微信公众平台开发笔记

@ $db = new mysqli(SAE_MYSQL_HOST_M.':'.SAE_MYSQL_PORT,SAE_MYSQL_USER,SAE_MYSQL_PASS,'你的应用名');

//---------- 接 收 数 据 ---------- //

$postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; //获取POST数据

//用SimpleXML解析POST过来的XML数据
$postObj = simplexml_load_string($postStr,'SimpleXMLElement',LIBXML_NOCDATA);

$fromUsername = $postObj->FromUserName; //获取发送方帐号（OpenID）
$toUsername = $postObj->ToUserName; //获取接收方账号
$msgType = $postObj->MsgType; //消息内容

function sendText($to, $from, $content, $time)
{
	//返回消息模板
	$textTpl = "<xml>
	<ToUserName><![CDATA[%s]]></ToUserName>
	<FromUserName><![CDATA[%s]]></FromUserName>
	<CreateTime>%s</CreateTime>
	<MsgType><![CDATA[%s]]></MsgType>
	<Content><![CDATA[%s]]></Content>
	<FuncFlag>0</FuncFlag>
	</xml>";

	//格式化消息模板
	$msgType = "text";
	$time = time();
	$resultStr = sprintf($textTpl,$to,$from,
	$time,$msgType,$content);
	echo $resultStr;
}

function my_get_file_contents($url){

    if(function_exists('file_get_contents')){

        $file_contents = file_get_contents($url);

	}
	else
	{        
        //初始化一个cURL对象
        $ch = curl_init();

        $timeout = 5;

        //设置须要抓取的URL
        curl_setopt ($ch, CURLOPT_URL, $url);

        //设置cURL 參数，要求结果保存到字符串中还是输出到屏幕上
        curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);

        //在发起连接前等待的时间，假设设置为0，则无限等待
        curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);

        //执行cURL，请求网页
        $file_contents = curl_exec($ch);

        //关闭URL请求
        curl_close($ch);
    }

    return $file_contents;
}

function baiduDic($word,$from="auto",$to="auto"){
        
    //首先对要翻译的文字进行 urlencode 处理
    $word_code=urlencode($word);
        
    //注冊的API Key
    $appid="yourAPIkey";
        
    //生成翻译API的URL GET地址
    $baidu_url = "http://openapi.baidu.com/public/2.0/bmt/translate?client_id=".$appid."&q=".$word_code."&from=".$from."&to=".$to;
        
    $text=json_decode(my_get_file_contents($baidu_url));

    $text = $text->trans_result;

    return $text[0]->dst;
}

//$EARTH_RADIUS = 6371;//地球半径，平均半径为6371km
 /**
 *计算某个经纬度的周围某段距离的正方形的四个点
 *
 *@param lng float 经度
 *@param lat float 纬度
 *@param distance float 该点所在圆的半径，该圆与此正方形内切，默认值为0.5千米
 *@return array 正方形的四个点的经纬度坐标
 */
function returnSquarePoint($lng, $lat,$distance = 0.5){
 
    $EARTH_RADIUS = 6371;
    $dlng =  2 * asin(sin($distance / (2 * $EARTH_RADIUS)) / cos(deg2rad($lat)));
    $dlng = rad2deg($dlng);
     
    $dlat = $distance/$EARTH_RADIUS;
    $dlat = rad2deg($dlat);
     
    return array(
                'left-top'=>array('lat'=>$lat + $dlat,'lng'=>$lng-$dlng),
                'right-top'=>array('lat'=>$lat + $dlat, 'lng'=>$lng + $dlng),
                'left-bottom'=>array('lat'=>$lat - $dlat, 'lng'=>$lng - $dlng),
                'right-bottom'=>array('lat'=>$lat - $dlat, 'lng'=>$lng + $dlng)
                );
 }

 //使用此函数计算得到结果后，带入sql查询。
     $squares = returnSquarePoint($lng, $lat);
     $query = "select * from message where location_X != 0 and 
    	       location_X > ".$squares['right-bottom']['lat']." and location_X< ".$squares['left-top']['lat'] 
	           ."and location_Y > ".$squares['left-top']['lng']." and location_Y< ".$squares['right-bottom']['lng'] 
               ."order by time desc";

function inputCheck($word)
{
	if(preg_match("/^[0-9a-zA-Z]{6,20}$/",$word))
	{
		return true;
	}
	return false;
}

<?php  
    $str = "三知sunchis开发网";  
    echo strlen($str)."<br>";               //结果：22  
    echo mb_strlen($str,"UTF8")."<br>";     //结果：12  
    $strlen = (strlen($str)+mb_strlen($str,"UTF8"))/2;  
    echo $strlen;                           //结果：17  
?> 

<?
$str = "測试中文";
echo $str;
echo "<hr>";
//if (preg_match("/^[".chr(0xa1)."-".chr(0xff)."]+$/", $str)) { //仅仅能在GB2312情况下使用
//if (preg_match("/^[\x7f-\xff]+$/", $str)) { //兼容gb2312,utf-8  //推断字符串是否全是中文
if (preg_match("/[\x7f-\xff]/", $str)) {  //推断字符串中是否有中文
echo "正确输入";
} else {
echo "错误输入";
}
?>