function property_update_shortcode() {

    ob_start(); ?>

        <form method="post">

            <input name="property_value" />

            <input type="hidden" name="action" value="update_property">
            <input type="submit">

        </form>

    <?php

    return ob_get_clean();

}

add_shortcode( 'property_update', 'property_update_shortcode' );


function save_property_data() {

    if( isset( $_POST['action'] ) && $_POST['action'] == 'property_update' ) {

        global $post;

        update_post_meta( $post->ID, 'property_value', $_POST['property_value'] );

        wp_fusion()->user->push_user_meta( get_current_user_id(), array( 'property_value' => $_POST['property_value'] ) );

    }


}

add_action( 'init', 'save_property_data' );