How to use mysqli in PHP in this code - php

Question

Currently My code is this to connect my database.
<?php
/**
* A class file to connect to database
*/
class DB_CONNECT {
// constructor
function __construct() {
// connecting to database
$this->connect();
}
// destructor
function __destruct() {
// closing db connection
$this->close();
}
/**
* Function to connect with database
*/
function connect() {
// import database connection variables
require_once __DIR__ . '/db_config.php';
// Connecting to mysql database
$con = mysql_connect(DB_SERVER, DB_USER, DB_PASSWORD) or die(mysql_error());
// Selecing database
$db = mysql_select_db(DB_DATABASE) or die(mysql_error()) or die(mysql_error());
// returing connection cursor
return $con;
}
/**
* Function to close db connection
*/
function close() {
// closing db connection
mysql_close();
}
}
?>
db_config.php is
<?php
define('DB_USER', "root"); // db user
define('DB_PASSWORD', ""); // db password (mention your db password here)
define('DB_DATABASE', "leading10"); // database name
define('DB_SERVER', "localhost"); // db server
?>
on using the above code somewhere it shows an warning to use mysqli or PDO
I followed many stackoverflow questions but still I was not able to do it successfully .
One of the methods I know is to use # symbol before mysql_connect() but it may not work in future.
Any Help Appreciated

Answer 1

As other guys already wrote you should use mysqli_* functions. But this is not the problem in your case.
The problem is you assign the connection to $con which is a local variable and therefore - once connect() quits - the value gets lost.
This code works:
class DB_CONNECT
{
private $connection;
private $database;
function __construct() {
$this->connect();
}
function __destruct() {
$this->close();
}
function connect() {
$this->connection = mysqli_connect( DB_SERVER, DB_USER, DB_PASSWORD ) or die(mysql_error());
$this->database = mysqli_select_db( DB_DATABASE ) or die(mysql_error());
}
function close() {
mysqli_close( $this->connection );
}
}
Note:
In your code you have twice or die(...) in a line.

Answer 2

Use this to turn off error reporting
write it on the top of the page
error_reporting(E_ERROR | E_WARNING | E_PARSE);
here is the link for more info
http://www.w3schools.com/php/func_error_reporting.asp

Answer 3

It is not working because you are using mysql, which is depreciated, change all mysql to mysqli. This is an edited version of your code.
<?php
/**
* A class file to connect to database
*/
class DB_CONNECT {
// constructor
function __construct() {
// connecting to database
$this->connect();
}
// destructor
function __destruct() {
// closing db connection
$this->close();
}
/**
* Function to connect with database
*/
function connect() {
// import database connection variables
require_once __DIR__ . '/db_config.php';
// Connecting to mysql database
$con = mysqli_connect(DB_SERVER, DB_USER, DB_PASSWORD) or die(mysqli_error());
// Selecing database
$db = mysqli_select_db(DB_DATABASE) or die(mysqli_error());
// returing connection cursor
return $con;
}
/**
* Function to close db connection
*/
function close() {
// closing db connection
mysqli_close();
}
}
?>