Unable to make connection with database from cronjob - php

Question

I have a cron.php file on my server which makes connection with the database and do some function. When I execute this file using browser, it runs perfectly. But when it executes from cron, it gives following error while making database connection:
ERROR: SQLSTATE[28000] [1045] Access denied for user 'USER_NAME'#'localhost' (using password: YES)<br />
I searched a lot but no clue what to do. Any ideas?
EDIT: Basically, this is my cron.php:
<?php
require_once('phpInclude/db_connection.php');
error_reporting(1);
$sql_qry = "select email, apn_id, reg_id, token from users where verify = 'n' and DATEDIFF(NOW(),created_on) = 3";
$res=$con->query($sql_qry);
?>
My db_connection.php:
<?php
require_once('config.php');
try {
$dsn = 'mysql:host='.$DB_HOST.';dbname='.$DB_DATABASE;
$con = new PDO($dsn, $DB_USER, $DB_PASSWORD);
$con->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(PDOException $e) {
echo 'ERROR: ' . $e->getMessage();
}
$DB_HOST = LOCALHOST;
$DB_DATABASE = DB_NAME;
$DB_USER = USER_NAME;
$DB_PASSWORD = USER_PASS;
?>
My config.php:
define('LOCALHOST','localhost');
define('USER_NAME','xxxxxxxxxxx');
define('USER_PASS','xxxxxxxxxx');
define('DB_NAME','xxxxxxxxxx');
define("UPLOAD_PATH","xxxxxxxxxxxx");
define("BASE_PATH","xxxxxxxxxxxxxx");

Answer 1

Problem solved. I was having a localhost check in my config.php file. At first, I made the webservices at localhost using wamp, so the config was of localhost. Later, I moved the project on my server. And I changed the config by adding:
if(server="http://myserver.com")
//take server config
else
//take localhost config
And cron service picked the config inside else clause.

Answer 2

CRONs typically run from the CLI, so it may not be accessing this file from the webroot like when you browse to cron.php. Try changing the require to an absolute path:
require_once __DIR__ . 'phpInclude/db_connection.php';