PHP | mysqli_close() Function

PHP mysqli_close() Function


Hello folks! welcome back to another edition of our tutorial on PHP. In this tutorial guide, we are going to be discussing about the PHP mysqli_close() Function.

The built-in PHP 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

Following below is the syntax to use this function -

mysqli_close($con);


Parameter Details

Sr.NoParameter & Description
1

con(Mandatory)

This is an object representing a connection to MySQL Server that you need to close.


Return Value

This built-in PHP function returns TRUE on success and FALSE on failure.

PHP Version

This built-in PHP function was first introduced in PHP version 5 and works in all the later versions.

Example1

The following below is an example which demonstrates the usage of PHP mysqli_close() function (in a 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");
   }
?>

Output

When the above code is executed, it will produce the following result -

Connection Closed

Example2

In an object oriented style the syntax of this function is $con->close(), Following is the usage of this PHP function in an 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");
   }
?>

Output

When the above code is executed, it will produce the following result -

Connection Closed

Example3

This another example of the PHP 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 ");
   }
?>

Output

When the above code is executed, it will produce the following result -

Sorry there is an issue could close the connection

Example4

Try the following example below -

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

Output

When the above code is executed, it will produce the following result -

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


Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial, we will discuss about the PHP mysqli_commit() Function.

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