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

/*w  w  w  .  j a va 2  s.co 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($con,"INSERT INTO employee(Name) VALUES ('XML')")){
        echo("Errorcode: " . mysqli_errno($con));
     }

     mysqli_close($con);
?>