< ?php
/**
 * Google翻译的API
 */
class Google_translate_API
{
	public  $out = "";
	public  $text = "";
	public $opts = array("text" => "", "language_pair" => "");
	function setValues($text,$fromLanguage,$toLanguage)
	{
		if($text != "")
		$this->opts["text"] = $text;
		if($fromLanguage != "" && $toLanguage != "")
		$this->opts["language_pair"] = $fromLanguage."|".$toLanguage;
	}
	function translate()
	{
		$this->out = "";
		if (strlen($this->opts['text']) >  500)
		{
			$str1 = cSubStr($this->opts['text'],0,480);
			$str2 = cSubStr($this->opts['text'],480,(strlen($this->opts['text']-480)));
			$google_translator_url1 = "http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=".urlencode($str1)."&langpair=".urlencode($this->opts['language_pair'])."";
			$google_translator_url2 = "http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=".urlencode($str2)."&langpair=".urlencode($this->opts['language_pair'])."";
			$response1 = $this->postPage(array("url" => $google_translator_url1));
			$response2 = $this->postPage(array("url" => $google_translator_url2));
			$resValues = $response1['responseData']['translatedText'].$response2['responseData']['translatedText'];
		}
		else
		{
			$google_translator_url = "http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=".urlencode($this->opts['text'])."&langpair=".urlencode($this->opts['language_pair'])."";

			$response = $this->postPage(array("url" => $google_translator_url));
			$resValues = $response['responseData']['translatedText'];
		}

		$this->out = $resValues;

		return $this->out;
	}
	function postPage($opts)
	{
		$response = "";
		if($opts["url"] != "") {
			$ch = curl_init($opts["url"]);
			curl_setopt($ch, CURLOPT_HEADER, 0);
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
			$response = curl_exec($ch);
			if(curl_errno($ch))
			$response = "";
			curl_close($ch);
			$decoded = json_decode( $response, true );
		}
		return $decoded;
	}
}

?>

API发送给翻译的字符串不能大于500个字符长度。

用法：

< ?php
$tran = Google_translate_API();

$tran->setValues("China","en","zh-CN");  //第一个参数为要翻译的文字，第二、三个参数分别为原语言和翻译后语言

$res = $tran->translate();

echo $res;
?>