Exit Meta box

<?php
/*
Plugin Name: TT Metabox Employees
Plugin URI:
Description: Metabox Nuorten Exitin henkilöstön lisäämiseksi etusivulle .
Version:     1.0
Author:      Topi Tiikkainen
Author URI:
License:     GPLv2
*/


function tt_henkilosto(){


    $post_id = $_GET['post'] ? $_GET['post'] : $_POST['post_ID'];
    wp_nonce_field('tt-tallennus', 'tt_nonce_kentta');
    if ($post_id == '12' && is_admin()) {
        add_meta_box("henkilo1", "Henkilo 1", "luo_h1_kentat", "page", "normal", "high");
        add_meta_box("henkilo2", "Henkilo 2", "luo_h2_kentat", "page", "normal", "high");
        add_meta_box("henkilo3", "Henkilo 3", "luo_h3_kentat", "page", "normal", "high");
        add_meta_box("henkilo4", "Henkilo 4", "luo_h4_kentat", "page", "normal", "high");
        }
 }
add_action( 'add_meta_boxes_page', 'tt_henkilosto' );


// --- METABOX: CAREER ... CONTENTS --- //
function luo_h1_kentat(){
$h1_kentat="";
    $h1_kentat = '<label for="h1_nimi">Nimi</label><input type="text" class="henkilosto_kentta" id="h1_nimi" name="h1_nimi" value="' . get_post_meta( $post_id, 'h1_nimi', true ) . '">';
    $h1_kentat .= '<label for="h1_titteli">Titteli</label><input type="text" class="henkilosto_kentta" id="h1_titteli" name="h1_titteli" value="' . get_post_meta( $post_id, 'h1_titteli', true ) . '">';
    $h1_kentat .= '<label for="h1_numero">Numero</label><input type="text" class="henkilosto_kentta" id="h1_numero" name="h1_numero" value="' . get_post_meta( $post_id, 'h1_numero', true ) . '">';
echo $h1_kentat;
    }
function luo_h2_kentat(){

$h2_kentat="";
    $h2_kentat = '<label for="h2_nimi">Nimi</label><input type="text" class="henkilosto_kentta" id="h2_nimi" name="h2_nimi" value="' . get_post_meta( $post->ID, 'h2_nimi', true ) . '">';
    $h2_kentat .= '<label for="h2_titteli">Titteli</label><input type="text" class="henkilosto_kentta" id="h2_titteli" name="h2_titteli" value="' . get_post_meta( $post->ID, 'h2_titteli', true ) . '">';
    $h2_kentat .= '<label for="h2_numero">Numero</label><input type="text" class="henkilosto_kentta" id="h2_numero" name="h2_numero" value="' . get_post_meta( $post->ID, 'h2_numero', true ) . '">';
echo $h2_kentat;
}
function luo_h3_kentat(){
$h3_kentat="";
    $h3_kentat = '<label for="h3_nimi">Nimi</label><input type="text" class="henkilosto_kentta" id="h3_nimi" name="h3_nimi" value="' . get_post_meta( $post->ID, 'h3_nimi', true ) . '">';
    $h3_kentat .= '<label for="h3_titteli">Titteli</label><input type="text" class="henkilosto_kentta" id="h3_titteli" name="h3_titteli" value="' . get_post_meta( $post->ID, 'h3_titteli', true ) . '">';
    $h3_kentat .= '<label for="h3_numero">Numero</label><input type="text" class="henkilosto_kentta" id="h3_numero" name="h3_numero" value="' . get_post_meta( $post->ID, 'h3_numero', true ) . '">';
echo $h3_kentat;
    }
function luo_h4_kentat(){
$h4_kentat="";
    $h4_kentat = '<label for="h4_nimi">Nimi</label><input type="text" class="henkilosto_kentta" id="h4_nimi" name="h4_nimi" value="' . get_post_meta( $post->ID, 'h4_nimi', true ) . '">';
    $h4_kentat .= '<label for="h4_titteli">Titteli</label><input type="text" class="henkilosto_kentta" id="h4_titteli" name="h4_titteli" value="' . get_post_meta( $post->ID, 'h4_titteli', true ) . '">';
    $h4_kentat .= '<label for="h4_numero">Numero</label><input type="text" class="henkilosto_kentta" id="h4_numero" name="h4_numero" value="' . get_post_meta( $post->ID, 'h4_numero', true ) . '">';
echo $h4_kentat;
    }




add_action( 'save_post', 'tt_tallenna' );

function tt_tallenna( ) {
    $post_id = $_GET['post'] ? $_GET['post'] : $_POST['post_ID'];
    /*
     * We need to verify this came from our screen and with proper authorization,
     * because the save_post action can be triggered at other times.
     */

    // Check if our nonce is set.

    if ( ! isset( $_POST['tt_nonce_kentta'] ) ) {
        return;
    }

    // Verify that the nonce is valid.
    if ( ! wp_verify_nonce( $_POST['tt_nonce_kentta'], 'tt_henkilosto' ) ) {
        return;
    }

    // If this is an autosave, our form has not been submitted, so we don't want to do anything.
    if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
        return;
    }

    // Check the user's permissions.
    if ( get_the_ID() == '12' ) {

        if ( ! current_user_can( 'edit_page', $post_id ) ) {
            return;
        }

    } else {

        if ( ! current_user_can( 'edit_post', $post_id ) ) {
            return;
        }
    }

    /* OK, its safe for us to save the data now. */

    // Make sure that it is set.
    if ( ! isset( $_POST['tt_henkilosto'] ) ) {
        return;
    }

    // Sanitize user input.
    $my_h1_nimi = sanitize_text_field( $_POST['h1_nimi'] );
    $my_h1_titteli = sanitize_text_field( $_POST['h1_titteli'] );
    $my_h1_numero = sanitize_text_field( $_POST['h1_numero'] );

    $my_h2_nimi = sanitize_text_field( $_POST['h2_nimi'] );
    $my_h2_titteli = sanitize_text_field( $_POST['h2_titteli'] );
    $my_h2_numero = sanitize_text_field( $_POST['h2_numero'] );

    $my_h3_nimi = sanitize_text_field( $_POST['h3_nimi'] );
    $my_h3_titteli = sanitize_text_field( $_POST['h3_titteli'] );
    $my_h3_numero = sanitize_text_field( $_POST['h3_numero'] );

    $my_h4_nimi = sanitize_text_field( $_POST['h4_nimi'] );
    $my_h4_titteli = sanitize_text_field( $_POST['h4_titteli'] );
    $my_h4_numero = sanitize_text_field( $_POST['h4_numero'] );

    // Update the meta field in the database.
    update_post_meta( $post_id, 'h1_nimi', $my_h1_nimi );
    update_post_meta( $post_id, 'h1_titteli', $my_h1_titteli );
    update_post_meta( $post_id, 'h1_numero', $my_h1_numero );

    update_post_meta( $post_id, 'h2_nimi', $my_h2_nimi );
    update_post_meta( $post_id, 'h2_titteli', $my_h2_titteli );
    update_post_meta( $post_id, 'h2_numero', $my_h2_numero );

    update_post_meta( $post_id, 'h3_nimi', $my_h3_nimi );
    update_post_meta( $post_id, 'h3_titteli', $my_h3_titteli );
    update_post_meta( $post_id, 'h3_numero', $my_h3_numero );

    update_post_meta( $post_id, 'h4_nimi', $my_h4_nimi );
    update_post_meta( $post_id, 'h4_titteli', $my_h4_titteli );
    update_post_meta( $post_id, 'h4_numero', $my_h4_numero );
}?>