Error in php script when hosted in the remote server only - php

Question

I have an android app with php backend, the problem is one of the php scripts works perfectly on the local server while when online it does not and produce the following error:
Parse error: syntax error, unexpected '"', expecting T_STRING or T_VARIABLE or T_NUM_STRING in /home/malblbic/public_html/webservice/profile.php on line 23
Here is my php code.
<?php
/*
Our "config.inc.php" file connects to database every time we include or require
it within a php script. Since we want this script to add a new user to our db,
we will be talking with our database, and therefore,
let's require the connection to happen:
*/
require("config.inc.php");
//initial query
$username = $_POST['username'];
$query = "Select * FROM users;
//execute query
try {
$stmt = $db->prepare($query);
$result = $stmt->execute();
}
catch (PDOException $ex) {
$response[‘success’] = 0;
$response["message"] = "Database Error!";
die(json_encode($response));
}
// Finally, we can retrieve all of the found rows into an array using fetchAll
$rows = $stmt->fetchAll();
if ($rows) {
$response["success"] = 1;
$response["message"] = "User Available!";
$response["posts"] = array();
foreach ($rows as $row) {
$post = array();
$post["picture"] = $row["picture"];
$post["username"] = $row["username"];
$post["points"] = $row["points"];
//update our repsonse JSON data
array_push($response["posts"], $post);
}
// echoing JSON response
echo json_encode($response);
} else {
$response["success"] = 0;
$response["message"] = "No Users Available!";
die(json_encode($response));
}
?>

Answer 1

Change backticks to regular quotes
$response[‘success’] = 0;
To
$response['success'] = 0;