Custom post meta showing on localhost, but not live server? - wordpress

Question

I'm having an issue and, honestly, I have absolutely no idea what's going on...
I have some custom meta fields for my custom post type (called review). On my local installation, they appear and work perfectly:
However, on live, they don't show up! Completely vanished!
The panel is selected in Screen Options too, so that's not the issue:
Here is the code for my entire custom post type... perhaps I've done something stupid?
<?php
// Register Custom Post Type
function review() {
$labels = array(
'name' => 'Reviews',
'singular_name' => 'Review',
'menu_name' => 'Reviews',
'name_admin_bar' => 'Review',
'archives' => 'Review Archives',
'parent_item_colon' => 'Parent Item:',
'all_items' => 'All Items',
'add_new_item' => 'Add New Item',
'add_new' => 'Add New',
'new_item' => 'New Item',
'edit_item' => 'Edit Item',
'update_item' => 'Update Item',
'view_item' => 'View Item',
'search_items' => 'Search Item',
'not_found' => 'Not found',
'not_found_in_trash' => 'Not found in Trash',
'featured_image' => 'Featured Image',
'set_featured_image' => 'Set featured image',
'remove_featured_image' => 'Remove featured image',
'use_featured_image' => 'Use as featured image',
'insert_into_item' => 'Insert into item',
'uploaded_to_this_item' => 'Uploaded to this item',
'items_list' => 'Items list',
'items_list_navigation' => 'Items list navigation',
'filter_items_list' => 'Filter items list',
);
$args = array(
'label' => 'Review',
'description' => 'A product review',
'labels' => $labels,
'supports' => array( 'title', 'editor', 'excerpt', 'author', 'thumbnail', 'comments', 'revisions'),
'taxonomies' => array( 'category', 'post_tag' ),
'hierarchical' => false,
'public' => true,
'show_ui' => true,
'show_in_menu' => true,
'menu_position' => 5,
'menu_icon' => 'dashicons-edit',
'show_in_admin_bar' => true,
'show_in_nav_menus' => true,
'can_export' => true,
'has_archive' => true,
'exclude_from_search' => false,
'publicly_queryable' => true,
'capability_type' => 'page',
);
register_post_type( 'review', $args );
}
add_action( 'init', 'review', 0 );
//Review options meta
/**
* Generated by the WordPress Meta Box generator
* at http://jeremyhixon.com/tool/wordpress-meta-box-generator/
*/
function review_options_get_meta( $value ) {
global $post;
$field = get_post_meta( $post->ID, $value, true );
if ( ! empty( $field ) ) {
return is_array( $field ) ? stripslashes_deep( $field ) : stripslashes( wp_kses_decode_entities( $field ) );
} else {
return false;
}
}
function review_options_add_meta_box() {
add_meta_box(
'review_options-review-options',
__( 'Review options', 'review_options' ),
'review_options_html',
'review',
'core',
'high'
);
}
add_action( 'add_meta_boxes', 'review_options_add_meta_box' );
function review_options_html( $post) {
wp_nonce_field( '_review_options_nonce', 'review_options_nonce' ); ?>
<p>Options for your reviews</p>
<p>
<label for="review_options_review_score"><?php _e( 'Review Score', 'review_options' ); ?></label><br>
<select name="review_options_review_score" id="review_options_review_score" style="width: 50%;">
<option <?php echo (review_options_get_meta( 'review_options_review_score' ) === '1' ) ? 'selected' : '' ?>>1</option>
<option <?php echo (review_options_get_meta( 'review_options_review_score' ) === '2' ) ? 'selected' : '' ?>>2</option>
<option <?php echo (review_options_get_meta( 'review_options_review_score' ) === '3' ) ? 'selected' : '' ?>>3</option>
<option <?php echo (review_options_get_meta( 'review_options_review_score' ) === '4' ) ? 'selected' : '' ?>>4</option>
<option <?php echo (review_options_get_meta( 'review_options_review_score' ) === '5' ) ? 'selected' : '' ?>>5</option>
<option <?php echo (review_options_get_meta( 'review_options_review_score' ) === '6' ) ? 'selected' : '' ?>>6</option>
<option <?php echo (review_options_get_meta( 'review_options_review_score' ) === '7' ) ? 'selected' : '' ?>>7</option>
<option <?php echo (review_options_get_meta( 'review_options_review_score' ) === '8' ) ? 'selected' : '' ?>>8</option>
<option <?php echo (review_options_get_meta( 'review_options_review_score' ) === '9' ) ? 'selected' : '' ?>>9</option>
<option <?php echo (review_options_get_meta( 'review_options_review_score' ) === '10' ) ? 'selected' : '' ?>>10</option>
</select>
</p> <p>
<label for="review_options_review_title_colour"><?php _e( 'Review title colour', 'review_options' ); ?></label><br>
<select name="review_options_review_title_colour" id="review_options_review_title_colour">
<option <?php echo (review_options_get_meta( 'review_options_review_title_colour' ) === '' ) ? 'selected' : '' ?>>Default</option>
<option <?php echo (review_options_get_meta( 'review_options_review_title_colour' ) === 'black' ) ? 'selected' : '' ?>>Black</option>
<option <?php echo (review_options_get_meta( 'review_options_review_title_colour' ) === 'white' ) ? 'selected' : '' ?>>White</option>
</select>
</p><?php
}
function review_options_save( $post_id ) {
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;
if ( ! isset( $_POST['review_options_nonce'] ) || ! wp_verify_nonce( $_POST['review_options_nonce'], '_review_options_nonce' ) ) return;
if ( ! current_user_can( 'edit_post', $post_id ) ) return;
if ( isset( $_POST['review_options_review_score'] ) )
update_post_meta( $post_id, 'review_options_review_score', esc_attr( $_POST['review_options_review_score'] ) );
if ( isset( $_POST['review_options_review_title_colour'] ) )
update_post_meta( $post_id, 'review_options_review_title_colour', esc_attr( $_POST['review_options_review_title_colour'] ) );
}
add_action( 'save_post', 'review_options_save' );
/*
Usage: review_options_get_meta( 'review_options_review_score' )
Usage: review_options_get_meta( 'review_options_review_title_colour' )
*/
?>
Or perhaps it's something to do with my only other post type?
<?php // Register Custom Post Type
function product() {
$labels = array(
'name' => _x( 'Products', 'Post Type General Name', 'text_domain' ),
'singular_name' => _x( 'Product', 'Post Type Singular Name', 'text_domain' ),
'menu_name' => __( 'Product', 'text_domain' ),
'name_admin_bar' => __( 'Product', 'text_domain' ),
'archives' => __( 'Products', 'text_domain' ),
'parent_item_colon' => __( 'Product', 'text_domain' ),
'all_items' => __( 'All Products', 'text_domain' ),
'add_new_item' => __( 'Add New Product', 'text_domain' ),
'add_new' => __( 'Add New', 'text_domain' ),
'new_item' => __( 'New Product', 'text_domain' ),
'edit_item' => __( 'Edit Product', 'text_domain' ),
'update_item' => __( 'Update Product', 'text_domain' ),
'view_item' => __( 'View Product', 'text_domain' ),
'search_items' => __( 'Search Products', 'text_domain' ),
'not_found' => __( 'Not found', 'text_domain' ),
'not_found_in_trash' => __( 'Not found in Trash', 'text_domain' ),
'featured_image' => __( 'Featured Image', 'text_domain' ),
'set_featured_image' => __( 'Set featured image', 'text_domain' ),
'remove_featured_image' => __( 'Remove featured image', 'text_domain' ),
'use_featured_image' => __( 'Use as featured image', 'text_domain' ),
'insert_into_item' => __( 'Insert into Product', 'text_domain' ),
'uploaded_to_this_item' => __( 'Uploaded to this Product', 'text_domain' ),
'items_list' => __( 'Product list', 'text_domain' ),
'items_list_navigation' => __( 'Product list navigation', 'text_domain' ),
'filter_items_list' => __( 'Filter Product list', 'text_domain' ),
);
$args = array(
'label' => __( 'Product', 'text_domain' ),
'description' => __( 'A product', 'text_domain' ),
'labels' => $labels,
'supports' => array( 'title', 'editor', 'thumbnail', ),
'hierarchical' => false,
'public' => true,
'show_ui' => true,
'show_in_menu' => true,
'menu_position' => 8,
'menu_icon' => 'dashicons-archive',
'show_in_admin_bar' => true,
'show_in_nav_menus' => true,
'can_export' => true,
'has_archive' => true,
'exclude_from_search' => true,
'publicly_queryable' => true,
'capability_type' => 'page',
);
register_post_type( 'product', $args );
}
add_action( 'init', 'product', 0 );
//Creation of Meta Box for post type "destination_category" (Start)
add_action( 'admin_init', 'my_destination_category' );
//destination_sub_category_admin - is the required HTML id attribute
//Select Destination Sub Category - is the text visible in the heading of the meta box section
//display_destination_subcategory_meta_box - is the callback which renders the contents of the meta box
//destination_category - is the name of the custom post type where the meta box will be displayed
// normal - defines the part of the page where the edit screen section should be shown
// high - defines the priority within the context where the boxes should show
function my_destination_category() {
foreach( array( 'post', 'review' ) as $pt )
add_meta_box(
'destination_sub_category_admin',
'Select Destination Sub Category',
'display_destination_subcategory_meta_box',
$pt,
'normal',
'high');
function display_destination_subcategory_meta_box( $select_category ) {
// Retrieve Current Selected Category ID based on the Category Created
global $wpdb;
$selectcat="SELECT * FROM ".$wpdb->prefix."posts WHERE `post_type`='product' AND `post_status`='publish' ORDER BY `ID` DESC";
$resultant = $wpdb->get_results($selectcat);
$rescount=count($resultant);
$category_selected_id = intval( get_post_meta( $select_category->ID, 'destination_category_id', true ) );
?>
<table>
<tr>
<td style="width: 150px">Select Category</td>
<td>
<select style="width: 100px" name="category_selection" id="meta_box_category" style="float:left; width:50%; !important">
<?php
if($rescount==0)
{?>
<option value="null">No Posts have been created</option>
<?php
}
else
{
// Generate all items of drop-down list
?>
<option value="">None</option>
<?php
foreach($resultant as $singleresultant)
{
?>
<option value="<?php echo $singleresultant->ID; ?>" <?php echo selected( $singleresultant->ID, $category_selected_id ); ?>>
<?php echo $singleresultant->post_title; ?>
</option>
<?php
}
}
?>
</select>
</td>
</tr>
</table>
<?php
}
// Registering a Save Post Function
add_action( 'save_post', 'destination_admin_sub_category', 10, 2 );
function destination_admin_sub_category( $select_category_id, $select_category ) {
if ( $select_category->post_type == 'post' || 'review' ) {
if ( isset( $_POST['category_selection'] ) && $_POST['category_selection'] != '' ) {
echo update_post_meta( $select_category_id, 'destination_category_id', $_POST['category_selection'] );
} }
}
}
/**
* Generated by the WordPress Meta Box Generator at
*/
class Rational_Meta_Box {
private $screens = array(
'product',
);
private $fields = array(
array(
'id' => 'box-art',
'label' => 'Box Art',
'type' => 'media',
),
array(
'id' => 'developer',
'label' => 'Developer',
'type' => 'text',
),
array(
'id' => 'publisher',
'label' => 'Publisher',
'type' => 'text',
),
array(
'id' => 'release-date',
'label' => 'Release Date',
'type' => 'date',
),
);
/**
* Class construct method. Adds actions to their respective WordPress hooks.
*/
public function __construct() {
add_action( 'add_meta_boxes', array( $this, 'add_meta_boxes' ) );
add_action( 'admin_footer', array( $this, 'admin_footer' ) );
add_action( 'save_post', array( $this, 'save_post' ) );
}
/**
* Hooks into WordPress' add_meta_boxes function.
* Goes through screens (post types) and adds the meta box.
*/
public function add_meta_boxes() {
foreach ( $this->screens as $screen ) {
add_meta_box(
'product-options',
__( 'Product Options', 'product-options' ),
array( $this, 'add_meta_box_callback' ),
$screen,
'advanced',
'core'
);
}
}
/**
* Generates the HTML for the meta box
*
* #param object $post WordPress post object
*/
public function add_meta_box_callback( $post ) {
wp_nonce_field( 'product_options_data', 'product_options_nonce' );
echo 'Options for products';
$this->generate_fields( $post );
}
/**
* Hooks into WordPress' admin_footer function.
* Adds scripts for media uploader.
*/
public function admin_footer() {
?><script>
// https://codestag.com/how-to-use-wordpress-3-5-media-uploader-in-theme-options/
jQuery(document).ready(function($){
if ( typeof wp.media !== 'undefined' ) {
var _custom_media = true,
_orig_send_attachment = wp.media.editor.send.attachment;
$('.rational-metabox-media').click(function(e) {
var send_attachment_bkp = wp.media.editor.send.attachment;
var button = $(this);
var id = button.attr('id').replace('_button', '');
_custom_media = true;
wp.media.editor.send.attachment = function(props, attachment){
if ( _custom_media ) {
$("#"+id).val(attachment.url);
} else {
return _orig_send_attachment.apply( this, [props, attachment] );
};
}
wp.media.editor.open(button);
return false;
});
$('.add_media').on('click', function(){
_custom_media = false;
});
}
});
</script><?php
}
/**
* Generates the field's HTML for the meta box.
*/
public function generate_fields( $post ) {
$output = '';
foreach ( $this->fields as $field ) {
$label = '<label for="' . $field['id'] . '">' . $field['label'] . '</label>';
$db_value = get_post_meta( $post->ID, 'product_options_' . $field['id'], true );
switch ( $field['type'] ) {
case 'media':
$input = sprintf(
'<input class="regular-text" id="%s" name="%s" type="text" value="%s"> <input class="button rational-metabox-media" id="%s_button" name="%s_button" type="button" value="Upload" />',
$field['id'],
$field['id'],
$db_value,
$field['id'],
$field['id']
);
break;
default:
$input = sprintf(
'<input %s id="%s" name="%s" type="%s" value="%s">',
$field['type'] !== 'color' ? 'class="regular-text"' : '',
$field['id'],
$field['id'],
$field['type'],
$db_value
);
}
$output .= $this->row_format( $label, $input );
}
echo '<table class="form-table"><tbody>' . $output . '</tbody></table>';
}
/**
* Generates the HTML for table rows.
*/
public function row_format( $label, $input ) {
return sprintf(
'<tr><th scope="row">%s</th><td>%s</td></tr>',
$label,
$input
);
}
/**
* Hooks into WordPress' save_post function
*/
public function save_post( $post_id ) {
if ( ! isset( $_POST['product_options_nonce'] ) )
return $post_id;
$nonce = $_POST['product_options_nonce'];
if ( !wp_verify_nonce( $nonce, 'product_options_data' ) )
return $post_id;
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
return $post_id;
foreach ( $this->fields as $field ) {
if ( isset( $_POST[ $field['id'] ] ) ) {
switch ( $field['type'] ) {
case 'email':
$_POST[ $field['id'] ] = sanitize_email( $_POST[ $field['id'] ] );
break;
case 'text':
$_POST[ $field['id'] ] = sanitize_text_field( $_POST[ $field['id'] ] );
break;
}
update_post_meta( $post_id, 'product_options_' . $field['id'], $_POST[ $field['id'] ] );
} else if ( $field['type'] === 'checkbox' ) {
update_post_meta( $post_id, 'product_options_' . $field['id'], '0' );
}
}
}
}
new Rational_Meta_Box;
?>
Either way, I have absolutely no idea why it's working perfectly locally and messing up on my live server... it's baffling!
Thanks in advance for your help!