Custom meta box for page template not saving data - php

Question

Been banging my head against the wall trying to figure out the solution to my current issue. Simply put, I've created a 'page-home.php' template page, can get a meta box to call on the page template, but trying to update the page with data in the meta box makes the data disappear.
Code below:
function page_add_meta_boxes( $post ) {
global $post;
if(!empty($post))
// get the page template post meta
$page_template = get_post_meta( $post->ID, '_wp_page_template', true );
// if the current page uses our specific template, then output our custom metabox
{
$pageTemplate = get_post_meta($post->ID, '_wp_page_template', true);
// looks for page-home.php file to add our meta box
if($pageTemplate == 'page-home.php' )
{
add_meta_box(
'page-custom-metabox', // $id
'Special Post Meta', // $title
'page_template_metabox', // $callback
'page', // $page
'normal', // $context
'high'); // $priority
}
}
}
add_action( 'add_meta_boxes_page', 'page_add_meta_boxes' );
function page_template_metabox() {
wp_nonce_field( basename( __FILE__ ), 'page_meta_box_nonce' );
$some_string = get_post_meta( $post->ID, '_some_string', true );
?>
<input type="text" name="some-string" value="<?php echo $some_string; ?>" />
<?php
}
function page_save_custom_post_meta() {
if ( !isset( $_POST['page_meta_box_nonce'] ) || !wp_verify_nonce( $_POST['page_meta_box_nonce'], basename( __FILE__ ) ) ){
return;
}
// return if autosave
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ){
return;
}
// check the user's permissions.
if ( ! current_user_can( 'edit_page', $post_id ) ){
return;
}
// save our string
if ( isset( $_REQUEST['some-string'] ) ) {
update_post_meta( $post_id, '_some_string', sanitize_text_field( $_POST['some-string'] ) );
}
}
add_action( 'publish_page', 'page_save_custom_post_meta' );
add_action( 'draft_page', 'page_save_custom_post_meta' );
add_action( 'future_page', 'page_save_custom_post_meta' );
Any suggestions are appreciated.

Answer 1

Howdy anyone who runs into this in the future. I was able to get it to work with the code below, someone might be able to follow up with a better answer as to why it works. My thinking is that updating my code to 'save_post_page' instead of just 'save_post' makes the difference. (Note I only changed some info due to trying to test it in my theme):
// Add meta box
function frontpage_meta_boxes( $post ){
global $post;
if(!empty($post))
$page_template = get_post_meta( $post->ID, '_wp_page_template', true );
{
$pageTemplate = get_post_meta($post->ID, '_wp_page_template', true);
if($pageTemplate == 'page-home.php' )
{
add_meta_box( 'frontpage_meta_box', __( 'Features' ), 'frontpage_meta_box', 'page', 'advanced', 'high' );
}
}
}
add_action( 'add_meta_boxes_page', 'frontpage_meta_boxes' );
// builds our meta box
function frontpage_meta_box( $post ){
// make sure the form request comes from WordPress
wp_nonce_field( basename( __FILE__ ), 'frontpage_meta_box_nonce' );
// retrieve the _manuf_url current value
$manufacturer_url = get_post_meta( $post->ID, '_manuf_url', true );
?>
<h3><?php _e( 'Manufacturer URL' ); ?></h3>
<p>
<input type="text" name="manufacturer-url" value="<?php echo $manufacturer_url; ?>" />
</p>
<?php
}
// saves our data
function frontpage_save_meta_box_data( $post_id ){
// verify meta box nonce
if ( !isset( $_POST['frontpage_meta_box_nonce'] ) || !wp_verify_nonce( $_POST['frontpage_meta_box_nonce'], basename( __FILE__ ) ) ){
return;
}
// return if autosave
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ){
return;
}
// Check the user's permissions.
if ( ! current_user_can( 'edit_post', $post_id ) ){
return;
}
// manufacturer url string
if ( isset( $_REQUEST['manufacturer-url'] ) ) {
update_post_meta( $post_id, '_manuf_url', sanitize_text_field( $_POST['manufacturer-url'] ) );
}
// store custom fields values
}
add_action( 'save_post_page', 'frontpage_save_meta_box_data' );

Answer 2

Try with below code :
function page_save_custom_post_meta($postid) {
if ( !isset( $_POST['page_meta_box_nonce'] ) || !wp_verify_nonce( $_POST['page_meta_box_nonce'], basename( __FILE__ ) ) ){
return;
}
// return if autosave
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ){
return;
}
// check the user's permissions.
if ( ! current_user_can( 'edit_page', $post_id ) ){
return;
}
// save our string
if ( isset( $_REQUEST['some-string'] ) ) {
update_post_meta( $post_id, '_some_string', sanitize_text_field( $_POST['some-string'] ) );
}
}
add_action('save_post ','page_save_custom_post_meta');