Change Custom Meta Box in post into Page - php

Question

I've developed Meta Box plugin in a Custom Post as per this playlist. (I made some custermizations to that) In here he created a custom post using the plugin and do all the metabox operation on that relevant post.
It works fine. But my requirement is to display this meta box in a page.
Here is my code.
metabox.php (plugin code)
<?php
function wpl_owt_custom_init_cpt(){
$args = array(
'public' => true,
'label' => 'Books',
'supports' => array('title' , 'editor' , 'author' , 'thumbnail' , 'excerpt' , 'comments')
);
register_post_type('book' , $args);
}
add_action('init', 'wpl_owt_custom_init_cpt');
function wpl_owt_register_metabox_cpt(){
//custom post type
add_meta_box("owt-cpt-id" , "Contact Details" , "wpl_owt_book_function" , "book" , "normal" , "high");
}
add_action("add_meta_boxes_book" , "wpl_owt_register_metabox_cpt");
/**********Callback function for metabox at custom post type book******************/
function wpl_owt_book_function( $post ) {
//echo "<p>Custom metabox for custom post type</p>";
define("_FILE_", "_FILE_");
wp_nonce_field( basename(_FILE_), "wp_owt_cpt_nonce");
echo "<label for='txtPhoneNum'>Phone</label><br>";
$phone_num = get_post_meta($post->ID, "telNo" , true);
echo "<input type ='tel' name = 'txtPhoneNum' value = '" . $phone_num . "'' placeholder = 'Phone Number' /><br><br>";
echo "<label for='txtEmail'>Email</label><br>";
$email = get_post_meta($post->ID, "email" , true);
echo "<input type ='email' name = 'txtEmail' value = '" . $email . "'' placeholder = 'Email Address' /><br><br>";
echo "<label for='txtHours'>Hours of Operation</label><br>";
$hours = get_post_meta($post->ID, "hourofOps" , true);
echo "<input type ='text' name = 'txtHours' value = '" . $hours . "'' placeholder = 'Working Hours' /><br><br>";
}
add_action("save_post" , "wpl_owt_save_metabox_data" , 10 , 2);
function wpl_owt_save_metabox_data($post_id, $post){
//verify nonce
if(!isset($_POST['wp_owt_cpt_nonce']) || !wp_verify_nonce($_POST['wp_owt_cpt_nonce'], basename(_FILE_))){
return $post_id;
}
//verify slug value
$post_slug = "book";
if($post_slug != $post->post_type){
return;
}
//save value to db filed
$pub_tel = '';
if(isset($_POST['txtPhoneNum'])){
$pub_tel = sanitize_text_field($_POST['txtPhoneNum']);
}
else{
$pub_tel = '';
}
update_post_meta($post_id, "telNo", $pub_tel);
$pub_email = '';
if(isset($_POST['txtEmail'])){
$pub_email = sanitize_text_field($_POST['txtEmail']);
}
else{
$pub_email = '';
}
update_post_meta($post_id, "email", $pub_email);
$pub_hours = '';
if(isset($_POST['txtHours'])){
$pub_hours = sanitize_text_field($_POST['txtHours']);
}
update_post_meta($post_id, "hourofOps", $pub_hours);
}
?>
Can someone give me a solution to display the metabox in a page instead of a post.

Answer 1

please have a look as below:
<?php
function add_custom_meta_box()
{
$screens = ['page'];
foreach ($screens as $screen) {
add_meta_box(
'meta_box_id', // Unique ID
'Custom Meta Box Title', // Box title
'callback_function', // Content callback, must be of type callable
$screen // Post type
);
}
}
add_action('add_meta_boxes', 'add_custom_meta_box');
function callback_function($post)
{
/*Do something*/
}
I hope it would help you out

Answer 2

Replace
function wpl_owt_custom_init_cpt(){
$args = array(
'public' => true,
'label' => 'Books',
'supports' => array('title' , 'editor' , 'author' , 'thumbnail' , 'excerpt' , 'comments')
);
register_post_type('book' , $args);
}
add_action('init', 'wpl_owt_custom_init_cpt');
with this
add_action('add_meta_boxes', 'wpl_owt_register_metabox_cpt');
function wpl_owt_register_metabox_cpt()
{
global $post;
if(!empty($post))
{
$pageTemplate = get_post_meta($post->ID, '_wp_page_template', true);
if($pageTemplate == 'page-contact.php' )
{
add_meta_box(
'owt-cpt-id', // $id
'Contact Details', // $title
'wpl_owt_book_function', // $callback
'page', // $page
'normal', // $context
'high'); // $priority
}
}
}
and replace this
$post_slug = "book";
if($post_slug != $post->post_type){
return;
}
with this.
$post_slug = "page";
if($post_slug != $post->post_type){
return;
}
Hope this will work out.