Php 7 and MySql error when I try to select record from table [closed]

Hi have a strange problem with PHP and MySql connection.
I m using PHP 7.1.2 and MySql v5.5.64

Now I write the following code:

<?php
$mysqli = new mysqli("localhost", "usr_gest", "qo2f", "db_gest");
if ($mysqli->connect_errno) {
echo "Connessione a MySQL fallita: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error;
}
echo $mysqli->host_info . "n";

$mysqli = new mysqli("localhost", "usr_gest", "qo2f", "db_gest", 3306);
if ($mysqli->connect_errno) {
echo "Connessione a MySQL2 fallita: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error;
}
echo $mysqli->host_info . "n";

$sql = "SELECT * FROM login";
if ($mysqli->query($sql) === TRUE) { 
        echo "success";
} else {
        echo "Error creating table: " . $mysqli->error; 
}
$sql = "SELECT * FROM login;";
if ($mysqli->query($sql) === TRUE) { 
        echo "success";
} else {
        echo "Error creating table: " . $mysqli->error; 
}
$mysqli->close();
?>

If I try to open the page with this code I can see this:

Localhost via UNIX socket 
Localhost via UNIX socket 
Error select table1: 
Error select table2:

How can I fixed this error?

In my mysql database there is “login” table