File Source for KeySwap.php

<?php
/**
* ----------------------------------------------------------------------
*
* Copyright (c) 2006-2013 Khaled Al-Sham'aa.
*
* http://www.ar-php.org
*
* PHP Version 5
*
* ----------------------------------------------------------------------
*
* LICENSE
*
* This program is open source product; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License (LGPL)
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/lgpl.txt>.
*
* ----------------------------------------------------------------------
*
* Class Name: Arabic Keyboard Swapping Language
*
* Filename: KeySwap.php
*
* Original Author(s): Khaled Al-Sham'aa <khaled@ar-php.org>
*
* Purpose: Convert keyboard language programmatically (English - Arabic)
*
* ----------------------------------------------------------------------
*
* Arabic Keyboard Swapping Language
*
* PHP class to convert keyboard language between English and Arabic
* programmatically. This function can be helpful in dual language forms when
* users miss change keyboard language while they are entering data.
*
* If you wrote an Arabic sentence while your keyboard stays in English mode by
* mistake, you will get a non-sense English text on your PC screen. In that case
* you can use this class to make a kind of magic conversion to swap that odd text
* by original Arabic sentence you meant when you type on your keyboard.
*
* Please note that magic conversion in the opposite direction (if you type English
* sentences while your keyboard stays in Arabic mode) is also available in this
* class, but it is not reliable as much as previous case because in Arabic keyboard
* we have some keys provide a shortcut to type two chars in one click (those keys
* include: b, B, G and T).
*
* Well, we try in this class to come over this issue by suppose that user used
* optimum way by using shortcut keys when available instead of assemble chars using
* stand alone keys, but if (s)he does not then you may have some typo chars in
* converted text.
*
* Example:
* <code>
* include('./I18N/Arabic.php');
* $obj = new I18N_Arabic('KeySwap');
*
* $str = "Hpf lk hgkhs hglj'vtdkK Hpf hg`dk dldg,k f;gdjil Ygn ,p]hkdm ...";
*
* echo "Before: $str ";
*
* $text = $obj->swap_ea($str);
*
* echo "After: $text ";
* </code>
*
* @category I18N
* @package I18N_Arabic
* @author Khaled Al-Sham'aa <khaled@ar-php.org>
* @copyright 2006-2013 Khaled Al-Sham'aa
*
* @license LGPL <http://www.gnu.org/licenses/lgpl.txt>
* @link http://www.ar-php.org
*/
// New in PHP V5.3: Namespaces
// namespace I18N\Arabic;
//
// $obj = new I18N\Arabic\KeySwap();
//
// use I18N\Arabic;
// $obj = new Arabic\KeySwap();
//
// use I18N\Arabic\KeySwap as KeySwap;
// $obj = new KeySwap();
/**
* This PHP class convert keyboard language programmatically (English - Arabic)
*
* @category I18N
* @package I18N_Arabic
* @author Khaled Al-Sham'aa <khaled@ar-php.org>
* @copyright 2006-2013 Khaled Al-Sham'aa
*
* @license LGPL <http://www.gnu.org/licenses/lgpl.txt>
* @link http://www.ar-php.org
*/
class I18N_Arabic_KeySwap
{
// First 12 chars replaced by 1 Byte in Arabic keyboard
// while rest replaced by 2 Bytes UTF8
private static $_swapEn = '{}DFL:"ZCV<>`qwertyuiop[]asdfghjkl;\'zxcvnm,./~QWERYIOPASHJKXN?M';
private static $_swapAr = '<>][/:"~}{,.ذضصثقفغعهخحجدشسيبلاتنمكطئءؤرىةوزظًٌَُّإ÷×؛ٍِأـ،ْآ؟’';
private static $_swapFr = '²azertyuiop^$qsdfghjklmù*<wxcvn,;:!²1234567890°+AZERYIOP¨£QSDFHJKLM%µ<WXCVN?./§';
private static $_swapArAzerty = '>ضصثقفغعهخحجدشسيبلاتنمكطذ\\ئءؤرىةوزظ>&é"\'(-è_çà)=ضصثقغهخحجدشسيباتنمكطذ\\ئءؤرىةوزظ';
private $_transliteration = array();
/**
* Loads initialize values
*
* @ignore
*/
public function __construct()
{
$xml = simplexml_load_file(dirname(__FILE__).'/data/charset/arabizi.xml');
foreach ($xml->transliteration->item as $item) {
$index = $item['id'];
$this->_transliteration["$index"] = (string)$item;
}
}
/**
* Make conversion to swap that odd Arabic text by original English sentence
* you meant when you type on your keyboard (if keyboard language was
* incorrect)
*
* @param string $text Odd Arabic string
*
* @return string Normal English string
* @author Khaled Al-Sham'aa
*/
public static function swapAe($text)
{
$output = '';
$text = stripslashes($text);
$text = str_replace('لا', 'b', $text);
$text = str_replace('لآ', 'B', $text);
$text = str_replace('لأ', 'G', $text);
$text = str_replace('لإ', 'T', $text);
$text = str_replace('‘', 'U', $text);
$max = strlen($text);
for ($i=0; $i<$max; $i++) {
$pos = strpos(self::$_swapAr, $text[$i]);
if ($pos === false) {
$output .= $text[$i];
} else {
$pos2 = strpos(self::$_swapAr, $text[$i].$text[$i+1]);
if ($pos2 !== false) {
$pos = $pos2;
$i++;
}
if ($pos < 12) {
$adjPos = $pos;
} else {
$adjPos = ($pos - 12)/2 + 12;
}
$output .= substr(self::$_swapEn, $adjPos, 1);
}
}
return $output;
}
/**
* Make conversion to swap that odd English text by original Arabic sentence
* you meant when you type on your keyboard (if keyboard language was
* incorrect)
*
* @param string $text Odd English string
*
* @return string Normal Arabic string
* @author Khaled Al-Sham'aa
*/
public static function swapEa($text)
{
$output = '';
$text = stripslashes($text);
$text = str_replace('b', 'لا', $text);
$text = str_replace('B', 'لآ', $text);
$text = str_replace('G', 'لأ', $text);
$text = str_replace('T', 'لإ', $text);
$text = str_replace('U', '‘', $text);
$max = strlen($text);
for ($i=0; $i<$max; $i++) {
$pos = strpos(self::$_swapEn, $text[$i]);
if ($pos === false) {
$output .= $text[$i];
} else {
if ($pos < 12) {
$adjPos = $pos;
$len = 1;
} else {
$adjPos = ($pos - 12)*2 + 12;
$len = 2;
}
if ($adjPos == 112) {
$len = 3;
}
$output .= substr(self::$_swapAr, $adjPos, $len);
}
}
return $output;
}
}

Source for file KeySwap.php