PHP mysqli_close() Function

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Definition and Usage

The mysqli_close() function accepts a MySQL function object (previously opened) as a parameter, and closes it.

You cannot close persistent connections using this function.

Syntax

mysqli_close($con);

Parameters

Return Values

The PHP mysqli_close() function returns a boolean value which is true on success and false on failure.

PHP Version

This function was first introduced in PHP Version 5 and works works in all the later versions.

Example

Following example demonstrates the usage of the mysqli_close() function (in procedural style) −

<?php
   $host = "localhost";
   $username  = "root";
   $passwd = "password";
   $dbname = "mydb";

   //Creating a connection
   $con = mysqli_connect($host, $username, $passwd, $dbname);

   //Closing the connection
   $res = mysqli_close($con);

   if($res){
      print("Connection Closed");
   }else{
      print("There is an issue while closing the connection");
   }
?>

This will produce following result −

Connection Closed

Example

In object oriented style the syntax of this function is $con->close(); Following is the example of this function in object oriented style $minus;

<?php
   $host = "localhost";
   $username  = "root";
   $passwd = "password";
   $dbname = "mydb";

   //Creating a connection
   $con = new mysqli($host, $username, $passwd, $dbname);

   //Closing the connection
   $res = $con -> close();

   if($res){
      print("Connection Closed");
   }else{
      print("There is an issue while closing the connection");
   }
?>

This will produce following result −

Connection Closed

Example

This is another example of the mysqli_close() function −

<?php
   //Creating a connection
   $con = @mysqli_connect("localhost");
   $res = @mysqli_close($con);

   if($res){
      print("Connection closed Successfully");
   }else{
      print("Sorry there is an issue could close the connection ");
   }
?>

This will produce following result −

Sorry there is an issue could close the connection

Example

<?php
   $connection = @mysqli_connect("tutorailspoint.com", "use", "pass", "my_db");
   
   if (mysqli_connect_errno($connection)){
      echo "Failed to connect to MySQL: ".mysqli_connect_error();
   }else{
	   mysqli_close($connection);
   }   
?>

This will produce following result −

Failed to connect to MySQL: No connection could be made because the target machine actively refused it.