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<?php
class GoogleTranslate
{
var $languages = NUll; //array to store valid languages
var $validTranslation = null; //array to store valid lang-lang translation
var $langFrom = null; //language converting from
var $langTo = null; //language conveting to
var $text = null; //text to translate
var $google_url = null; //where we get the service from
var $post_data = null;
function __construct($langFrom, $langTo, $text)
{
$this->google_url = "http://translate.google.com/translate_t";
$this->langFrom = $langFrom;
$this->langTo = $langTo;
$this->text = $text; //text to translate to
$this->languages = array( //elligable languages (I've only included common Euro langs
"en" =>"english",
"de" =>"german",
"fr" =>"french",
"es" =>"spanish", "it" =>"italian", "vi" =>"vietnamese");
/* these are the conversions allowed, I've only included
* common Euro languages
*/
$this->validTranslations = array(
"en|de", //English to German
"en|fr", //English to French
"en|it", //English to Italian
"en|es",
"en|vi", //English to Spanish
"de|en", //German to English
"de|fr", //German to French
"fr|en", //French to English
"fr|de", //French to German
"it|en",
"vi|en", //Italian to English
"es|en");
$post_data = array('langpair' =>null, 'text' =>null);
} //constructor
/*returnLanguageTo() will return the lanaguage that has currently been set
*to translate TO
*preconditions:- contructor has been called
*postconditions:- none
*returns: - the language that has been set to translate to, and null if none have been set
*/
function returnLanguageTo ()
{
return $this->langTo;
}
/*returnLanguageFrom() will return the lanaguage that has currently been set
*to translate FROM
*preconditions:- contructor has been called
*postconditions:- none
*returns: - the language that has been set to translate FROM, and null if none have been set
*/
function returnLanguageFrom ()
{
return $this->langFrom;
}
/*setLanguageTo() will set the lanaguage to translate TO
*
*preconditions:- none
*postconditions:- the language to be translated to will be set to $langT
*returns: - returns -1 on failure if the language is not valid, else 1
*/
function setLanguageTo ($langT)
{
$this->langTo = $langT;
}
/*setLanguageFrom() will set the lanaguage to translate FROM
*
*preconditions:- none
*postconditions:- the language to be translated FROM will be set to $langF
*returns: - returns -1 on failure if the language is not valid, else 1
*/
function setLanguageFrom ($langF)
{
$this->langFrom = $langF;
}
/*setText() sets the text to be translated
*preconditions: none
*postconditions: sets the text to be translated to $text
*returns: n/a
*/
function setText ($text)
{
$this->text = $text;
}
function validateLang ($langPair)
{
if (!in_array($langPair,$this->validTranslations))
{
return -1;
}
return 1;
}
/*translate will take the language from, language to, and text variable already initialised
* and return the translated text
*preconditions:- $this->languageFrom, $this->languageTo, $this->text have already been
*initialised
*postcoditions:-none
*returns:- the translated text
*/
function translate ()
{
$i = $this->langFrom."|".$this->langTo;
if ($this->validateLang ($i) < 0) die ("Error, could not translate");
$this->post_data['langpair'] = $i;
$query = $this->buildQuery ();
$ch = curl_init ();
curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt ($ch, CURLOPT_COOKIEJAR, "cookie");
curl_setopt ($ch, CURLOPT_COOKIEFILE, "cookie");
curl_setopt ($ch, CURLOPT_URL, $this->google_url);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_POST, 0);
curl_setopt ($ch, CURLOPT_POSTFIELDS, $query);
$output = curl_exec ($ch);
$processedOutput = $this->filterOutput ($output);
return $processedOutput;
} //translate()
/*processOutput() takes the source page of a request to google translate and filters it for
* the translated words
*preconditions:- $output is valid source from googles translate service
*postconditions:- none
*returns:- the translated words we are looking for
*/
function filterOutput ($output)
{
$search_regex = '/<span id=result_box class="(.+?)_text">(.+?)<\/span><\/span>/';
$result = preg_match ($search_regex, $output, $match);
$match[0] = str_replace (" ", "", $match[0]);
//this gets rid of the HTML no break spaces
return strip_tags ($match[0]);
// return $output;
} //filterOutput()
/*buildQuery() will take the already initialised values of languageFrom, languageTo and text
*to be translated, and puts them into a format which can be submitted as a request
*to the google translating service
*/
function buildQuery ()
{
if (($this->langTo || $this->langFrom || $this->text) == ("" || null)) die ("Please set language to, language from, and the text to be translated");
$this->post_data['text'] = $this->text; //set the text of what we want to translate
return http_build_query ($this->post_data); //create proper HTML query
} //buildQuery()
} //GoogleTranslate
?>