Mijn Oplossing

Ik ben aan het zoeken geslagen en kwam een stuk code tegen welke mij wel aan stond.

Hoe werkt het
De functionaliteit is hetzelfde als gettext, echter is het niet afhankelijk van de module. Caching is mogelijk.

De code
Het script is object en functie gebaseerd en kan dus probleemloos geinclude worden. Zonder dat het iets doet.
Zoals je ziet, is de code niet van mijzelf, ik heb wat kleine modificaties aangebracht.

Code (php)
PHP script in nieuw venster Selecteer het PHP script
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<?php
// Global variable
$l10n = array();

/*
Copyright (c) 2003, 2005 Danilo Segan <[email protected]>.

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 StringReader {
    protected $_pos;
    protected $_str;

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

    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;
    }

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

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

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

}

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

    function __construct($filename) {
        if (file_exists($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;
        }
    }

    function read($bytes) {
        $data = '';
        if ($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
            while ($bytes > 0) {
                $chunk  = fread($this->_fd, $bytes);
                $data  .= $chunk;
                $bytes -= strlen($chunk);
            }
            $this->_pos = ftell($this->_fd);

            return $data;
        } else return '';
    }

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

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

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

    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 {
    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;
        }
    }
}



/*
Copyright (c) 2003 Danilo Segan <[email protected]>.
Copyright (c) 2005 Nico Kaiser <[email protected]>

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


    /* Methods */

    /**
     * Constructor
     *
     * @param object Reader the StreamReader object
     * @param boolean enable_cache Enable or disable caching of strings (default on)
     */
    function __construct($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 = (int)0x950412de; //bug in PHP 5.0.2, see https://savannah.nongnu.org/bugs/?func=detailitem&item_id=10565
        $MAGIC1 = (int) - 1794895138;
        // $MAGIC2 = (int)0xde120495; //bug
        $MAGIC2 = (int) - 569244523;
        // 64-bit fix
        $MAGIC3 = (int) 2500072158;

        $this->STREAM = $Reader;
        $magic = $this->readint();
        if ($magic == ($MAGIC1 & 0xFFFFFFFF) || $magic == ($MAGIC3 & 0xFFFFFFFF)) { // to make sure it works for 64-bit platforms
            $this->BYTEORDER = 0;
        } elseif ($magic == ($MAGIC2 & 0xFFFFFFFF)) {
            $this->BYTEORDER = 1;
        } 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();
    }

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

    /**
     * Reads an array of Integers from the Stream
     *
     * @param int count How many elements should be read
     * @return Array of Integers
     */
    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));
        }
    }

    /**
     * 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
     */
    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 */
        $this->STREAM->seekto($this->originals);
        $this->table_originals = $this->readintarray($this->total * 2);
        $this->STREAM->seekto($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 ''
     */
    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 ''
     */
    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)
     */
    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 $start;
            else
            return -1;
        } else if ($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 $half;
            else if ($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)
     */
    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);
        }
    }

    /**
     * Get possible plural forms from MO header
     *
     * @access private
     * @return string plural form header
     */
    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);
            }
            $header .= "\n"; //make sure our regex matches
            if (eregi("plural-forms: ([^\n]*)\n", $header, $regs))
            $expr = $regs[1];
            else
            $expr = "nplurals=2; plural=n == 1 ? 0 : 1;";

            // add parentheses
            // important since PHP's ternary evaluates from left to right
            $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;
                }
            }
            $this->pluralheader = $res;
        }

        return $this->pluralheader;
    }

    /**
     * Detects which plural form to take
     *
     * @access private
     * @param n count
     * @return int array index of the right plural form
     */
    function select_string($n) {
        if (is_null($this->select_string_function)) {
            $string = $this->get_plural_forms();
            if (preg_match("/nplurals\s*=\s*(\d+)\s*\;\s*plural\s*=\s*(.*?)\;+/", $string, $matches)) {
                $nplurals = $matches[1];
                $expression = $matches[2];
                $expression = str_replace("n", '$n', $expression);
            } else {
                $nplurals = 2;
                $expression = ' $n == 1 ? 0 : 1 ';
            }
            $func_body = "
                \$plural = ($expression);
                return (\$plural <= $nplurals)? \$plural : \$plural - 1;";
            $this->select_string_function = create_function('$n', $func_body);
        }
        return call_user_func($this->select_string_function, $n);
    }

    /**
     * Plural version of gettext
     *
     * @access public
     * @param string single
     * @param string plural
     * @param string number
     * @return translated plural form
     */
    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];
            }
        }
    }

}


function get_locale() {
    global $locale;

    if (isset($locale)){
        return $locale;
    }

    // WPLANG is defined in wp-config.
    if (defined('CONFIG_LANGUAGE')){
        $locale = CONFIG_LANGUAGE;
    }

    if (empty($locale)){
        $locale = '';
    }

    return $locale;
}

function translate($text, $domain) {
    global $l10n;

    if (isset($l10n[$domain])){
        return $l10n[$domain]->translate($text);
    }else{
        return $text;
    }
}

// Return a translated string.
function __($text, $domain = 'default') {
    return translate($text, $domain);
}

// Echo a translated string.
function _e($text, $domain = 'default') {
    echo translate($text, $domain);
}

function _c($text, $domain = 'default') {
    $whole = translate($text, $domain);
    $last_bar = strrpos($whole, '|');
    if ( false == $last_bar ) {
        return $whole;
    } else {
        return substr($whole, 0, $last_bar);
    }
}

// Return the plural form.
function __ngettext($single, $plural, $number, $domain = 'default') {
    global $l10n;

    if (isset($l10n[$domain])) {
        return $l10n[$domain]->ngettext($single, $plural, $number);
    } else {
        if ($number != 1)
        return $plural;
        else
        return $single;
    }
}

function load_textdomain($domain, $mofile) {
    global $l10n;

    if (isset($l10n[$domain])){
        return;
    }
    
    if ( is_readable($mofile)){
        $input = new CachedFileReader($mofile);
    }else{
        return;
    }

    $l10n[$domain] = new gettext_reader($input);
}

function load_default_textdomain() {
    global $l10n;

    $locale = get_locale();
    if ( empty($locale) ){
        $locale = CONFIG_LANGUAGE;
    }

    $mofile = CONFIG_FOLDER_LIBRARY . "language/$locale.mo";
    
    load_textdomain('default', $mofile);
}

?>

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