百度地图地理编码接口

http://lbsyun.baidu.com/index.php?title=webapi/guide/webservice-geocoding

/***返回经纬度*/function geoEncode($addr,$city="上海"){    $ak = "DQ1BXIF0qG***************";    $addr = urlencode($addr);    $url = "http://api.map.baidu.com/geocoder/v2/?address=$addr&output=json&ak=$ak";    $res =httpGet($url);    $res = json_decode($res,true);    if($res['status'] == 0){        return   $res['result']['location'];    }    return false;}function httpGet($url){    $curl = curl_init();    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);    curl_setopt($curl, CURLOPT_TIMEOUT, 2000);    curl_setopt($curl, CURLOPT_URL, $url);    $res = curl_exec($curl);    curl_close($curl);    return $res;}