daily notes

• defined( 'ABSPATH' ) || exit; contains the absolute path to the WordPress root directory. If php run directly, it exits.

$this

• Refers to the current object instance
• Used for non-static properties and methods
• Only available inside object context

self::

• Refers to the class itself
• Used for static properties and methods
• Does NOT require an object

• add_action( 'init', array( $post_types, 'register_post_types' ) ) is a callable reference that means:

When the init hook fires, call $post_types->register_post_types()

• load_plugin_textdomain() is a WordPress function that tells WordPress:

Here’s the folder and text domain for my plugin translations — load them now.”

• It basically activates your plugin’s translations so all __() and _e() strings can be displayed in the user’s language.

dirname( plugin_basename( __FILE__ ) ) . '/languages' → relative path to translations

Let’s break it down:

1. __FILE__ → full path of the current PHP file
   Example: /var/www/html/wp-content/plugins/rt-movie-db/rt-movie-db.php

2. plugin_basename(__FILE__) → plugin folder + main file relative to /wp-content/plugins/ rt-movie-db/rt-movie-db.php

3. dirname(...) → just the folder name rt-movie-db

4. dirname(...) . '/languages' → folder where .mo files live rt-movie-db/languages

Translation

Code:

echo __( 'Watch Movie', 'rt-movie-db' );
echo _x( 'Movies', 'post type general name', 'rt-movie-db' );

.po file snippet (French):

msgid "Watch Movie"
msgstr "Regarder le film"

msgctxt "post type general name"
msgid "Movies"
msgstr "Films"

WordPress will output:

Regarder le film
Films

• COmmon labels

• Common args: