How Can I Reliably Detect Browser Language and Load Corresponding Pages in PHP?

How to Detect Browser Language Using PHP

Problem:
You are encountering issues with a PHP script that detects browser language to load specific website pages based on the user's language. The current script doesn't accurately detect all languages, always defaulting to English.

Solution:

Here's a more robust approach to detect the browser language:

<?php
    $lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
    $acceptLang = ['fr', 'it', 'en'];
    $lang = in_array($lang, $acceptLang) ? $lang : 'en';

    require_once "index_{$lang}.php";

Detailed Explanation:

1. Get Language from HTTP Header: The script retrieves the HTTP_ACCEPT_LANGUAGE header and extracts the first two characters, which typically represent the language.
2. Check Accepted Languages: It compares the detected language with a predefined list of accepted languages ($acceptLang). If the language is in the list, it's used; otherwise, English is used as a fallback.
3. Load Page Based on Language: Finally, it includes the PHP file that corresponds to the detected language. In your case, you could have files like "index_fr.php", "index_it.php", and "index_en.php" for French, Italian, and English, respectively.

This simplified approach uses PHP's built-in language detection functionality and provides a more reliable solution compared to the original script, ensuring that the correct language-specific pages are loaded based on the user's browser settings.

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