PHP | mysqli_close() Function

PHP mysqli_close() Function


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

The PHP mysqli_close() function accepts a MYSQL function object (formerly 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 function was first introduced in PHP version 5 and it works in all of the later versions.

Example1

The following example demonstrates the usage of the 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 PHP 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 is another example of the built-in 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 are going to be studying about the PHP mysqli_commit() Function.

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