Uncaught SyntaxError: Unexpected token < in JSON at position 0 at JSON.parse (<anonymous>)

Question

I want to pass an array from PHP file to JavaScript and store in JavaScript array. Here's the JavaScript code:

xmlhttp = new XMLHttpRequest();
            xmlhttp.onreadystatechange=function(){
             if (xmlhttp.readyState==4 && xmlhttp.status==200)
             {
                    nameData = JSON.parse(xmlhttp.responseText); 
                    console.log(xmlhttp.responseText);
                }
            }
            xmlhttp.readyState=4;
            xmlhttp.open("GET","mapPHPname.php?Zip="+zipcode,true);
            xmlhttp.send();

PHP file:

<?php
$zip=isset($_GET['Zip']);
include 'dbconnect.php';
$sql="Select `name` from doctor where `zip` LIKE $zip";
$result = mysql_query( $sql, $conn );
$num_rows = mysql_num_rows($result);
array(name);
if($num_rows>=1)
{
    $count=0;
    while($res_array = mysql_fetch_assoc($result))
    {
        $name[$count]=$res_array['name'];
    }
}
else
{
    $name[0]="kashyap"; 
}
echo json_encode($name);
?>

I am getting this error:

Uncaught SyntaxError: Unexpected token < in JSON at position 0 at JSON.parse (< anonymous >)

Answer 1

1- You don't declare an array in this way: array(name)

Try instead: $name = array() or $name = [] .

2- And quote your include include 'dbconnect.php';

3- Correct access to variable count , at $name[count]=$res_array['name']; , count should be $count .

And you're not actually looping it. You should make $count++ after saving to the $name array.