Fixing Notice: Function _load_textdomain_just_in_time was called incorrectly for WordPress 6.7 update

Since the WordPress version update 6.7.0, I ran into this notice Function _load_textdomain_just_in_time was called incorrectly. Normally it was indicating that it has something to do with including text-domain of the plugin using ‘plugin-loaded’ action hook. Unfortunately, it was not the case. The problem was caused by using the get_plugin_data() function too early, specifically inside the constructor of my plugin’s main class. Here’s how I fixed it.

What I Was Doing Before

I was directly calling get_plugin_data() in the constructor, like this:

if ( ! function_exists( 'get_plugin_data' ) ) {
    require_once ABSPATH . 'wp-admin/includes/plugin.php';
}

$this->version = get_plugin_data( __FILE__ )['Version'];

This caused notices because it’s not safe to call this function before WordPress is fully initialized.

The Fix

I created a separate function in my class to fetch plugin details only when needed:

public function get_plugin_details( $key = 'Version' ) {

    require_once ABSPATH . 'wp-admin/includes/plugin.php';

    $plugin_data = get_plugin_data( __FILE__, false, false );

    return $plugin_data[ $key ];
}

Then, I used this function wherever required:

this->plugin_name = $this->get_plugin_details( 'Name' );
self::$version     = $this->get_plugin_details();

Why It Works

By delaying the call to get_plugin_data() and using it only when necessary, I avoided notices and made my plugin more stable.

Conclusion

If you’re getting notices while using get_plugin_data(), avoid calling it in the constructor. Use a dedicated function to fetch the data when needed, and you’ll save yourself a lot of headaches!