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How to change the language in PHP code? Learn the easy way

If you want to make your website or web application multilingual, you need to enable language switching in your PHP code. Questions like "how to change language in PHP code" are often asked, especially by developers building websites for international users. Let's learn how you can easily add this feature to PHP.

1. Create language files

First, create separate files for each language (e.g., lang_en.php and lang_hi.php). Write the text in these files using a key-value format:

$lang['welcome'] = 'welcome';

Similarly, add translations for each text code.

2. Take language input from the user

You can have the user select their preferred language via a language selector (e.g., a dropdown menu). Store the selected language in a session or cookie:

$_SESSION['lang'] = 'hi';

3. Include the correct language file

Import the correct file in PHP based on the user's selected language:

include 'lang_' . $_SESSION['lang'] . '.php';
echo $lang['welcome'];

This will display your website content in the user's selected language.

4. Translation and Testing

After changing the language, thoroughly check the translation of each paragraph and button. For better results, you can also use PHP's built-in functions like setlocale().

Tip: Start with Simple Array-Based Translation!

array-based language files are the easiest and most lightweight technique to start with. Later, as your website grows, you can learn to use gettext or other advanced internationalization tools.