How does the http_build_query function in PHP help with generating query strings for language switching?

When generating query strings for language switching in PHP, we need to include the language parameter along with its corresponding value in the URL. The http_build_query function in PHP helps by taking an array of key-value pairs and encoding them into a URL-encoded query string. This function simplifies the process of building query strings, making it easier to switch between different languages on a website. 

$languages = array(
    'en' => 'English',
    'es' => 'Spanish',
    'fr' => 'French'
);

$currentLanguage = 'en';

// Generate query string for language switching
$queryString = http_build_query(array('lang' => $currentLanguage));

// Append the query string to the current URL
$newUrl = $_SERVER['PHP_SELF'] . '?' . $queryString;

echo $newUrl;

Keywords

http_build_query PHP query strings language switching function

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