php - Access denied for user ''@'localhost' (using password: NO) -

i have ubuntu 14.04 lts. set apache, phpmyadmin , mysql. can access databases through localhost/phpmyadmin using set password , root username. have put link inside /etc/apache2/sites-enabled links original .conf file of website located in /etc/apache2/sites-available. , has these lines (mypage.conf

php_value mysql.default.user    root php_value mysql.default.password    mypass php_value mysql.default.host    localhost 

when try connect database using in index.php works prettily:

mysql_connect('localhost', 'root', 'mypass') or die(mysql_error()); 

but when try connect database using below:

mysql_connect(ini_get("mysql.default.host"), ini_get("mysql.default.user"), ini_get("mysql.default.password")) or die(mysql_error()); 

in return posts error message page , doesn't execute rest of code:

access denied user ''@'localhost' (using password: no) 

as can understand this, gets default values ''. must doing wrong .conf file. can me it?

as stated @vanitas, changed connection style pdo instead of mysql. here's

connection.php

<?php     define('db_host', 'localhost');     define('db_name', 'mydb');     define('db_user', 'usr');     define('db_pass', 'pss');      try{         $db = new pdo('mysql:host='.db_host.'; dbname='.db_name, db_user, db_pass);     }catch(pdoexception $exeption){         echo $exeption->getmessage(). '<br/>';         die();     } ?> 

and retrive using

require_once('../../0n/connection.php'); 

it's outside of web directory. so, it's safe. suppose. , it's working prettily.