code:
<?php
/*
   Copyright (c) 2003,2004,2005,2009 Danilo Segan <danilo@kvota.net>.
   Copyright (c) 2005,2006 Steven Armstrong <sa@c-area.ch>

   This file is part of PHP-gettext.

   PHP-gettext is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   PHP-gettext is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with PHP-gettext; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

error_reporting(E_ALL | E_STRICT);

// define constants
define('PROJECT_DIR', realpath('./'));
define('LOCALE_DIR', PROJECT_DIR .'/locale');
define('DEFAULT_LOCALE', 'en_US');

require_once('../gettext.inc');

$supported_locales = array('en_US', 'sr_CS', 'de_CH');
$encoding = 'UTF-8';

$locale = (isset($_GET['lang']))? $_GET['lang'] : DEFAULT_LOCALE;

// gettext setup
T_setlocale(LC_MESSAGES, $locale);
// Set the text domain as 'messages'
$domain = 'messages';
bindtextdomain($domain, LOCALE_DIR);
// bind_textdomain_codeset is supported only in PHP 4.2.0+
if (function_exists('bind_textdomain_codeset')) {
    bind_textdomain_codeset($domain, $encoding);
}
textdomain($domain);

header("Content-type: text/html; charset=$encoding");
?>

<title>PHP-gettext dropin example</title>

PHP-gettext as a dropin replacement

Example showing how to use PHP-gettext as a dropin replacement for the native gettext library.

<?php
print "
";
foreach ($supported_locales as $l) {
    print "[$l] ";
}
print "
\n";

if (!locale_emulation()) {
    print "
locale '$locale' is supported by your system, using native gettext implementation.
\n";
} else {
    print "
locale '$locale' is _not_ supported on your system, using the default locale '". DEFAULT_LOCALE ."'.
\n";
}
?>

<?php
// using PHP-gettext
print "
";
print _("This is how the story goes.\n\n");
for ($number=6; $number>=0; $number--) {
    print sprintf(
      T_ngettext(
      "%d pig went to the market\n",
      "%d pigs went to the market\n",
      $number
  ),
      $number
  );
}
print "
\n";
?>

« back


code:
<?php
/*
   Copyright (c) 2003,2004,2005,2009 Danilo Segan <danilo@kvota.net>.
   Copyright (c) 2005,2006 Steven Armstrong <sa@c-area.ch>

   This file is part of PHP-gettext.

   PHP-gettext is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   PHP-gettext is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with PHP-gettext; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

error_reporting(E_ALL | E_STRICT);

// define constants
define('PROJECT_DIR', realpath('./'));
define('LOCALE_DIR', PROJECT_DIR .'/locale');
define('DEFAULT_LOCALE', 'en_US');

require_once('../gettext.inc');

$supported_locales = array('en_US', 'sr_CS', 'de_CH');
$encoding = 'UTF-8';

$locale = (isset($_GET['lang']))? $_GET['lang'] : DEFAULT_LOCALE;

// gettext setup
T_setlocale(LC_MESSAGES, $locale);
// Set the text domain as 'messages'
$domain = 'messages';
T_bindtextdomain($domain, LOCALE_DIR);
T_bind_textdomain_codeset($domain, $encoding);
T_textdomain($domain);

header("Content-type: text/html; charset=$encoding");
?>

<title>PHP-gettext fallback example</title>

PHP-gettext as a fallback solution

Example showing how to use PHP-gettext as a fallback solution if the native gettext library is not available or the system does not support the requested locale.

<?php
print "
";
foreach ($supported_locales as $l) {
    print "[$l] ";
}
print "
\n";

if (!locale_emulation()) {
    print "
locale '$locale' is supported by your system, using native gettext implementation.
\n";
} else {
    print "
locale '$locale' is not supported on your system, using custom gettext implementation.
\n";
}
?>

<?php
// using PHP-gettext
print "
";
print T_("This is how the story goes.\n\n");
for ($number=6; $number>=0; $number--) {
    print sprintf(
      T_ngettext(
      "%d pig went to the market\n",
      "%d pigs went to the market\n",
      $number
  ),
      $number
  );
}
print "
\n";
?>

« back

repo_name: suraj/sloth

license: mit


code:
#!/bin/sh
TEMPLATE=pigs.pot
xgettext -kT_ngettext:1,2 -kT_ -L PHP -o $TEMPLATE pigs_dropin.php
if [ "x$1" = "x-p" ]; then
    msgfmt --statistics $TEMPLATE
else
    if [ -f $1.po ]; then
	msgmerge -o .tmp$1.po $1.po $TEMPLATE
	mv .tmp$1.po $1.po
	msgfmt --statistics $1.po
    else
	echo "Usage: $0 [-p|<basename>]"
    fi
fi

path: extlib/php-gettext/examples/update


code:
<?php
/*
   Copyright (c) 2005 Steven Armstrong <sa at c-area dot ch>
   Copyright (c) 2009 Danilo Segan <danilo@kvota.net>

   Drop in replacement for native gettext.

   This file is part of PHP-gettext.

   PHP-gettext is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   PHP-gettext is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with PHP-gettext; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/
/*
LC_CTYPE        0
LC_NUMERIC      1
LC_TIME         2
LC_COLLATE      3
LC_MONETARY     4
LC_MESSAGES     5
LC_ALL          6
*/

// LC_MESSAGES is not available if php-gettext is not loaded
// while the other constants are already available from session extension.
if (!defined('LC_MESSAGES')) {
  define('LC_MESSAGES',	5);
}

require('streams.php');
require('gettext.php');

// Variables

global $text_domains, $default_domain, $LC_CATEGORIES, $EMULATEGETTEXT, $CURRENTLOCALE;
$text_domains = array();
$default_domain = 'messages';
$LC_CATEGORIES = array('LC_CTYPE', 'LC_NUMERIC', 'LC_TIME', 'LC_COLLATE', 'LC_MONETARY', 'LC_MESSAGES', 'LC_ALL');
$EMULATEGETTEXT = 0;
$CURRENTLOCALE = '';

/* Class to hold a single domain included in $text_domains. */
class domain {
  var $l10n;
  var $path;
  var $codeset;
}

// Utility functions

/**
 * Return a list of locales to try for any POSIX-style locale specification.
 */
function get_list_of_locales($locale) {
  /* Figure out all possible locale names and start with the most
   * specific ones.  I.e. for sr_CS.UTF-8@latin, look through all of
   * sr_CS.UTF-8@latin, sr_CS@latin, sr@latin, sr_CS.UTF-8, sr_CS, sr.
   */
  $locale_names = array();
  $lang = NULL;
  $country = NULL;
  $charset = NULL;
  $modifier = NULL;
  if ($locale) {
    if (preg_match("/^(?P<lang>[a-z]{2,3})"              // language code
                   ."(?:_(?P<country>[A-Z]{2}))?"           // country code
                   ."(?:\.(?P<charset>[-A-Za-z0-9_]+))?"    // charset
                   ."(?:@(?P<modifier>[-A-Za-z0-9_]+))?$/",  // @ modifier
                   $locale, $matches)) {

      if (isset($matches["lang"])) $lang = $matches["lang"];
      if (isset($matches["country"])) $country = $matches["country"];
      if (isset($matches["charset"])) $charset = $matches["charset"];
      if (isset($matches["modifier"])) $modifier = $matches["modifier"];

      if ($modifier) {
        if ($country) {
          if ($charset)
            array_push($locale_names, "${lang}_$country.$charset@$modifier");
          array_push($locale_names, "${lang}_$country@$modifier");
        } elseif ($charset)
            array_push($locale_names, "${lang}.$charset@$modifier");
        array_push($locale_names, "$lang@$modifier");
      }
      if ($country) {
        if ($charset)
          array_push($locale_names, "${lang}_$country.$charset");
        array_push($locale_names, "${lang}_$country");
      } elseif ($charset)
          array_push($locale_names, "${lang}.$charset");
      array_push($locale_names, $lang);
    }

    // If the locale name doesn't match POSIX style, just include it as-is.
    if (!in_array($locale, $locale_names))
      array_push($locale_names, $locale);
  }
  return $locale_names;
}

/**
 * Utility function to get a StreamReader for the given text domain.
 */
function _get_reader($domain=null, $category=5, $enable_cache=true) {
    global $text_domains, $default_domain, $LC_CATEGORIES;
    if (!isset($domain)) $domain = $default_domain;
    if (!isset($text_domains[$domain]->l10n)) {
        // get the current locale
        $locale = _setlocale(LC_MESSAGES, 0);
        $bound_path = isset($text_domains[$domain]->path) ?
          $text_domains[$domain]->path : './';
        $subpath = $LC_CATEGORIES[$category] ."/$domain.mo";

        $locale_names = get_list_of_locales($locale);
        $input = null;
        foreach ($locale_names as $locale) {
          $full_path = $bound_path . $locale . "/" . $subpath;
          if (file_exists($full_path)) {
            $input = new FileReader($full_path);
            break;
          }
        }

        if (!array_key_exists($domain, $text_domains)) {
          // Initialize an empty domain object.
          $text_domains[$domain] = new domain();
        }
        $text_domains[$domain]->l10n = new gettext_reader($input,
                                                          $enable_cache);
    }
    return $text_domains[$domain]->l10n;
}

/**
 * Returns whether we are using our emulated gettext API or PHP built-in one.
 */
function locale_emulation() {
    global $EMULATEGETTEXT;
    return $EMULATEGETTEXT;
}

/**
 * Checks if the current locale is supported on this system.
 */
function _check_locale_and_function($function=false) {
    global $EMULATEGETTEXT;
    if ($function and !function_exists($function))
        return false;
    return !$EMULATEGETTEXT;
}

/**
 * Get the codeset for the given domain.
 */
function _get_codeset($domain=null) {
    global $text_domains, $default_domain, $LC_CATEGORIES;
    if (!isset($domain)) $domain = $default_domain;
    return (isset($text_domains[$domain]->codeset))? $text_domains[$domain]->codeset : ini_get('mbstring.internal_encoding');
}

/**
 * Convert the given string to the encoding set by bind_textdomain_codeset.
 */
function _encode($text) {
  $target_encoding = _get_codeset();
  if (function_exists("mb_detect_encoding")) {
    $source_encoding = mb_detect_encoding($text);
    if ($source_encoding != $target_encoding)
      $text = mb_convert_encoding($text, $target_encoding, $source_encoding);
  }
  return $text;
}

// Custom implementation of the standard gettext related functions

/**
 * Returns passed in $locale, or environment variable $LANG if $locale == ''.
 */
function _get_default_locale($locale) {
  if ($locale == '') // emulate variable support
    return getenv('LANG');
  else
    return $locale;
}

/**
 * Sets a requested locale, if needed emulates it.
 */
function _setlocale($category, $locale) {
    global $CURRENTLOCALE, $EMULATEGETTEXT;
    if ($locale === 0) { // use === to differentiate between string "0"
        if ($CURRENTLOCALE != '')
            return $CURRENTLOCALE;
        else
            // obey LANG variable, maybe extend to support all of LC_* vars
            // even if we tried to read locale without setting it first
            return _setlocale($category, $CURRENTLOCALE);
    } else {
        if (function_exists('setlocale')) {
          $ret = setlocale($category, $locale);
          if (($locale == '' and !$ret) or // failed setting it by env
              ($locale != '' and $ret != $locale)) { // failed setting it
            // Failed setting it according to environment.
            $CURRENTLOCALE = _get_default_locale($locale);
            $EMULATEGETTEXT = 1;
          } else {
            $CURRENTLOCALE = $ret;
            $EMULATEGETTEXT = 0;
          }
        } else {
          // No function setlocale(), emulate it all.
          $CURRENTLOCALE = _get_default_locale($locale);
          $EMULATEGETTEXT = 1;
        }
        // Allow locale to be changed on the go for one translation domain.
        global $text_domains, $default_domain;
        if (array_key_exists($default_domain, $text_domains)) {
            unset($text_domains[$default_domain]->l10n);
        }
        return $CURRENTLOCALE;
    }
}

/**
 * Sets the path for a domain.
 */
function _bindtextdomain($domain, $path) {
    global $text_domains;
    // ensure $path ends with a slash ('/' should work for both, but lets still play nice)
    if (substr(php_uname(), 0, 7) == "Windows") {
      if ($path[strlen($path)-1] != '\\' and $path[strlen($path)-1] != '/')
        $path .= '\\';
    } else {
      if ($path[strlen($path)-1] != '/')
        $path .= '/';
    }
    if (!array_key_exists($domain, $text_domains)) {
      // Initialize an empty domain object.
      $text_domains[$domain] = new domain();
    }
    $text_domains[$domain]->path = $path;
}

/**
 * Specify the character encoding in which the messages from the DOMAIN message catalog will be returned.
 */
function _bind_textdomain_codeset($domain, $codeset) {
    global $text_domains;
    $text_domains[$domain]->codeset = $codeset;
}

/**
 * Sets the default domain.
 */
function _textdomain($domain) {
    global $default_domain;
    $default_domain = $domain;
}

/**
 * Lookup a message in the current domain.
 */
function _gettext($msgid) {
    $l10n = _get_reader();
    return _encode($l10n->translate($msgid));
}

/**
 * Alias for gettext.
 */
function __($msgid) {
    return _gettext($msgid);
}

/**
 * Plural version of gettext.
 */
function _ngettext($singular, $plural, $number) {
    $l10n = _get_reader();
    return _encode($l10n->ngettext($singular, $plural, $number));
}

/**
 * Override the current domain.
 */
function _dgettext($domain, $msgid) {
    $l10n = _get_reader($domain);
    return _encode($l10n->translate($msgid));
}

/**
 * Plural version of dgettext.
 */
function _dngettext($domain, $singular, $plural, $number) {
    $l10n = _get_reader($domain);
    return _encode($l10n->ngettext($singular, $plural, $number));
}

/**
 * Overrides the domain and category for a single lookup.
 */
function _dcgettext($domain, $msgid, $category) {
    $l10n = _get_reader($domain, $category);
    return _encode($l10n->translate($msgid));
}
/**
 * Plural version of dcgettext.
 */
function _dcngettext($domain, $singular, $plural, $number, $category) {
    $l10n = _get_reader($domain, $category);
    return _encode($l10n->ngettext($singular, $plural, $number));
}

/**
 * Context version of gettext.
 */
function _pgettext($context, $msgid) {
    $l10n = _get_reader();
    return _encode($l10n->pgettext($context, $msgid));
}

/**
 * Override the current domain in a context gettext call.
 */
function _dpgettext($domain, $context, $msgid) {
    $l10n = _get_reader($domain);
    return _encode($l10n->pgettext($context, $msgid));
}

/**
 * Overrides the domain and category for a single context-based lookup.
 */
function _dcpgettext($domain, $context, $msgid, $category) {
    $l10n = _get_reader($domain, $category);
    return _encode($l10n->pgettext($context, $msgid));
}

/**
 * Context version of ngettext.
 */
function _npgettext($context, $singular, $plural) {
    $l10n = _get_reader();
    return _encode($l10n->npgettext($context, $singular, $plural));
}

/**
 * Override the current domain in a context ngettext call.
 */
function _dnpgettext($domain, $context, $singular, $plural) {
    $l10n = _get_reader($domain);
    return _encode($l10n->npgettext($context, $singular, $plural));
}

/**
 * Overrides the domain and category for a plural context-based lookup.
 */
function _dcnpgettext($domain, $context, $singular, $plural, $category) {
    $l10n = _get_reader($domain, $category);
    return _encode($l10n->npgettext($context, $singular, $plural));
}

// Wrappers to use if the standard gettext functions are available,
// but the current locale is not supported by the system.
// Use the standard impl if the current locale is supported, use the
// custom impl otherwise.

function T_setlocale($category, $locale) {
    return _setlocale($category, $locale);
}

function T_bindtextdomain($domain, $path) {
    if (_check_locale_and_function()) return bindtextdomain($domain, $path);
    else return _bindtextdomain($domain, $path);
}
function T_bind_textdomain_codeset($domain, $codeset) {
    // bind_textdomain_codeset is available only in PHP 4.2.0+
    if (_check_locale_and_function('bind_textdomain_codeset'))
        return bind_textdomain_codeset($domain, $codeset);
    else return _bind_textdomain_codeset($domain, $codeset);
}
function T_textdomain($domain) {
    if (_check_locale_and_function()) return textdomain($domain);
    else return _textdomain($domain);
}
function T_gettext($msgid) {
    if (_check_locale_and_function()) return gettext($msgid);
    else return _gettext($msgid);
}
function T_($msgid) {
    if (_check_locale_and_function()) return _($msgid);
    return __($msgid);
}
function T_ngettext($singular, $plural, $number) {
    if (_check_locale_and_function())
        return ngettext($singular, $plural, $number);
    else return _ngettext($singular, $plural, $number);
}
function T_dgettext($domain, $msgid) {
    if (_check_locale_and_function()) return dgettext($domain, $msgid);
    else return _dgettext($domain, $msgid);
}
function T_dngettext($domain, $singular, $plural, $number) {
    if (_check_locale_and_function())
        return dngettext($domain, $singular, $plural, $number);
    else return _dngettext($domain, $singular, $plural, $number);
}
function T_dcgettext($domain, $msgid, $category) {
    if (_check_locale_and_function())
        return dcgettext($domain, $msgid, $category);
    else return _dcgettext($domain, $msgid, $category);
}
function T_dcngettext($domain, $singular, $plural, $number, $category) {
    if (_check_locale_and_function())
      return dcngettext($domain, $singular, $plural, $number, $category);
    else return _dcngettext($domain, $singular, $plural, $number, $category);
}

function T_pgettext($context, $msgid) {
  if (_check_locale_and_function('pgettext'))
      return pgettext($context, $msgid);
  else
      return _pgettext($context, $msgid);
}

function T_dpgettext($domain, $context, $msgid) {
  if (_check_locale_and_function('dpgettext'))
      return dpgettext($domain, $context, $msgid);
  else
      return _dpgettext($domain, $context, $msgid);
}

function T_dcpgettext($domain, $context, $msgid, $category) {
  if (_check_locale_and_function('dcpgettext'))
      return dcpgettext($domain, $context, $msgid, $category);
  else
      return _dcpgettext($domain, $context, $msgid, $category);
}

function T_npgettext($context, $singular, $plural, $number) {
    if (_check_locale_and_function('npgettext'))
        return npgettext($context, $singular, $plural, $number);
    else
        return _npgettext($context, $singular, $plural, $number);
}

function T_dnpgettext($domain, $context, $singular, $plural, $number) {
  if (_check_locale_and_function('dnpgettext'))
      return dnpgettext($domain, $context, $singular, $plural, $number);
  else
      return _dnpgettext($domain, $context, $singular, $plural, $number);
}

function T_dcnpgettext($domain, $context, $singular, $plural,
                       $number, $category) {
    if (_check_locale_and_function('dcnpgettext'))
        return dcnpgettext($domain, $context, $singular,
                           $plural, $number, $category);
    else
        return _dcnpgettext($domain, $context, $singular,
                            $plural, $number, $category);
}

// Wrappers used as a drop in replacement for the standard gettext functions

if (!function_exists('gettext')) {
    function bindtextdomain($domain, $path) {
        return _bindtextdomain($domain, $path);
    }
    function bind_textdomain_codeset($domain, $codeset) {
        return _bind_textdomain_codeset($domain, $codeset);
    }
    function textdomain($domain) {
        return _textdomain($domain);
    }
    function gettext($msgid) {
        return _gettext($msgid);
    }
    function _($msgid) {
        return __($msgid);
    }
    function ngettext($singular, $plural, $number) {
        return _ngettext($singular, $plural, $number);
    }
    function dgettext($domain, $msgid) {
        return _dgettext($domain, $msgid);
    }
    function dngettext($domain, $singular, $plural, $number) {
        return _dngettext($domain, $singular, $plural, $number);
    }
    function dcgettext($domain, $msgid, $category) {
        return _dcgettext($domain, $msgid, $category);
    }
    function dcngettext($domain, $singular, $plural, $number, $category) {
        return _dcngettext($domain, $singular, $plural, $number, $category);
    }
    function pgettext($context, $msgid) {
        return _pgettext($context, $msgid);
    }
    function npgettext($context, $singular, $plural, $number) {
        return _npgettext($context, $singular, $plural, $number);
    }
    function dpgettext($domain, $context, $msgid) {
        return _dpgettext($domain, $context, $msgid);
    }
    function dnpgettext($domain, $context, $singular, $plural, $number) {
        return _dnpgettext($domain, $context, $singular, $plural, $number);
    }
    function dcpgettext($domain, $context, $msgid, $category) {
        return _dcpgettext($domain, $context, $msgid, $category);
    }
    function dcnpgettext($domain, $context, $singular, $plural,
                         $number, $category) {
      return _dcnpgettext($domain, $context, $singular, $plural,
                          $number, $category);
    }
}

?>


code:
<?php
/*
   Copyright (c) 2003, 2009 Danilo Segan <danilo@kvota.net>.
   Copyright (c) 2005 Nico Kaiser <nico@siriux.net>

   This file is part of PHP-gettext.

   PHP-gettext is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   PHP-gettext is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with PHP-gettext; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

/**
 * Provides a simple gettext replacement that works independently from
 * the system's gettext abilities.
 * It can read MO files and use them for translating strings.
 * The files are passed to gettext_reader as a Stream (see streams.php)
 *
 * This version has the ability to cache all strings and translations to
 * speed up the string lookup.
 * While the cache is enabled by default, it can be switched off with the
 * second parameter in the constructor (e.g. whenusing very large MO files
 * that you don't want to keep in memory)
 */
class gettext_reader
{
    //public:
   public $error = 0; // public variable that holds error code (0 if no error)

   //private:
  public $BYTEORDER = 0;        // 0: low endian, 1: big endian
  public $STREAM = null;
    public $short_circuit = false;
    public $enable_cache = false;
    public $originals = null;      // offset of original table
  public $translations = null;    // offset of translation table
  public $pluralheader = null;    // cache header field for plural forms
  public $total = 0;          // total string count
  public $table_originals = null;  // table for original strings (offsets)
  public $table_translations = null;  // table for translated strings (offsets)
  public $cache_translations = null;  // original -> translation mapping

  /* Methods */

    /**
     * Reads a 32bit Integer from the Stream
     *
     * @access private
     * @return Integer from the Stream
     */
    public function readint()
    {
        if ($this->BYTEORDER == 0) {
            // low endian
            $input=unpack('V', $this->STREAM->read(4));
            return array_shift($input);
        } else {
            // big endian
            $input=unpack('N', $this->STREAM->read(4));
            return array_shift($input);
        }
    }

    public function read($bytes)
    {
        return $this->STREAM->read($bytes);
    }

    /**
     * Reads an array of Integers from the Stream
     *
     * @param int count How many elements should be read
     * @return Array of Integers
     */
    public function readintarray($count)
    {
        if ($this->BYTEORDER == 0) {
            // low endian
            return unpack('V'.$count, $this->STREAM->read(4 * $count));
        } else {
            // big endian
            return unpack('N'.$count, $this->STREAM->read(4 * $count));
        }
    }

    /**
     * Constructor
     *
     * @param object Reader the StreamReader object
     * @param boolean enable_cache Enable or disable caching of strings (default on)
     */
    public function gettext_reader($Reader, $enable_cache = true)
    {
        // If there isn't a StreamReader, turn on short circuit mode.
        if (! $Reader || isset($Reader->error)) {
            $this->short_circuit = true;
            return;
        }

        // Caching can be turned off
        $this->enable_cache = $enable_cache;

        $MAGIC1 = "\x95\x04\x12\xde";
        $MAGIC2 = "\xde\x12\x04\x95";

        $this->STREAM = $Reader;
        $magic = $this->read(4);
        if ($magic == $MAGIC1) {
            $this->BYTEORDER = 1;
        } elseif ($magic == $MAGIC2) {
            $this->BYTEORDER = 0;
        } else {
            $this->error = 1; // not MO file
            return false;
        }

        // FIXME: Do we care about revision? We should.
        $revision = $this->readint();

        $this->total = $this->readint();
        $this->originals = $this->readint();
        $this->translations = $this->readint();
    }

    /**
     * Loads the translation tables from the MO file into the cache
     * If caching is enabled, also loads all strings into a cache
     * to speed up translation lookups
     *
     * @access private
     */
    public function load_tables()
    {
        if (is_array($this->cache_translations) &&
      is_array($this->table_originals) &&
      is_array($this->table_translations)) {
            return;
        }

        /* get original and translations tables */
        if (!is_array($this->table_originals)) {
            $this->STREAM->seekto($this->originals);
            $this->table_originals = $this->readintarray($this->total * 2);
        }
        if (!is_array($this->table_translations)) {
            $this->STREAM->seekto($this->translations);
            $this->table_translations = $this->readintarray($this->total * 2);
        }

        if ($this->enable_cache) {
            $this->cache_translations = array();
            /* read all strings in the cache */
            for ($i = 0; $i < $this->total; $i++) {
                $this->STREAM->seekto($this->table_originals[$i * 2 + 2]);
                $original = $this->STREAM->read($this->table_originals[$i * 2 + 1]);
                $this->STREAM->seekto($this->table_translations[$i * 2 + 2]);
                $translation = $this->STREAM->read($this->table_translations[$i * 2 + 1]);
                $this->cache_translations[$original] = $translation;
            }
        }
    }

    /**
     * Returns a string from the "originals" table
     *
     * @access private
     * @param int num Offset number of original string
     * @return string Requested string if found, otherwise ''
     */
    public function get_original_string($num)
    {
        $length = $this->table_originals[$num * 2 + 1];
        $offset = $this->table_originals[$num * 2 + 2];
        if (! $length) {
            return '';
        }
        $this->STREAM->seekto($offset);
        $data = $this->STREAM->read($length);
        return (string)$data;
    }

    /**
     * Returns a string from the "translations" table
     *
     * @access private
     * @param int num Offset number of original string
     * @return string Requested string if found, otherwise ''
     */
    public function get_translation_string($num)
    {
        $length = $this->table_translations[$num * 2 + 1];
        $offset = $this->table_translations[$num * 2 + 2];
        if (! $length) {
            return '';
        }
        $this->STREAM->seekto($offset);
        $data = $this->STREAM->read($length);
        return (string)$data;
    }

    /**
     * Binary search for string
     *
     * @access private
     * @param string string
     * @param int start (internally used in recursive function)
     * @param int end (internally used in recursive function)
     * @return int string number (offset in originals table)
     */
    public function find_string($string, $start = -1, $end = -1)
    {
        if (($start == -1) or ($end == -1)) {
            // find_string is called with only one parameter, set start end end
            $start = 0;
            $end = $this->total;
        }
        if (abs($start - $end) <= 1) {
            // We're done, now we either found the string, or it doesn't exist
            $txt = $this->get_original_string($start);
            if ($string == $txt) {
                return $start;
            } else {
                return -1;
            }
        } elseif ($start > $end) {
            // start > end -> turn around and start over
            return $this->find_string($string, $end, $start);
        } else {
            // Divide table in two parts
            $half = (int)(($start + $end) / 2);
            $cmp = strcmp($string, $this->get_original_string($half));
            if ($cmp == 0) {
                // string is exactly in the middle => return it
                return $half;
            } elseif ($cmp < 0) {
                // The string is in the upper half
                return $this->find_string($string, $start, $half);
            } else {
                // The string is in the lower half
                return $this->find_string($string, $half, $end);
            }
        }
    }

    /**
     * Translates a string
     *
     * @access public
     * @param string string to be translated
     * @return string translated string (or original, if not found)
     */
    public function translate($string)
    {
        if ($this->short_circuit) {
            return $string;
        }
        $this->load_tables();

        if ($this->enable_cache) {
            // Caching enabled, get translated string from cache
            if (array_key_exists($string, $this->cache_translations)) {
                return $this->cache_translations[$string];
            } else {
                return $string;
            }
        } else {
            // Caching not enabled, try to find string
            $num = $this->find_string($string);
            if ($num == -1) {
                return $string;
            } else {
                return $this->get_translation_string($num);
            }
        }
    }

    /**
     * Sanitize plural form expression for use in PHP eval call.
     *
     * @access private
     * @return string sanitized plural form expression
     */
    public function sanitize_plural_expression($expr)
    {
        // Get rid of disallowed characters.
        $expr = preg_replace('@[^a-zA-Z0-9_:;\(\)\?\|\&=!<>+*/\%-]@', '', $expr);

        // Add parenthesis for tertiary '?' operator.
        $expr .= ';';
        $res = '';
        $p = 0;
        for ($i = 0; $i < strlen($expr); $i++) {
            $ch = $expr[$i];
            switch ($ch) {
      case '?':
        $res .= ' ? (';
        $p++;
        break;
      case ':':
        $res .= ') : (';
        break;
      case ';':
        $res .= str_repeat(')', $p) . ';';
        $p = 0;
        break;
      default:
        $res .= $ch;
      }
        }
        return $res;
    }

    /**
     * Parse full PO header and extract only plural forms line.
     *
     * @access private
     * @return string verbatim plural form header field
     */
    public function extract_plural_forms_header_from_po_header($header)
    {
        if (preg_match("/(^|\n)plural-forms: ([^\n]*)\n/i", $header, $regs)) {
            $expr = $regs[2];
        } else {
            $expr = "nplurals=2; plural=n == 1 ? 0 : 1;";
        }
        return $expr;
    }

    /**
     * Get possible plural forms from MO header
     *
     * @access private
     * @return string plural form header
     */
    public function get_plural_forms()
    {
        // lets assume message number 0 is header
        // this is true, right?
        $this->load_tables();

        // cache header field for plural forms
        if (! is_string($this->pluralheader)) {
            if ($this->enable_cache) {
                $header = $this->cache_translations[""];
            } else {
                $header = $this->get_translation_string(0);
            }
            $expr = $this->extract_plural_forms_header_from_po_header($header);
            $this->pluralheader = $this->sanitize_plural_expression($expr);
        }
        return $this->pluralheader;
    }

    /**
     * Detects which plural form to take
     *
     * @access private
     * @param n count
     * @return int array index of the right plural form
     */
    public function select_string($n)
    {
        if (!is_int($n)) {
            throw new InvalidArgumentException(
          "Select_string only accepts integers: " . $n
      );
        }
        $string = $this->get_plural_forms();
        $string = str_replace('nplurals', "\$total", $string);
        $string = str_replace("n", $n, $string);
        $string = str_replace('plural', "\$plural", $string);

        $total = 0;
        $plural = 0;

        eval("$string");
        if ($plural >= $total) {
            $plural = $total - 1;
        }
        return $plural;
    }

    /**
     * Plural version of gettext
     *
     * @access public
     * @param string single
     * @param string plural
     * @param string number
     * @return translated plural form
     */
    public function ngettext($single, $plural, $number)
    {
        if ($this->short_circuit) {
            if ($number != 1) {
                return $plural;
            } else {
                return $single;
            }
        }

        // find out the appropriate form
        $select = $this->select_string($number);

        // this should contains all strings separated by NULLs
        $key = $single . chr(0) . $plural;

        if ($this->enable_cache) {
            if (! array_key_exists($key, $this->cache_translations)) {
                return ($number != 1) ? $plural : $single;
            } else {
                $result = $this->cache_translations[$key];
                $list = explode(chr(0), $result);
                return $list[$select];
            }
        } else {
            $num = $this->find_string($key);
            if ($num == -1) {
                return ($number != 1) ? $plural : $single;
            } else {
                $result = $this->get_translation_string($num);
                $list = explode(chr(0), $result);
                return $list[$select];
            }
        }
    }

    public function pgettext($context, $msgid)
    {
        $key = $context . chr(4) . $msgid;
        $ret = $this->translate($key);
        if (strpos($ret, "\004") !== false) {
            return $msgid;
        } else {
            return $ret;
        }
    }

    public function npgettext($context, $singular, $plural, $number)
    {
        $key = $context . chr(4) . $singular;
        $ret = $this->ngettext($key, $plural, $number);
        if (strpos($ret, "\004") !== false) {
            return $singular;
        } else {
            return $ret;
        }
    }
}


code:
<?php
/*
   Copyright (c) 2003, 2005, 2006, 2009 Danilo Segan <danilo@kvota.net>.

   This file is part of PHP-gettext.

   PHP-gettext is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   PHP-gettext is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with PHP-gettext; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

  // Simple class to wrap file streams, string streams, etc.
  // seek is essential, and it should be byte stream
class StreamReader
{
    // should return a string [FIXME: perhaps return array of bytes?]
    public function read($bytes)
    {
        return false;
    }

    // should return new position
    public function seekto($position)
    {
        return false;
    }

    // returns current position
    public function currentpos()
    {
        return false;
    }

    // returns length of entire stream (limit for seekto()s)
    public function length()
    {
        return false;
    }
};

class StringReader
{
    public $_pos;
    public $_str;

    public function StringReader($str='')
    {
        $this->_str = $str;
        $this->_pos = 0;
    }

    public function read($bytes)
    {
        $data = substr($this->_str, $this->_pos, $bytes);
        $this->_pos += $bytes;
        if (strlen($this->_str)<$this->_pos) {
            $this->_pos = strlen($this->_str);
        }

        return $data;
    }

    public function seekto($pos)
    {
        $this->_pos = $pos;
        if (strlen($this->_str)<$this->_pos) {
            $this->_pos = strlen($this->_str);
        }
        return $this->_pos;
    }

    public function currentpos()
    {
        return $this->_pos;
    }

    public function length()
    {
        return strlen($this->_str);
    }
};

class FileReader
{
    public $_pos;
    public $_fd;
    public $_length;

    public function FileReader($filename)
    {
        if (file_exists($filename)) {
            $this->_length=filesize($filename);
            $this->_pos = 0;
            $this->_fd = fopen($filename, 'rb');
            if (!$this->_fd) {
                $this->error = 3; // Cannot read file, probably permissions
                return false;
            }
        } else {
            $this->error = 2; // File doesn't exist
            return false;
        }
    }

    public function read($bytes)
    {
        if ($bytes) {
            fseek($this->_fd, $this->_pos);

            // PHP 5.1.1 does not read more than 8192 bytes in one fread()
            // the discussions at PHP Bugs suggest it's the intended behaviour
            $data = '';
            while ($bytes > 0) {
                $chunk  = fread($this->_fd, $bytes);
                $data  .= $chunk;
                $bytes -= strlen($chunk);
            }
            $this->_pos = ftell($this->_fd);

            return $data;
        } else {
            return '';
        }
    }

    public function seekto($pos)
    {
        fseek($this->_fd, $pos);
        $this->_pos = ftell($this->_fd);
        return $this->_pos;
    }

    public function currentpos()
    {
        return $this->_pos;
    }

    public function length()
    {
        return $this->_length;
    }

    public function close()
    {
        fclose($this->_fd);
    }
};

// Preloads entire file in memory first, then creates a StringReader
// over it (it assumes knowledge of StringReader internals)
class CachedFileReader extends StringReader
{
    public function CachedFileReader($filename)
    {
        if (file_exists($filename)) {
            $length=filesize($filename);
            $fd = fopen($filename, 'rb');

            if (!$fd) {
                $this->error = 3; // Cannot read file, probably permissions
                return false;
            }
            $this->_str = fread($fd, $length);
            fclose($fd);
        } else {
            $this->error = 2; // File doesn't exist
            return false;
        }
    }
};


code:
<?php
require_once('gettext.inc');

class LocaleTest extends PHPUnit_Framework_TestCase
{
    public function test_setlocale()
    {
        putenv("LC_ALL=");
        // _setlocale defaults to a locale name from environment variable LANG.
        putenv("LANG=sr_RS");
        $this->assertEquals('sr_RS', _setlocale(LC_MESSAGES, 0));
    }

    public function test_setlocale_system()
    {
        putenv("LC_ALL=");
        // For an existing locale, it never needs emulation.
        putenv("LANG=C");
        _setlocale(LC_MESSAGES, "");
        $this->assertEquals(0, locale_emulation());
    }

    public function test_setlocale_emulation()
    {
        putenv("LC_ALL=");
        // If we set it to a non-existent locale, it still works, but uses
        // emulation.
        _setlocale(LC_MESSAGES, "xxx_XXX");
        $this->assertEquals('xxx_XXX', _setlocale(LC_MESSAGES, 0));
        $this->assertEquals(1, locale_emulation());
    }

    public function test_get_list_of_locales()
    {
        // For a locale containing country code, we prefer
        // full locale name, but if that's not found, fall back
        // to the language only locale name.
        $this->assertEquals(
        array("sr_RS", "sr"),
        get_list_of_locales("sr_RS")
    );

        // If language code is used, it's the only thing returned.
        $this->assertEquals(
        array("sr"),
        get_list_of_locales("sr")
    );

        // There is support for language and charset only.
        $this->assertEquals(
        array("sr.UTF-8", "sr"),
        get_list_of_locales("sr.UTF-8")
    );

        // It can also split out character set from the full locale name.
        $this->assertEquals(
        array("sr_RS.UTF-8", "sr_RS", "sr"),
        get_list_of_locales("sr_RS.UTF-8")
    );

        // There is support for @modifier in locale names as well.
        $this->assertEquals(
        array("sr_RS.UTF-8@latin", "sr_RS@latin", "sr@latin",
                              "sr_RS.UTF-8", "sr_RS", "sr"),
        get_list_of_locales("sr_RS.UTF-8@latin")
    );

        // We can pass in only language and modifier.
        $this->assertEquals(
        array("sr@latin", "sr"),
        get_list_of_locales("sr@latin")
    );

        // If locale name is not following the regular POSIX pattern,
        // it's used verbatim.
        $this->assertEquals(
        array("something"),
        get_list_of_locales("something")
    );

        // Passing in an empty string returns an empty array.
        $this->assertEquals(
        array(),
        get_list_of_locales("")
    );
    }
}


code:
<?php

class ParsingTest extends PHPUnit_Framework_TestCase
{
    public function test_extract_plural_forms_header_from_po_header()
    {
        $parser = new gettext_reader(null);
        // It defaults to a "Western-style" plural header.
        $this->assertEquals(
        'nplurals=2; plural=n == 1 ? 0 : 1;',
        $parser->extract_plural_forms_header_from_po_header("")
    );

        // Extracting it from the middle of the header works.
        $this->assertEquals(
        'nplurals=1; plural=0;',
        $parser->extract_plural_forms_header_from_po_header(
          "Content-type: text/html; charset=UTF-8\n"
        ."Plural-Forms: nplurals=1; plural=0;\n"
        ."Last-Translator: nobody\n"
      )
    );

        // It's also case-insensitive.
        $this->assertEquals(
        'nplurals=1; plural=0;',
        $parser->extract_plural_forms_header_from_po_header(
          "PLURAL-forms: nplurals=1; plural=0;\n"
      )
    );

        // It falls back to default if it's not on a separate line.
        $this->assertEquals(
        'nplurals=2; plural=n == 1 ? 0 : 1;',
        $parser->extract_plural_forms_header_from_po_header(
          "Content-type: text/html; charset=UTF-8" // note the missing \n here
        ."Plural-Forms: nplurals=1; plural=0;\n"
        ."Last-Translator: nobody\n"
      )
    );
    }

    /**
     * @expectedException InvalidArgumentException
     */
    public function test_select_string_disallows_nonint_numbers()
    {
        $pofile_data = ''
      ."msgid \"\"\n"
      ."msgstr \"\"\n"
      ."\"Content-Type: text/plain; charset=utf-8\\n\"\n"
      ."\"Plural-Forms: nplurals=2; plural= n == 1 ? 0 : 1;\\n\"\n";
        $mofile = tempnam(sys_get_temp_dir(), "pg");
        $msgfmt = popen("msgfmt -o $mofile -", "w");
        fwrite($msgfmt, $pofile_data);
        pclose($msgfmt);

        $modata = new CachedFileReader($mofile);
        unlink($mofile);
        $parser = new gettext_reader($modata);
        // It defaults to a "Western-style" plural header.
        $this->assertEquals(
        'nplurals=2; plural=n == 1 ? 0 : 1;',
        $parser->extract_plural_forms_header_from_po_header("")
    );

        $new_tempfile = tempnam(sys_get_temp_dir(), "pg");
        $parser->select_string(
        "(file_put_contents('$new_tempfile', 'boom'))"
    );

        $this->assertEquals("", file_get_contents($new_tempfile));
        unlink($new_tempfile);
    }

    /**
     * @dataProvider data_provider_test_npgettext
     */
    public function test_npgettext($number, $expected)
    {
        $parser = new gettext_reader(null);
        $result = $parser->npgettext(
        "context",
        "%d pig went to the market\n",
        "%d pigs went to the market\n",
        $number
    );
        $this->assertSame($expected, $result);
    }
    public static function data_provider_test_npgettext()
    {
        return array(
                 array(1, "%d pig went to the market\n"),
                 array(2, "%d pigs went to the market\n"),
                 );
    }
}