dbclass.php
class dbclass {
    var $CONN;
    function dbclass() { //constructor
        $conn = mysqli_connect(DB_HOST,DB_USER,DB_PWD,DB_NAME)  or die('Could not connect: ' . mysqli_connect_error());

        if(!$conn)
            {   $this->error("Connection attempt failed");      }
        if(!mysqli_select_db($conn,DB_NAME))
            {   $this->error("Database Selection failed");      }
        $this->CONN = $conn;
        return true;
    }


    //_____________close connection____________//
    function close(){
        $conn = mysqli_connect(DB_HOST,DB_USER,DB_PWD,DB_NAME)  or die('Could not connect: ' . mysqli_connect_error());

        $conn = $this->CONN ;
        $close = mysql_close($conn);
        if(!$close){
          $this->error("Close Connection Failed");  }
        return true;
    }
    //______________catch error__________________//
    function error($text) {
        $conn = mysqli_connect(DB_HOST,DB_USER,DB_PWD,DB_NAME)  or die('Could not connect: ' . mysqli_connect_error());
        var_dump($conn);
        $no = mysqli_errno($conn);
        $msg = mysqli_error($conn);
        echo "<hr><font face=verdana size=2>";
        echo "<b>Custom Message :</b> $text<br><br>";
        echo "<b>Error Number :</b> $no<br><br>";
        //echo "<b>Error Message    :</b> $msg<br><br>";
        echo "<hr></font>";
        exit;
    }}

<?php
$database='srijanip_bhargavproperty';
$user='bhargav';
$pass='******';
//$host='localhost';
$host='*****.*****.in';

define("DB_HOST", "$host");
define("DB_NAME", "$database");
define("DB_USER", "$user");
define("DB_PWD", "$pass");
 if(file_exists(MAIN_PATH.'_class/dbclass.php')){

    include_once(MAIN_PATH.'_class/dbclass.php');
    //echo "include db class success";
    $obj = new dbclass();
}?>