• internationalization
• WordPress Flow
• Translations wrapper functions
• gettext hook

Internationalization is the process of making our plugins/themes ready to be translated into other languages.

POT, PO and MO files

WordPress Flow

I got through the wordpress core files to learn how exactly the files are run one by one, like how the wordpress flow works to better understand the actions and filters.

1. Index.php file is entry point when an user visits the WordPress blog
2. After index.php wp-blog-header.php is loaded. This file loads the wp-load.php file to load the wordpress
3. Then it moves to loading template-loader.php
4. the template loader redirects to the template and emits template-redirect action

__() , _e() functions in i18n

In order to make a string translatable in your application you have to just wrap the original string in a __() function:

__( 'Hello, dear user!', 'movie-library' );

If your code should echo the string to the browser, use the _e() function instead：

_e( 'Watch from here', 'movie-library' );

gettext hook

The gettext filter is used to translate the strings in our plugin

function my_text_strings( $translated_text, $text, $domain ) {
	switch ( $translated_text ) {
		case 'Salman' :
			$translated_text = __( 'Bhai!', 'movie-library' );
			break;
	}
	return $translated_text;
}
add_filter( 'gettext', 'my_text_strings', 20, 3 );