
here is my code
include('../inc/config.inc.php');
$userSession = #$_SESSION["utente"];
$verificaPic = mysqli_query($db,"SELECT pic_profilo FROM users WHERE username='$userSession'");
$row_pic = mysqli_fetch_array($verificaPic, MYSQLI_ASSOC);
$pic = $row_pic["pic_profilo"];
if($row_pic["pic_profilo"] !== ""){
echo "<img src='$pic' class='img-polaroid'>";
}else{
echo '<img src="img/defaultuser.png" class="img-polaroid">';
}
and this is my jquery call
JQ(function($) {
setInterval(function() {
$.get("/ajax/DataProfilo.php",
function(data) {
$("#picprofilo").html(data); // 2pm
});
}, 100);//1000-1 sec
});

Answer 1

If I understand you correctly, then the code below is the DataProfilo.php script, correct? Please make the few minor changes in this code and show me what the result of the AJAX call is from the console. I also need to see the original HTML markup showing what #picprofilo is.
PHP
include('../inc/config.inc.php');
$userSession = #$_SESSION["utente"];
$q = "SELECT pic_profilo FROM users WHERE username='" . $userSession . "'"; // **add this line of code**
echo $q."\n";
$verificaPic = mysqli_query($db,$q); // **change this line of code!!**
$row_pic = mysqli_fetch_assoc($verificaPic);
$pic = $row_pic["pic_profilo"];
if (!empty($row_pic["pic_profilo"])) {
echo "<img src='$pic' class='img-polaroid'>";
} else {
echo "<img src='img/defaultuser.png' class='img-polaroid'>";
}
jQuery
JQ(function($) {
setInterval(function() {
$.get("/ajax/DataProfilo.php",
function(data) {
$("#picprofilo").html(data);
console.log(data);
});
}, 100);//1000-1 sec
});