PHP | mysqli_close() Function
MySQLi Procedural procedure:
To close the connection in mysql database we use php function mysqli_close() which disconnect from database. It require a parameter which is a connection returned by the mysql_connect function.
Syntax:
mysqli_close(conn);
If the parameter is not specified in mysqli_close() function, then the last opened database is closed. This function returns true if it closes the connection successfully otherwise it returns false.
Below program illustrate the mysqli_close() function
<?php
$servername = "localhost" ;
$username = "username" ;
$password = "password" ;
$conn = mysqli_connect( $servername , $username , $password );
if (! $conn ) {
die ( "Connection failed: " . mysqli_connect_error());
}
$sql = "CREATE DATABASE newDB" ;
if (mysqli_query( $conn , $sql )) {
echo "Database created successfully with the name newDB" ;
} else {
echo "Error creating database: " . mysqli_error( $conn );
}
mysqli_close( $conn );
?>
|
MySQLi Object-oriented procedure::
To close the connection in mysql database we use php function conn->close() which disconnect from database.
Syntax:
conn->close();
Program: To illustrate the closing of connection in object-oriented procedure.
<?php
$servername = "localhost" ;
$username = "username" ;
$password = "password" ;
$dbname = "newDB" ;
$conn = new mysqli( $servername , $username , $password , $dbname );
if ( $conn ->connect_error) {
die ( "Connection failed: " . $conn ->connect_error);
}
$conn ->close();
?>
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Using PDO procedure:
To close the connection in MySQL database in PDO procedure we set the connection name to null which disconnect from the database.
Syntax:
conn=null;
Program: to illustrate the closing of connection in PDO procedure.
<?php
$servername = "localhost" ;
$username = "username" ;
$password = "password" ;
try {
$conn = new PDO( "mysql:host=$servername;dbname=newDB" ,
$username , $password );
$conn ->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sql = "CREATE DATABASE newDB" ;
$conn -> exec ( $sql );
echo "Database created successfully with the name newDB" ;
}
catch (PDOException $e )
{
echo $sql . "
" . $e ->getMessage();
}
$conn = null;
?>
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References: http://php.net/manual/en/mysqli.close.php
Last Updated :
13 May, 2019
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