PHP1讲座：PHP微信公众平台开发-天气预报功能开发

mb_substr — 获取字符串的部分

　　string mb_substr ( string $str , int $start [, int $length [, string $encoding ]] ) 说明：根据字符数执行一个多字节安全的 substr() 操作。 位置是从 str 的开始位置进行计数。 第一个字符的位置是 0。第二个字符的位置是 1，以此类推。 参数： str
从该 string 中提取子字符串。

start
str 中要使用的第一个字符的位置。
正数 -> 从字符串开头指定位置开始；
负数 -> 从字符串结尾指定位置开始；

length
str 中要使用的最大字符数。
正数 -> 从 start 处开始最多包括 length 个字符;
负数 -> string 末尾处的 length 个字符将会被漏掉（若 start 是负数则从字符串开头算起）。  encoding
encoding 参数为字符编码。如果省略，则使用内部字符编码。 返回值： mb_substr() 函数根据 start 和 length 参数返回 str 中指定的部分。

if($str == '天气' && !empty($str_key))
{ //调用函数查询天气数据 }

{"weatherinfo":{ //基本信息; "city":"苏州","city_en":"suzhou",
"date_y":"2013年7月9日","date":"","week":"星期二","fchh":"18","cityid":"101190401", //摄氏温度 "temp1":"30℃~37℃",
"temp2":"30℃~37℃",
"temp3":"29℃~35℃",
"temp4":"27℃~33℃",
"temp5":"27℃~31℃",
"temp6":"27℃~35℃", //华氏温度; "tempF1":"86℉~98.6℉",
"tempF2":"86℉~98.6℉",
"tempF3":"84.2℉~95℉",
"tempF4":"80.6℉~91.4℉",
"tempF5":"80.6℉~87.8℉",
"tempF6":"80.6℉~95℉", //天气描述; "weather1":"晴转多云",
"weather2":"晴转多云",
"weather3":"晴转多云",
"weather4":"多云",
"weather5":"雷阵雨转中雨",
"weather6":"雷阵雨转多云", //天气描述图片序号 "img1":"0",
"img2":"1",
"img3":"0",
"img4":"1",
"img5":"0",
"img6":"1",
"img7":"1",
"img8":"99",
"img9":"4",
"img10":"8",
"img11":"4",
"img12":"1", //图片名称; "img_single":"1",
"img_title1":"晴",
"img_title2":"多云",
"img_title3":"晴",
"img_title4":"多云",
"img_title5":"晴",
"img_title6":"多云",
"img_title7":"多云",
"img_title8":"多云",
"img_title9":"雷阵雨",
"img_title10":"中雨",
"img_title11":"雷阵雨",
"img_title12":"多云",
"img_title_single":"多云", //风速描述 "wind1":"西南风3-4级",
"wind2":"西南风3-4级",
"wind3":"东南风3-4级",
"wind4":"东南风3-4级转4-5级",
"wind5":"东南风4-5级转西南风3-4级",
"wind6":"西南风3-4级转4-5级", //风速级别描述 "fx1":"西南风",
"fx2":"西南风",
"fl1":"3-4级",
"fl2":"3-4级",
"fl3":"3-4级",
"fl4":"3-4级转4-5级",
"fl5":"4-5级转3-4级",
"fl6":"3-4级转4-5级", //今日穿衣指数; "index":"炎热",
"index_d":"天气炎热，建议着短衫、短裙、短裤、薄型T恤衫等清凉夏季服装。", //48小时穿衣指数 "index48":"炎热",
"index48_d":"天气炎热，建议着短衫、短裙、短裤、薄型T恤衫等清凉夏季服装。", //紫外线及48小时紫外线 "index_uv":"中等",
"index48_uv":"中等", //洗车指数 "index_xc":"适宜", //旅游指数 "index_tr":"较不宜", //舒适指数 "index_co":"很不舒适",
"st1":"36",
"st2":"28",
"st3":"36",
"st4":"28",
"st5":"34",
"st6":"27", //晨练指数 "index_cl":"较适宜", //晾晒指数 "index_ls":"适宜", //过敏指数 "index_ag":"不易发"}}

private function weather($n){ include("weather_cityId.php"); $c_name=$weather_cityId[$n]; if(!empty($c_name)){ $json=file_get_contents("http://m.weather.com.cn/data/".$c_name.".html"); return json_decode($json);
    } else { return null;
    }
}

php $weather_cityId = array("北京"=>"101010100","上海"=>"101020100","苏州"=>"101190401"); ?>

$cOntentStr= "【".$data->weatherinfo->city."天气预报】\n".$data->weatherinfo->date_y." ".$data->weatherinfo->fchh."时发布"."\n\n实时天气\n".$data->weatherinfo->weather1." ".$data->weatherinfo->temp1." ".$data->weatherinfo->wind1."\n\n温馨提示：".$data->weatherinfo->index_d."\n\n明天\n".$data->weatherinfo->weather2." ".$data->weatherinfo->temp2." ".$data->weatherinfo->wind2."\n\n后天\n".$data->weatherinfo->weather3." ".$data->weatherinfo->temp3." ".$data->weatherinfo->wind3;

php /**
  * wechat php test */ //define your token define("TOKEN", "zhuojin"); $wechatObj = new wechatCallbackapiTest(); $wechatObj->responseMsg(); //$wechatObj->valid(); class wechatCallbackapiTest
{ /*public function valid()
    {
        $echoStr = $_GET["echostr"];

        //valid signature , option
        if($this->checkSignature()){
            echo $echoStr;
            exit;
        }
    }*/ public function responseMsg()
    { //get post data, May be due to the different environments $postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; //extract post data if (!empty($postStr)){ $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA); $RX_TYPE = trim($postObj->MsgType); switch($RX_TYPE)
                { case "text": $resultStr = $this->handleText($postObj); break; case "event": $resultStr = $this->handleEvent($postObj); break; default: $resultStr = "Unknow msg type: ".$RX_TYPE; break;
                } echo $resultStr;
        }else { echo ""; exit;
        }
    } public function handleText($postObj)
    { $fromUsername = $postObj->FromUserName; $toUsername = $postObj->ToUserName; $keyword = trim($postObj->Content); $time = time(); $textTpl = "
                    
                    
                    %s
                    
                    
                    0
                    "; if(!empty( $keyword ))
        { $msgType = "text"; //天气 $str = mb_substr($keyword,-2,2,"UTF-8"); $str_key = mb_substr($keyword,0,-2,"UTF-8"); if($str == '天气' && !empty($str_key)){ $data = $this->weather($str_key); if(empty($data->weatherinfo)){ $contentStr = "抱歉，没有查到\"".$str_key."\"的天气信息！";
                } else { $contentStr = "【".$data->weatherinfo->city."天气预报】\n".$data->weatherinfo->date_y." ".$data->weatherinfo->fchh."时发布"."\n\n实时天气\n".$data->weatherinfo->weather1." ".$data->weatherinfo->temp1." ".$data->weatherinfo->wind1."\n\n温馨提示：".$data->weatherinfo->index_d."\n\n明天\n".$data->weatherinfo->weather2." ".$data->weatherinfo->temp2." ".$data->weatherinfo->wind2."\n\n后天\n".$data->weatherinfo->weather3." ".$data->weatherinfo->temp3." ".$data->weatherinfo->wind3;
                }
            } else { $contentStr = "感谢您关注【卓锦苏州】"."\n"."微信号：zhuojinsz"."\n"."卓越锦绣，名城苏州，我们为您提供苏州本地生活指南，苏州相关信息查询，做最好的苏州微信平台。"."\n"."目前平台功能如下："."\n"."【1】 查天气，如输入：苏州天气"."\n"."【2】 查公交，如输入：苏州公交178"."\n"."【3】 翻译，如输入：翻译I love you"."\n"."【4】 苏州信息查询，如输入：苏州观前街"."\n"."更多内容，敬请期待...";
            } $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr); echo $resultStr;
        }else{ echo "Input something...";
        }
    } public function handleEvent($object)
    { $contentStr = ""; switch ($object->Event)
        { case "subscribe": $contentStr = "感谢您关注【卓锦苏州】"."\n"."微信号：zhuojinsz"."\n"."卓越锦绣，名城苏州，我们为您提供苏州本地生活指南，苏州相关信息查询，做最好的苏州微信平台。"."\n"."目前平台功能如下："."\n"."【1】 查天气，如输入：苏州天气"."\n"."【2】 查公交，如输入：苏州公交178"."\n"."【3】 翻译，如输入：翻译I love you"."\n"."【4】 苏州信息查询，如输入：苏州观前街"."\n"."更多内容，敬请期待..."; break; default : $contentStr = "Unknow Event: ".$object->Event; break;
        } $resultStr = $this->responseText($object, $contentStr); return $resultStr;
    } public function responseText($object, $content, $flag=0)
    { $textTpl = "
                    
                    
                    %s
                    
                    
                    %d
                    "; $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content, $flag); return $resultStr;
    } private function weather($n){ include("weather_cityId.php"); $c_name=$weather_cityId[$n]; if(!empty($c_name)){ $json=file_get_contents("http://m.weather.com.cn/data/".$c_name.".html"); return json_decode($json);
        } else { return null;
        }
    } private function checkSignature()
    { $signature = $_GET["signature"]; $timestamp = $_GET["timestamp"]; $nonce = $_GET["nonce"]; $token = TOKEN; $tmpArr = array($token, $timestamp, $nonce); sort($tmpArr); $tmpStr = implode( $tmpArr ); $tmpStr = sha1( $tmpStr ); if( $tmpStr == $signature ){ return true;
        }else{ return false;
        }
    }
} ?>