How to use Metabox checkbox to add page ids in array? - php

Question

What I'm trying to do is for a dual-language website. This particular language, Papiamento, isn't supported by Wordpress. Therefore, the client had to create two separate pages, in English and Pap. What I did was to code it like that to display English or Pap menu for each page.
Like this, in header.php:
<?php
if( is_page( array('salon-and-spa-pap', 'tocante-nos', 'testimonio', 'tuma-contacto-cu-nos', 'galeria', 'tratamentonan-di-masahe', 'tratamentonan-spa-di-curpa', 'servicionan-di-boda', 'tratamentonan-spa-di-cara', 'wowo-lip-nek', 'cuido-di-man', 'tratamento-di-huna', 'tratamento-di-huna-di-pia', 'cuido-di-pia', 'salon-p', 'spa-etiquette-pap', 'wax-p', 'reserva-un-tratamento')) ) {
wp_nav_menu(array( 'theme_location' => 'menu_top_pap' ) );
} else {
wp_nav_menu(array( 'theme_location' => 'secondary-menu' ) );
}
?>
However, the problem is that the client will have to keep going back to header.php to add another page slug every time she create a new page. Therefore, I created a Metabox plugin for that. I made a Metabox checkbox so that everytime a page is intended for Papiamento language, the client can just check the box and either the page id or slug will be added to the code above.
I found another question (https://wordpress.stackexchange.com/questions/71043/listing-pages-with-checkboxes-in-a-metabox-and-saving-them) that might be similar to what I was looking for but it didn't work for me.
Here's my metabox function based on this article (http://themefoundation.com/wordpress-meta-boxes-guide/).
<?php
function prfx_custom_meta() {
add_meta_box( 'prfx_meta', __( 'Papiamento Page Box', 'prfx-textdomain' ), 'prfx_meta_callback', 'page', 'normal', 'low' );
}
add_action( 'add_meta_boxes', 'prfx_custom_meta' );
function prfx_meta_callback( $post ) {
wp_nonce_field( basename( __FILE__ ), 'prfx_nonce' );
$prfx_stored_meta = get_post_meta( $post->ID );
$checkfield = maybe_unserialize( get_post_meta($post->ID, "checkfield", true) );
?>
<p>
<span class="prfx-row-title"><?php _e( 'Pap Checkbox', 'prfx-textdomain' )?></span>
<div class="prfx-row-content">
<label for="meta-checkbox">
<input type="checkbox" name="checkfield[]" id="page_<?php echo $page->ID; ?>" value="<?php echo $page->ID; ?>" <?php if ( in_array($page->ID, (array) $checkfield) ) { ?> checked <?php } ?>/> <label for="page_<?php echo $page->ID; ?>"><?php echo $page->post_title; ?>
<?php _e( 'Check if this page is Papiamento', 'prfx-textdomain' )?>
</label>
</div>
</p>
<?php
}
/**
* Saves the custom meta input
*/
function prfx_meta_save( $post_id ) {
// Checks save status
$is_autosave = wp_is_post_autosave( $post_id );
$is_revision = wp_is_post_revision( $post_id );
$is_valid_nonce = ( isset( $_POST[ 'prfx_nonce' ] ) && wp_verify_nonce( $_POST[ 'prfx_nonce' ], basename( __FILE__ ) ) ) ? 'true' : 'false';
// Exits script depending on save status
if ( $is_autosave || $is_revision || !$is_valid_nonce ) {
return;
}
// Checks for input and sanitizes/saves if needed
// Checks for input and saves
if( isset( $_POST[ 'checkfield' ] ) ) {
update_post_meta($post_id, "checkfield", $_POST['checkfield'] );
}
}
add_action( 'save_post', 'prfx_meta_save' );
and calling the page id in header.php like this:
<?php
if( in_array($page->ID, (array) $checkfield) ) {
wp_nav_menu(array( 'theme_location' => 'menu_top_pap' ) );
} else {
wp_nav_menu(array( 'theme_location' => 'secondary-menu' ) );
}
?>
But it didn't work. Please help!
***************** UPDATE *****************
I've been trying to edit the function prfx_meta_callback( $post ) but with no success. Here's the latest code I'm trying to modify...
function prfx_meta_callback( $post ) {
wp_nonce_field( basename( __FILE__ ), 'prfx_nonce' );
$checkfield = maybe_unserialize( get_post_meta($post->ID, "checkfield", true) );
$page = get_pages();
$prfx_stored_meta = get_post_meta( $post->ID );
?>
<p>
<span class="prfx-row-title"><?php _e( 'Pap Checkbox', 'prfx-textdomain' )?></span>
<div class="prfx-row-content">
<label for="page_<?php echo $page->ID; ?>">
<input id="page_<?php echo $page->ID; ?>" type="checkbox" name="checkfield[]" value="<?php echo $page->ID; ?>" <?php if ( isset($checkfield [ ?>'<?php echo $page->ID; ?>'<?php ] ) ) checked( $checkfield[ ?>'<?php echo $page->ID; ?>'<?php ][0], '<?php echo $page->ID; ?>'); ?>/> <?php _e( 'Check if this page is Papiamento', 'prfx-textdomain' )?></label> <br>
</div>
</p>
<?php
I've been trying to make it like that, if Pap, then checked, but if not Pap, unchecked in every page.

Answer 1

If the metabox is saving the checkbox settings properly, you can use the following code to make the check in header.php:
if ( in_array( get_the_ID(), get_post_meta( get_the_ID(), 'checkfield', true ) ) ) {
wp_nav_menu(array( 'theme_location' => 'menu_top_pap' ) );
} else {
wp_nav_menu(array( 'theme_location' => 'secondary-menu' ) );
}