How to query language and locale information in PHP

php editor Zimo introduces you how to use PHP to query language and regional settings information. When developing a multilingual website, it is crucial to understand your users' language preferences and regional habits. This functionality can be easily achieved through PHP's built-in functions and extensions. This article will introduce in detail how to use PHP to write code to obtain the user's language and regional settings information, helping you better optimize the website user experience.

Querying language and locale information using PHP

Preface

Language and locale information are critical for internationalized applications. php Provides various functions to retrieve information about the current environment, installed languages, and available locales.

Get the current language settings

• setlocale(LC_ALL, 0): Get the current locale settings.
• setlocale(LC_ALL, "en_US"): Change the locale setting to English (United States).

Localized data

• locale_get_display_language(): Returns the display name of the current language.
• locale_get_display_region(): Returns the display name of the current region.
• locale_get_default(): Returns the default value of the current locale.

Get installed languages

• locale_get_all_languages(): Returns a list of all installed languages.
• in_array("en_US", locale_get_all_languages()): Check whether the English (US) language is installed.

Get installed locale

• locale_get_all_regions(): Returns a list of all installed regions.
• in_array("US", locale_get_all_regions()): Check whether the US region is installed.

Get locale specific information

• localeconv(): Returns specific information about the current locale, such as thousands separator, decimal point, and currency symbol.
• localeconv("currency_symbol"): Get the currency symbol of the current locale.

Set regional settings

• setlocale(LC_ALL, "C"): Resets the locale to the C locale.
• setlocale(LC_ALL, "fr_FR"): Set the locale to French (France).

Convert date and time

• strftime(): Convert a datetime to a string, using a format that matches the current locale.
• mktime(): Convert date and time strings to timestamps, using a format that matches the current locale.

Other useful functions

• getenv("LANG"): Retrieve the current locale variable.
• mb_get_info(): Get information about the current multibyte character set.
• iconv(): Convert strings between different character encodings.

Usage examples

// Get the current locale
$lang = setlocale(LC_ALL, 0);

// Get the display name of the current language
$displayLang = locale_get_display_language();

// Get the list of installed languages
$languages ​​= locale_get_all_languages();

// Check if English (US) language is installed
if (in_array("en_US", $languages)) {
echo "English (US) is installed.";
}

//Set locale
setlocale(LC_ALL, "fr_FR");

// Get the currency symbol of the current locale
$currencySymbol = localeconv("currency_symbol");

// Convert date and time to string
$dateString = strftime("%A, %B %d, %Y", time());

// Convert date and time strings to timestamps
$timestamp = mktime(0, 0, 0, 5, 20, 2023);

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