add_post_meta() : Adds a meta field to the given post. Below is the example, <?php $post_id = 1; $meta_key = ‘_test’; $meta_value=”this is a test”; $unique = true; add_post_meta( $post_id, $meta_key, $meta_value, $unique ); update_post_meta() : if the given key already exists among custom fields of the specified post, another custom field with the same … Read more
Your missing the prefix: Make sure you call global $prefix after your query and use $prefix.’checkbox’ to your get_post_meta <?php if ($meta_box = get_post_meta($post->ID, $prefix.’checkbox’, true) ) : ?> Show this when checkbox checked <?php endif; ?>
Once you’re in the function that actually prints the html for the metabox, the global $post object should always be set the to current post. Is there a specific reason that you need to know the post_id during init?
Add meta data as “flat” data to the post The actual problem is, that your meta data comes back as array (with a single entry), when calling get_post_custom( $id ); for your post. Here’s a simple function, that adds all meta data attached to a post to your post object. /** * Merges custom/meta data … Read more
Try this. This is part of some code I use. // Add meta boxes to Page add_meta_box( ‘RelatedImage’, __(‘Related images’), ‘related_images_meta_box’, ‘page’, ‘normal’, ‘high’ ); function related_images_meta_box($object) { $nonce = wp_create_nonce(plugin_basename( __FILE__ )); ?> <input type=”hidden” name=”wp_filebrowser_nonce” id=”wp_filebrowser_nonce” value=”<?php echo $nonce; ?>” /> <table> <tr> <td> <label for=”related_image” class=””>Related image</label> </td> <td> <input type=”text” id=”related_image” … Read more
Turn off custom fields syncronisation on polylang. I would also then add specific code to tell polylang to copy (not sync) the metas upon translation creation (so when you click ‘+’ it will also copy the metas, but changing the metas after this, won’t sync with other translations): add_filter(‘pll_copy_post_metas’, ‘copy_post_metas’, 10, 2); function copy_post_metas($metas, $sync){ … Read more
If you don’t need to query on the data, you can pass arrays directly to the post meta functions, WordPress will automatically serialize/unserialize the data for you. $your_array = array( array( ‘title’ => ‘something’, ‘price’ => ‘something’, ), array( ‘title’ => ‘something’, ‘price’ => ‘something’, ), ); update_post_meta( $post_id, ‘your_key’, $your_array );
Using classes like you are, your callback function is implemented wrong: add_meta_box( ‘post_format_box’ ,__( ‘Post Format Content’, self::LANG ) ,@$this->render() ,’post’ ,’advanced’ ,’high’ ); Should be: add_meta_box( ‘post_format_box’ ,__( ‘Post Format Content’, self::LANG ) ,array($this, ‘render’) ,’post’ ,’advanced’ ,’high’ );
The class you are using accepts value => name pair in the select options array so foreach ( $GLOBALS[‘wp_registered_sidebars’] as $sidebar ) { $sidebar_options[$sidebar[‘id’]] = $sidebar[‘name’]; } and then you can use $sidebar_options.
The parameters have the same meaning, they are just named inconsistent. Both accept calls to a function. This can even be the same function. Here is a simple demo as a plugin. Download /* Plugin Name: Callback Demo Description: Demonstrating how a meta box and a menu page can take the same callback function. Version: … Read more