i18-demo-internationalized.php

<?php
// Load the translations, if there are any.
add_action( 'init', 'dcwd_i18n_demo_load_theme_textdomain' );
function dcwd_i18n_demo_load_theme_textdomain() {
	load_plugin_textdomain( 'i18n-demo', false, basename( dirname( __FILE__ ) ) . '/languages' );
}


add_action( 'wp_head', 'dcwd_internationalized_code' );
function dcwd_internationalized_code() {
?>
<?php // For the simple comment we just convert it into a string that is echoed. ?>
<!-- <?php _e( 'This is a simple comment.', 'i18n-demo' ); ?> -->
<?php
// Here I chose to exclude the comment codes in case the translator mistakenly edits them.
printf( "<!-- " . __( 'This site is running WordPress version %s', 'i18n-demo' ) . "-->\n", get_bloginfo( 'version' ), "\n" );

$hour = date( 'G' ); // Get the hour.
if ( $hour < 6 ) {
  // For this string I provide some context for the translator.
	echo "<!-- " . _x( 'Good night.', 'A greeting for before 6:00.', 'i18n-demo' ) . " -->\n";
}
if ( ( $hour >= 6 ) && ( $hour <= 12 ) ) {
	echo "<!-- " . _x( 'Good morning.', 'A greeting for between 6:00 and 11:59.', 'i18n-demo' ) . " -->\n";
}
if ( ( $hour > 12 ) && ( $hour < 18 ) ) {
	echo "<!-- " . _x( 'Good afternoon.', 'A greeting for between 12:00 and 17:59.', 'i18n-demo' ) . " -->\n";
}
if ( $hour >= 18 ) {
	echo "<!-- " . _x( 'Good evening.', 'A greeting for after 18:00.', 'i18n-demo' ) . " -->\n";
}

// Here I omitted the '%s' and included a context note.
// Maybe I should leave it in the translatable string in case some languages need to change the order.
printf( "<!-- " . _x( 'Today is', 'The day of the week will be appended.', 'i18n-demo' ) . " %s -->\n", date( 'l' ) );  // Print the day of the week.
}

i18n-demo-blank.pot

# Based on: https://github.com/naokomc/Blank-WordPress-Pot/blob/master/Blank-WordPress.pot
# i18n Demo Blank Pot
# Copyright (C) 2020 ...
# This file is distrubuted under the GPL-2.0+
msgid ""
msgstr ""
"Project-Id-Version: i18n-demo Pot v1.0.0\n"
"POT-Creation-Date: 2020-07-26 12:00+0100\n"
"PO-Revision-Date: \n"
"Last-Translator: Damien Carbery <damien@damiencarbery.com>\n"
"Language-Team: Damien Carbery <damien@damiencarbery.com>\n"
"Report-Msgid-Bugs-To: Damien Carbery <damien@damiencarbery.com>\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
"Plural-Forms: nplurals=2; plural=n != 1;\n"
"X-Textdomain-Support: yes"
"X-Generator: Poedit 2.4\n"
"X-Poedit-SourceCharset: UTF-8\n"
"X-Poedit-KeywordsList: __;_e;_x;esc_html_e;esc_html__;esc_attr_e;esc_attr__;_ex:1,2c;_nx:4c,1,2;_nx_noop:4c,1,2;_x:1,2c;_n:1,2;_n_noop:1,2;__ngettext_noop:1,2;_c,_nc:4c,1,2;\n"
"X-Poedit-Basepath: ../\n"
"X-Poedit-SearchPath-0: .\n"
"X-Poedit-Language: English\n"
"X-Poedit-Country: UNITED STATES\n"
"X-Poedit-Bookmarks: \n"

i18n-demo-internationalized.html

<!-- Locale: en_US -->
<!-- This is a simplé cómmént. -->
<!-- This sité is running WórdPréss vérsión 5.4.2-->
<!-- Góód événing. -->
<!-- Tóday is Saturday -->

i18n-demo-starting-code.html

<!-- Locale: en_US -->
<!-- This is a simple comment. -->
<!-- This site is running WordPress version 5.4.2-->
<!-- Good evening. -->
<!-- Today is Saturday -->

i18n-demo-starting-code.php

<?php
/*
Plugin Name: i18n demo
Plugin URI: https://www.damiencarbery.com/2020/07/how-to-internationalize-your-code/
Description: A demo on how to internationalize, localize (and test) your WordPress code.
Author: Damien Carbery
Version: 0.1
 */

add_action( 'wp_head', 'dcwd_code_to_internationalize' );
function dcwd_code_to_internationalize() {
?>
<!-- This is a simple comment. -->
<?php
printf( "<!-- This site is running WordPress version %s -->\n", get_bloginfo( 'version' ), "\n" );

$hour = date( 'G' ); // Get the hour.
if ( $hour < 6 ) {
	echo "<!-- Good night. -->\n";
}
if ( ( $hour >= 6 ) && ( $hour <= 12 ) ) {
	echo "<!-- Good morning. -->\n";
}
if ( ( $hour > 12 ) && ( $hour < 18 ) ) {
	echo "<!-- Good afternoon. -->\n";
}
if ( $hour >= 18 ) {
	echo "<!-- Good evening. -->\n";
}

printf( "<!-- Today is %s -->\n", date( 'l' ) );  // Print the day of the week.
}

i18n-demo.pot

# i18n Demo Blank Pot
# Copyright (C) 2020 ...
# This file is distrubuted under the GPL-2.0+
msgid ""
msgstr ""
"Project-Id-Version: i18n-demo Pot v1.0.0\n"
"POT-Creation-Date: 2020-07-26 12:00+0100\n"
"PO-Revision-Date: \n"
"Last-Translator: Damien Carbery <damien@damiencarbery.com>\n"
"Language-Team: Damien Carbery <damien@damiencarbery.com>\n"
"Report-Msgid-Bugs-To: Damien Carbery <damien@damiencarbery.com>\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
"Plural-Forms: nplurals=2; plural=n != 1;\n"
"X-Textdomain-Support: yes\n"
"X-Generator: Poedit 2.4\n"
"X-Poedit-SourceCharset: UTF-8\n"
"X-Poedit-KeywordsList: __;_e;_x;esc_html_e;esc_html__;esc_attr_e;esc_attr__;_ex:1,2c;_nx:4c,1,2;_nx_noop:4c,1,2;_x:1,2c;_n:1,2;_n_noop:1,2;__ngettext_noop:1,2;_c,_nc:4c,1,2;\n"
"X-Poedit-Basepath: ../\n"
"X-Poedit-SearchPath-0: .\n"
"X-Poedit-Language: English\n"
"X-Poedit-Country: UNITED STATES\n"
"X-Poedit-Bookmarks: \n"

#: i18n-demo.php:51
msgid "This is a simple comment."
msgstr ""

#: i18n-demo.php:54
#, php-format
msgid "This site is running WordPress version %s"
msgstr ""

#: i18n-demo.php:59
msgctxt "A greeting for before 6:00."
msgid "Good night."
msgstr ""

#: i18n-demo.php:62
msgctxt "A greeting for between 6:00 and 11:59."
msgid "Good morning."
msgstr ""

#: i18n-demo.php:65
msgctxt "A greeting for between 12:00 and 17:59."
msgid "Good afternoon."
msgstr ""

#: i18n-demo.php:68
msgctxt "A greeting for after 18:00."
msgid "Good evening."
msgstr ""

#: i18n-demo.php:73
msgctxt "The day of the week will be appended."
msgid "Today is"
msgstr ""