在PHP中使用Google Translate

今天需要在做一个内置的翻译功能，然后找了半天，一直没看到合适的方法，
网络上基本上都是同样一个有问题的代码，于是下面找到一个可以用的代码。
直接file_get_contents取API，然后正则表达式取需要的那部分。

/**
* Translating language with Google API
* @author gabe@fijiwebdesign.com
* @version $id$
* @license – Share-Alike 3.0 (http://creativecommons.org/licenses/by-sa/3.0/)
*
* Google requires attribution for their Language API, please see: http://code.google.com/apis/ajaxlanguage/documentation/#Branding
*
*/
class Google_Translate_API {

/**
* Translate a piece of text with the Google Translate API
* @return String
* @param $text String
* @param $from String[optional] Original language of $text. An empty String will let google decide the language of origin
* @param $to String[optional] Language to translate $text to
*/
static function translate($text, $from = ”, $to = ‘en’) {
$url = ‘http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=’.rawurlencode($text).’&langpair=’.rawurlencode($from.’|’.$to);
$response = file_get_contents(
$url,
null,
stream_context_create(
array(
‘http’=>array(
‘method’=>”GET”,
‘header’=>”Referer: http://”.$_SERVER[‘HTTP_HOST’].”/\r\n”
)
)
)
);
if (preg_match(“/{\”translatedText\”:\”([^\”]+)\”/i”, $response, $matches)) {
return self::_unescapeUTF8EscapeSeq($matches[1]);
}
return false;
}

/**
* Convert UTF-8 Escape sequences in a string to UTF-8 Bytes
* @return UTF-8 String
* @param $str String
*/
static function _unescapeUTF8EscapeSeq($str) {
return preg_replace_callback(“/\\\u([0-9a-f]{4})/i”, create_function(‘$matches’, ‘return html_entity_decode(\’&#x\’.$matches[1].\’;\’, ENT_NOQUOTES, \’UTF-8\’);’), $str);
}
}

// example usage
$text = ‘570話ベースで鷹鰐・ダズワニネタが１本ずつです。smdcn.net’;
$trans_text = Google_Translate_API::translate($text, ‘ja’, ‘zh-cn’);
if ($trans_text !== false) {
echo $trans_text;