PHP | mysqli_connect() Function

Posted By Bajarangi soft , Posted On 31-12-2020

The mysqli_connect() function in PHP is used to connect you to the database. In the previous version of the connection mysql_connect() was used for connection and then there comes mysqli_connect() where i means improved version of connection and is more secure than mysql_connect().

Syntax:

mysqli_connect ( "host", "username", "password", "database_name" )

Parameters used:

host: It is optional and it specify the host name or IP address. In case of local server localhost is used as a genral keyword to connect local server and run the program.
username: It is optional and it specify mysql username. In local server username is root.
Password: It is optional and it specify mysql password.
database_name: It is database name where operation perform on data. It also optional.

Return values:

It returns an object which represent MySql connection. If connection failed then it return FALSE.

Exampl;e Program: Below is the implementation of mysqli_connect() function.

<?php
    mysqli_connect("localhost", "root", "", "GFG");

    if(mysqli_connect_error())
        echo "Connection Error.";
    else
        echo "Database Connection Successfully.";
?>