note 48599 added to language.control-structures

I put together this in order to mask my links, passing the query from another page in a link (go.php?id=1) but everytime, it goes directly to the last value.. even if I pass id=1 it takes me to (in this example) to google... Any light?... please!!! <?php if ($id = "1"){$link = "http://altavista.com";} if ($id = "2"){$link = "http://yahoo.com";} if ($id = "3"){$link = "http://google.com";} header("Location: $link"); exit(); ?> ---- Manual Page -- http://www.php.net/manual/en/language.control-structures.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+48599 Delete -- http://master.php.net/manage/user-notes.php?action=delete+48599&report=yes Reason: bad code -- http://master.php.net/manage/user-notes.php?action=delete+48599&report=yes&reason=bad+code Reason: spam -- http://master.php.net/manage/user-notes.php?action=delete+48599&report=yes&reason=spam Reason: useless example -- http://master.php.net/manage/user-notes.php?action=delete+48599&report=yes&reason=useless+example Reason: contains commercial links -- http://master.php.net/manage/user-notes.php?action=delete+48599&report=yes&reason=contains+commercial+links Reason: useless note -- http://master.php.net/manage/user-notes.php?action=delete+48599&report=yes&reason=useless+note Reject -- http://master.php.net/manage/user-notes.php?action=reject+48599&report=yes Search -- http://master.php.net/manage/user-notes.php