Doent insert into DB. Why?

Question

Hi,

 

As a new PHP programer I am testing to insert datas into my database. Every things are showing me that the codes are well. For example I test the connection to my database it's fine:

 

I am using PHP 7.3.10 on Windows 10

 

testconnection.php

 

$conn = new mysqli("localhost", "root", "", "login");

if ($conn->connect_error) {

die("ERROR: Unable to connect: " . $conn->connect_error);

}

echo 'Connected to the database.

';

$result = $conn->query("SELECT * FROM usuario");

echo "Number of rows: $result->num_rows";

$result->close();

$conn->close();

?>

//I receive this message:

 

Connected to the database.

Number of rows: 2

Inserttodb.php

 

$link=mysqli_connect("localhost","root","");

mysqli_select_db($link,"phpmysqli");

?>

if(isset($_POST["submit"]))

{

mysqli_query($link,"insert into table1 values('$_POST[t1]','$_POST[t2]')");

}

?>

 

When I insert data ist doesnt show any error. But when I check in phpMysql there is nothing. Ouuuf, I passed days to resolv this. But nothing!!!