PHP mysqli_connect() Function

In this chapter you will learn:

  1. Definition for PHP mysqli_connect() Function
  2. Syntax for PHP mysqli_connect() Function
  3. Parameter for PHP mysqli_connect() Function
  4. Return for PHP mysqli_connect() Function
  5. Example - opens a new connection to the MySQL server

Definition

The mysqli_connect() function opens a new connection to the MySQL server.

Syntax

mysqli_connect(host,username,password,dbname,port,socket);

Parameter

ParameterIs RequiredDescription
hostOptional.Host name or an IP address
usernameOptional.MySQL username
passwordOptional.MySQL password
dbnameOptional.Default database to be used
portOptional.Port number to attempt to connect to the MySQL server
socketOptional.Socket or named pipe to be used

Return

It returns an object representing the connection to the MySQL server.

Example

The following code opens a new connection to the MySQL server.


<?php//from  j  a  v  a  2 s .  co m
$con=mysqli_connect("localhost","my_user","my_password","my_db");

// Check connection
if (mysqli_connect_errno($con)){
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
?>

Next chapter...

What you will learn in the next chapter:

  1. Definition for PHP mysqli_connect_errno() Function
  2. Syntax for PHP mysqli_connect_errno() Function
  3. Return for PHP mysqli_connect_errno() Function
  4. Example - Get the error code from the last connection error
Home » PHP Tutorial » PHP MySQLi Functions
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