PHP mysqli connect() Function
Example - Object Oriented style
Open a new connection to the MySQL server:
<?php
$mysqli = new mysqli("localhost","my_user","my_password","my_db");
// Check connection
if ($mysqli -> connect_errno) {
echo "Failed to connect to MySQL: " . $mysqli -> connect_error;
exit();
}
?>
Look at example of procedural style at the bottom.
Definition and Usage
The connect() / mysqli_connect() function opens a new connection to the MySQL server.
Syntax
Object oriented style:
$mysqli -> new mysqli(host, username, password, dbname, port, socket)
Procedural style:
mysqli_connect(host, username, password, dbname, port, socket)
Parameter Values
| Parameter | Description |
|---|---|
| host | Optional. Specifies a host name or an IP address |
| username | Optional. Specifies the MySQL username |
| password | Optional. Specifies the MySQL password |
| dbname | Optional. Specifies the default database to be used |
| port | Optional. Specifies the port number to attempt to connect to the MySQL server |
| socket | Optional. Specifies the socket or named pipe to be used |
Technical Details
| Return Value: | Returns an object representing the connection to the MySQL server |
|---|---|
| PHP Version: | 5+ |
Example - Procedural style
Open a new connection to the MySQL server:
<?php
$con = mysqli_connect("localhost","my_user","my_password","my_db");
// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
exit();
}
?>
❮ PHP MySQLi Reference
