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# mysqli_connect

(PHP 5)

mysqli_connect

(no version information, might be only in CVS)

mysqli() -- Open a new connection to the MySQL server

## Description

Procedural style

object mysqli_connect ( [string host [, string username [, string passwd [, string dbname [, int port [, string socket]]]]]])

Object oriented style (constructor):

class mysqli {
__construct ( [string host [, string username [, string passwd [, string dbname [, int port [, string socket]]]]]])
}

The mysqli_connect() function attempts to open a connection to the MySQL Server running on `host` which can be either a host name or an IP address. Passing the `NULL` value or the string "localhost" to this parameter, the local host is assumed. When possible, pipes will be used instead of the TCP/IP protocol. If successful, the mysqli_connect() will return an object representing the connection to the database, or `FALSE` on failure.

The `username` and `password` parameters specify the username and password under which to connect to the MySQL server. If the password is not provided (the `NULL` value is passed), the MySQL server will attempt to authenticate the user against those user records which have no password only. This allows one username to be used with different permissions (depending on if a password as provided or not).

The `dbname` parameter if provided will specify the default database to be used when performing queries.

The `port` and `socket` parameters are used in conjunction with the `host` parameter to further control how to connect to the database server. The `port` parameter specifies the port number to attempt to connect to the MySQL server on, while the `socket` parameter specifies the socket or named pipe that should be used.

> 참고: Specifying the `socket` parameter will not explicitly determine the type of connection to be used when connecting to the MySQL server. How the connection is made to the MySQL database is determined by the `host` parameter.

## Return values

Returns a object which represents the connection to a MySQL Server or `FALSE` if the connection failed.

## Example

예 1. Object oriented style

`<?php $mysqli = new mysqli("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } printf("Host information: %s\n", $mysqli->host_info); /* close connection */ $mysqli->close(); ?>`

예 2. Procedural style

`<?php $link = mysqli_connect("localhost", "my_user", "my_password", "world"); /* check connection */ if (!$link) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } printf("Host information: %s\n", mysqli_get_host_info($link)); /* close connection */ mysqli_close($link); ?>`

The above examples would produce the following output:

    Host information: Localhost via UNIX socket

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mysqli_connect_error | 위로 | mysqli_data_seek