gistfile1.php

<?php
$dbhost = 'localhost';
$dbname = 'mydb';
$dbuser = 'root';
$dbpass = '';

try {
	$db = new PDO("mysql:host={$dbhost};dbname={$dbname}",$dbuser,$dbpass);
	$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}

catch(PDOException $e) {
	echo "Connection error: ".$e->getMessage();
}


 $email="";
 $mobile="";
 $username="";
 $msg="";
 
if(isset($_POST['submit']))
{
	$email=$_POST['email'];
	$mobile=$_POST['mobile'];
	$username=$_POST['username'];
	$password=$_POST['password'];
	$password1=$_POST['password1'];

	$query = $db->prepare( "SELECT `email` FROM `users` WHERE `email` = ?" );
	$query->bindValue( 1, $email );
	$query->execute();

	if( $query->rowCount() > 0 ) { # If rows are found for query
		 $msg= '<div><img src="no.png"/>email already taken</div>';
		
	} else {
		$query = $db->prepare( "SELECT `mobile` FROM `users` WHERE `mobile` = ?" );
		$query->bindValue( 1, $mobile );
		$query->execute();

		if( $query->rowCount() > 0 ) { # If rows are found for query
			$msg= '<div><img src="no.png"/>This mobile number already taken</div>';
		} else {
			$query = $db->prepare( "SELECT `username` FROM `users` WHERE `username` = ?" );
			$query->bindValue( 1, $username );
			$query->execute();

			if( $query->rowCount() > 0 ) { # If rows are found for query
				 $msg= '<div><img src="no.png"/>username already taken</div>';
			} else {
				if ($password==$password1) {
					$options = array('cost' => 11);
					$password=password_hash($password, PASSWORD_BCRYPT, $options);
					$statement = $db->prepare("insert into users (email,mobile,username,password) values(?,?,?,?)");
					$statement->execute(array($email,$mobile,$username,$password));
				
					$msg="Registered Successfully";
					header ("location: login-panel.php?feedback=Registered Successfully. Now you can log in");
				} else {
					$msg= '<div><img src="no.png"/>Password doesnt match </div>';
				}
			}
		}
	}
} else

?>

/*----------------------------------------------------------------
I want to use Bcrypt instead of md5. But I cant understand how to implement it.
Please can somebody add Bcrypt code to my coding. */