Simple database query (mysql_query).
<?php
$con = mysql_connect("localhost","root","lea01ndr");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("test", $con);
$query = "UPDATE contactos SET email='carlos3@bvstv.com' WHERE nombre='Carlos'";
if (mysql_query($query)) {
echo "Ok!";
} else {
echo "No ok!";
}
mysql_close($con);
?>