Get the last error description for the most recent function call, if any in PHP

/* w w w.j  a va2 s . c  o  m*/
<?php
    $con=mysqli_connect("localhost","root","","test");
    // Check connection
    if (mysqli_connect_errno()){
        echo "Failed to connect to MySQL: " . mysqli_connect_error();
    }

    // Perform a query, check for error
    if (!mysqli_query($con,"INSERT INTO employee(Name) VALUES ('XML')")){
        echo("Error description: " . mysqli_error($con));
    }

    mysqli_close($con);
?>