微信公众平台开发--谷歌翻译

1）Google翻译接口

2）微信调用

3）效果展示

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1）Google翻译接口

Google提供翻译的API接口,参见https://developers.google.com/translate/v2/getting_started

but

Google Translate API is a paid service.

so

想利用Google Translate API free charge 就要另外想办法了

Google提供免费的在线翻译功能,因此,可以通过Web发送翻译请求给Google,接收它的html返回,然后,通过分析html获取翻译后的文字.

function translate_web($text, $language="auto|en") { 
	if (empty($text)) return false; 
	
	$url = "http://google.cn/translate_t?ie=UTF-8&oe=UTF-8&langpair=".$language."&text=".urlencode($text);	
    	$html=file_get_contents($url);
	
	// parse html 
	// html souce: TTS_TEXT_SIZE_LIMIT=100;TRANSLATED_TEXT='世界，你好！';INPUT_TOOL_PATH='//www.google.com';
	$mode= ("/TRANSLATED_TEXT='(.*)';INPUT_TOOL_PATH/");
	if (preg_match($mode,$html,$out)){
		return $out[1];//ret;
	}
}

更有甚者,有人发现通过http://translate.google.com/translate_a/t?client=p与Google交互可以得到json返回,这就相当于API使用了

function translate_json($text, $language="auto|en") { 
	if (empty($text)) return false; 
	
	$url = "http://translate.google.cn/translate_a/t?client=p&ie=UTF-8&oe=UTF-8&langpair=".$language."&text=".urlencode($text);
	$json=file_get_contents($url);
	$data = json_decode($json);
	return $data->sentences[0]->trans;	
}

Google翻译接口示例: http://download.csdn.net/detail/d_eng/6563915

这里要注意的有两个问题

1)编码问题,例子中都采用utf-8,连php文件的属性都是utf-8

2)google问题,google在中国不保证一直能连上,虽然有多个链接 google.com/google.cn/google.com.hk

2）微信调用

有了接口,在微信中调用就简单了

接口文件 translate_func.php (save as utf-8)

<?php 
/*
	2 Google Translate interface

	1)	Google Translate WEB IF
		get translated text by parsing return html which code is GBK
		function translate_web()
	2)	Google Translate JSON IF
		get translated text which format=json(set client<>t)&default code=GBK
		function translate_json()

	 d_eng (sh109419@163.com)
	 2013-11-16 
 */ 

/*
	Google Translate WEB IF
	get translated text by parsing return html which code is GBK
 */ 

//header("Content-Type:text/html; charset=utf-8");  

function translate_web($text, $language="auto|en") { 
	if (empty($text)) return false; 
	
	$url = "http://google.cn/translate_t?ie=UTF-8&oe=UTF-8&langpair=".$language."&text=".urlencode($text);	
        $html=file_get_contents($url);
	
	// parse html 
	// html souce: TTS_TEXT_SIZE_LIMIT=100;TRANSLATED_TEXT='世界，你好！';INPUT_TOOL_PATH='//www.google.com';
	$mode= ("/TRANSLATED_TEXT='(.*)';INPUT_TOOL_PATH/");
	if (preg_match($mode,$html,$out)){
		return $out[1];//ret;
	}
} 

function translate_json($text, $language="auto|en") { 
	if (empty($text)) return false; 
	
	$url = "http://translate.google.cn/translate_a/t?client=p&ie=UTF-8&oe=UTF-8&langpair=".$language."&text=".urlencode($text);
	$json=file_get_contents($url);
	$data = json_decode($json);
	return $data->sentences[0]->trans;	
}

function  with_chinese($text){        
    return  preg_match('/[\x7f-\xff]/',$text);
}        

function translate($text) { 
	if (with_chinese($text)) {
		return translate_json($text,'zh-CN|en');
	} else {
		return translate_json($text,'en|zh-CN');
	}
}

?>

调用代码片段

if  ($RX_TYPE=="text") {  
                    include("translate_func.php");  
                    $resultStr = $this->responseText($postObj,  translate(trim($postObj->Content)));  
                }

3）效果展示

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