friendica/include/pgettext.php

<?php

/**
 * translation support
 */


/**
 *
 * Get the language setting directly from system variables, bypassing get_config()
 * as database may not yet be configured.
 * 
 * If possible, we use the value from the browser.
 *
 */


if(! function_exists('get_language')) {
function get_language() {

	if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
	    // break up string into pieces (languages and q factors)
    	preg_match_all('/([a-z]{1,8}(-[a-z]{1,8})?)\s*(;\s*q\s*=\s*(1|0\.[0-9]+))?/i', 
			$_SERVER['HTTP_ACCEPT_LANGUAGE'], $lang_parse);

    	if (count($lang_parse[1])) {
        	// create a list like "en" => 0.8
        	$langs = array_combine($lang_parse[1], $lang_parse[4]);
    	
        	// set default to 1 for any without q factor
        	foreach ($langs as $lang => $val) {
            	if ($val === '') $langs[$lang] = 1;
        	}

        	// sort list based on value	
        	arsort($langs, SORT_NUMERIC);
    	}
	}

	if(isset($langs) && count($langs)) {
		foreach ($langs as $lang => $v) {
			if(file_exists("view/$lang") && is_dir("view/$lang")) {
				$preferred = $lang;
				break;
			}
		}
	}

	if(isset($preferred))
		return $preferred;

	return ((isset($a->config['system']['language'])) ? $a->config['system']['language'] : 'en');
}}


function push_lang($language) {
	global $lang, $a;

	$a->langsave = $lang;

	if($language === $lang)
		return;

	if(isset($a->strings) && count($a->strings)) {
		$a->stringsave = $a->strings;
	}
	$a->strings = array();
	load_translation_table($language);
	$lang = $language;
}

function pop_lang() {
	global $lang, $a;

	if($lang === $a->langsave)
		return;

	if(isset($a->stringsave))
		$a->strings = $a->stringsave;
	else
		$a->strings = array();

	$lang = $a->langsave;
}


// load string translation table for alternate language

if(! function_exists('load_translation_table')) {
function load_translation_table($lang) {
	global $a;

	if(file_exists("view/$lang/strings.php")) {
		include("view/$lang/strings.php");
	}
	else
		$a->strings = array();
}}

// translate string if translation exists

if(! function_exists('t')) {
function t($s) {

	$a = get_app();

	if(x($a->strings,$s)) {
		$t = $a->strings[$s];
		return is_array($t)?$t[0]:$t;
	}
	return $s;
}}

if(! function_exists('tt')){
function tt($singular, $plural, $count){
	global $lang;
	$a = get_app();

	if(x($a->strings,$singular)) {
		$t = $a->strings[$singular];
		$f = 'string_plural_select_' . str_replace('-','_',$lang);
		$k = $f($count);
		return is_array($t)?$t[$k]:$t;
	}
	
	if ($count!=1){
		return $plural;
	} else {
		return $singular;
	}
}}