(PHP 4, PHP 5, PHP 7)
setlocale — Set locale information
setlocale ( int $category , string $locale , string ...$locales ) : string
setlocale ( int $category , array $locale ) : string
Sets locale information.
The locale information is maintained per process, not per thread. If you are running PHP on a multithreaded server API , you may experience sudden changes in locale settings while a script is running, though the script itself never called setlocale(). This happens due to other scripts running in different threads of the same process at the same time, changing the process-wide locale using setlocale(). On Windows, locale information is maintained per thread as of PHP 5.6.20 and PHP 7.0.5, respectively.
category is a named constant specifying the category of the functions affected by the locale setting:
LC_ALLfor all of the below
LC_COLLATEfor string comparison, see strcoll()
LC_CTYPEfor character classification and conversion, for example strtoupper()
LC_NUMERICfor decimal separator (See also localeconv())
LC_TIMEfor date and time formatting with strftime()
LC_MESSAGESfor system responses (available if PHP was compiled with
null or the empty string
"", the locale names will be set from the values of environment variables with the same names as the above categories, or from "LANG".
"0", the locale setting is not affected, only the current setting is returned.
locale is an array or followed by additional parameters then each array element or parameter is tried to be set as new locale until success. This is useful if a locale is known under different names on different systems or for providing a fallback for a possibly not available locale.
(Optional string or array parameters to try as locale settings until success.)
On Windows, setlocale(LC_ALL, '') sets the locale names from the system's regional/language settings (accessible via Control Panel).
Returns the new current locale, or
false if the locale functionality is not implemented on your platform, the specified locale does not exist or the category name is invalid.
The return value of setlocale() depends on the system that PHP is running. It returns exactly what the system
Example #1 setlocale() Examples
<?php /* Set locale to Dutch */ setlocale(LC_ALL, 'nl_NL'); /* Output: vrijdag 22 december 1978 */ echo strftime("%A %e %B %Y", mktime(0, 0, 0, 12, 22, 1978)); /* try different possible locale names for german */ $loc_de = setlocale(LC_ALL, '[email protected]', 'de_DE', 'de', 'ge'); echo "Preferred locale for german on this system is '$loc_de'"; ?>
Example #2 setlocale() Examples for Windows
<?php /* Set locale to Dutch */ setlocale(LC_ALL, 'nld_nld'); /* Output: vrijdag 22 december 1978 */ echo strftime("%A %d %B %Y", mktime(0, 0, 0, 12, 22, 1978)); /* try different possible locale names for german */ $loc_de = setlocale(LC_ALL, '[email protected]', 'de_DE', 'deu_deu'); echo "Preferred locale for german on this system is '$loc_de'"; ?>
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