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<?php
$con = mysqli_connect("localhost", "my_user", "my_password", "my_db");

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

$charset = mysqli_character_set_name($con);
echo "Default character set is: " . $charset;

mysqli_close($con);
?>