这是在页面中添加表单的简单代码：

add_shortcode( \'myform\', \'add_myform\' );
function add_myform( $atts ) {
    if ( isset( $_POST[\'myname\'] ) ) {
        $myname  = $_POST[\'myname\'];
        update_option( \'myname\', $myname );
    } else {
        $myname = get_option( \'myname\' );
    }

    $myform = "<form method=\'post\' action=\'\'>";
    $myform .= "<input type=\'text\' name=\'myname\' value=\'" . $myname . "\'>";
    $myform .= "<input type=\'submit\' value=\'Submit\'>";
    $myform .= "</form>";
    return $myform;
}