<?php 
    // 此处填写你在控制台-应用管理-创建应用后获取的AK
    $ak = '您的AK';
    
    // 发起一个http get请求，并返回请求的结果
    // $url字段为请求的地址
    // $param字段为请求的参数
    function request_get($url = '', $param = array()) {
        if (empty($url) || empty($param)) {
            return false;
        }
        
        $getUrl = $url . "?" . http_build_query($param);
        $curl = curl_init(); // 初始化curl
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); // 跳过证书检查   
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2); // 从证书中检查SSL加密算法是否存在
        curl_setopt($curl, CURLOPT_URL, $getUrl); // 抓取指定网页
        curl_setopt($curl, CURLOPT_TIMEOUT, 1000); // 设置超时时间1秒
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); // curl不直接输出到屏幕
        curl_setopt($curl, CURLOPT_HEADER, 0); // 设置header
        $data = curl_exec($curl); // 运行curl

        if (!$data) {
            print("an error occured in function request_get(): " . curl_error($curl) . "\n");
        }

        curl_close($curl);
        
        return $data;
    }

    // 请求地址
    $url = 'https://api.map.baidu.com/directionlite/v1/transit';
    
    // 构造请求参数
    $param['origin']   = '40.056878,116.30815';
    $param['destination']   = '39.909263,116.39269';
    $param['ak']   = $ak;

    $res = request_get($url, $param);

    // 将原始返回的结果打印出来
    print("请求的原始返回结果为:\n");
    print($res . "\n");
?>

{
    "status": 0,
    "message": "ok",
    "result": {
      "origin": {
        "lng": 116.33929505188,
        "lat": 40.011157363344
      },
      "destination": {
        "lng": 116.45255341058,
        "lat": 39.936401378723
      },
      "routes": [
        {
          "distance": 17279,
          "duration": 5969,
          "steps": [
            {
              "distance": 200,
              "duration": 60,
              "direction": 6,
              "turn_type": "左转",
              "name": "",
              "instruction": "骑行200米",
              "restrictions_info": "",
              "path": "116.33996581129,40.011176482433;116.34000634056,40.010546386374;116.34001662242,40.010166414225;116.34006725922,40.009366288399",
              "start_location": {
                "lng": "116.33996581129",
                "lat": "40.011176482433"
              },
              "end_location": {
                "lng": "116.34006725922",
                "lat": "40.009366288399"
              }
            },
            {
              "distance": 299,
              "duration": 90,
              "direction": 3,
              "turn_type": "右转",
              "name": "",
              "instruction": "骑行300米",
              "restrictions_info": "",
              "path": "116.34006725922,40.009366288399;116.34006725922,40.009366288399;116.34051817356,40.009373607054;116.34073860075,40.009372364109;116.34090892694,40.009361436097;116.34188059607,40.009326642423;116.34238134243,40.009304512481;116.34249149949,40.009294076399;116.34333250812,40.009311098645;116.34351269733,40.009310547848;116.34361279144,40.009320252832",
              "start_location": {
                "lng": "116.34006725922",
                "lat": "40.009366288399"
              },
              "end_location": {
                "lng": "116.34361279144",
                "lat": "40.009320252832"
              }
            },
            {
              "distance": 353,
              "duration": 106,
              "direction": 6,
              "turn_type": "",
              "name": "荷清路",
              "instruction": "<b>荷清路</b>,骑行350米",
              "restrictions_info": "",
              "path": "116.34361279144,40.009320252832;116.34361279144,40.009320252832;116.34363312949,40.008820305313;116.34365349976,40.008250369354;116.34367390861,40.007590447161;116.3436942052,40.007100486641;116.34369423292,40.007050496216;116.34374476108,40.006150523117",
              "start_location": {
                "lng": "116.34361279144",
                "lat": "40.009320252832"
              },
              "end_location": {
                "lng": "116.34374476108",
                "lat": "40.006150523117"
              }
            },
            {
              "distance": 2797,
              "duration": 847,
              "direction": 4,
              "turn_type": "右转",
              "name": "清华东路",
              "instruction": "<b>清华东路</b>,骑行2.8公里",
              "restrictions_info": "",
              "path": "116.34374476108,40.006150523117;116.34374476108,40.006150523117;116.34383489109,40.006060294678;116.34394499009,40.006060006424;116.34414515999,40.006059511698;116.34450541759,40.006088711557;116.34456545384,40.006098589288;116.3446354955,40.006108451262;116.34479558101,40.006138152013;116.34500568013,40.006177796119;116.34510572174,40.006197641242;116.34512573173,40.006197612124;116.34522577455,40.006207470472;116.3458759961,40.006226790498;116.34590599827,40.006236767237;116.34618604744,40.006246606549;116.34653607392,40.006256511597;116.3466560755,40.006256506639;116.34691606267,40.006256543164;116.34724601437,40.00625668266;116.34771586818,40.00628705573;116.34900511641,40.006329170601;116.34953464799,40.006350497446;116.35008407093,40.006362157204;116.35050356308,40.006373616053;116.35054351224,40.006373763799;116.35089304022,40.006385118637;116.35161194609,40.006408264766;116.35178166612,40.006409078578;116.35183158204,40.006409323011;116.351941389,40.006419867057;116.35196135445,40.006419967502;116.35199130238,40.006420118858;116.35204121497,40.006420372958;116.35215101989,40.00642094006;116.35228077916,40.006431622764;116.35238059441,40.006432159847;116.35247042544,40.006432651037;116.35257022947,40.006443203655;116.35266005514,40.006443710437;116.3527798135,40.006454395788;116.35283969363,40.006454744277;116.35309915597,40.006466290256;116.35428643729,40.006504143035;116.35496469427,40.006519193818;116.35536359695,40.006542350024;116.35556303054,40.006553979728;116.35623106033,40.006569691425;116.35632078116,40.006580485913;116.35710826747,40.006607760864;116.35749696162,40.006621540896;116.35754679182,40.00662203465;116.35760658716,40.00662262981;116.35837386249,40.006650518529;116.35867276174,40.006653719616;116.35878234679,40.006664908968;116.35891185858,40.006666328744;116.35896166427,40.006676876416;116.35909116991,40.006678314085;116.35924058866,40.006689987045;116.35944977259,40.006692360304;116.35961909829,40.00670430387;116.35969878093,40.006705226804;116.35973862164,40.00670569005;116.35989798042,40.006707554852;116.36055525684,40.0067354408;116.36092368372,40.00674999841;116.36162061188,40.006788879784;116.36255630859,40.006841325179;116.36293451635,40.006856520186;116.3637206919,40.006887608207;116.36400925404,40.006901772563;116.36463607344,40.006930988099;116.36589943305,40.00699023139;116.36603868567,40.006992405223;116.3665160869,40.007019928584;116.36674482782,40.007033573045;116.36719234501,40.007050776941;116.36758016704,40.007067094186;116.36803756455,40.007094628445;116.36818671291,40.007097105637;116.3682861434,40.007098762194;116.36846511481,40.007101754104;116.36995635392,40.00717714828;116.37029433203,40.007193011697;116.37101994565,40.0072357172;116.37122867903,40.007239401666;116.37131813496,40.007240984306;116.37142747453,40.007232923392;116.37146723211,40.007233628587;116.37161632179,40.007236276634;116.37170577468,40.007237868114;116.37189461197,40.007251232353;116.37253068264,40.007282626543;116.37277918287,40.007217115116;116.37327608867,40.007236098161;116.37354440932,40.007250965457;116.3736537263,40.007252952383;116.37389223402,40.007257293454;116.37415061444,40.007262004852;116.37461766889,40.007290537675;116.37469716863,40.007291992969;116.3747964875,40.007393793831;116.37500517277,40.007397618476;116.37580013832,40.007442209692;116.37590944757,40.007444219173;116.37626718056,40.007460795993",
              "start_location": {
                "lng": "116.34374476108",
                "lat": "40.006150523117"
              },
              "end_location": {
                "lng": "116.37626718056",
                "lat": "40.007460795993"
              }
            },
            {
              "distance": 1528,
              "duration": 463,
              "direction": 5,
              "turn_type": "左转",
              "name": "G6辅路",
              "instruction": "<b>G6辅路</b>,骑行1.5公里",
              "restrictions_info": "",
              "path": "116.37626718056,40.007460795993;116.37626718056,40.007460795993;116.37664505103,40.006997830634;116.37666494152,40.006968201758;116.37692347788,40.006653012185;116.37703285982,40.006515047359;116.37721185743,40.006268379938;116.37741072713,40.006022075629;116.37760960433,40.005755771884;116.37782835835,40.005479831163;116.37836530864,40.004759781441;116.37863378419,40.0043847459;116.37957834418,40.003192111054;116.379608169,40.00316265599;116.37967776383,40.003083928127;116.37975730374,40.002985381951;116.37989649657,40.002817922638;116.37995615299,40.002739011181;116.38007546221,40.002591184936;116.38130833439,40.000993465256;116.3814872998,40.000756667852;116.3815469549,40.000677733396;116.38157678245,40.000638265788;116.38165632104,40.000539683734;116.38167620684,40.000510038328;116.38170603212,40.00048056884;116.38175574325,40.000421453239;116.38176568726,40.00040163064;116.38182534457,40.000312692133;116.38191482722,40.000194281243;116.38200430577,40.000095866524;116.38207390083,40.000017098029;116.38222303524,39.999839732585;116.38230257456,39.999741135113;116.38239205963,39.999612711638;116.38253125473,39.999435157419;116.38260085575,39.999326379055;116.38271022495,39.999178294117;116.38273011071,39.999148642017;116.3827698822,39.999089337401;116.38278976641,39.999069684363;116.38283948154,39.998990552724;116.38288919515,39.998921419697;116.3829886252,39.998763151953;116.38300851227,39.998723498337;116.3830482876,39.998634191081;116.38321732079,39.998337124679;116.38324715195,39.998267641872;116.38329686952,39.998158502763;116.38337641634,39.997989877805;116.38342613398,39.997870736274;116.38349573974,39.997681936879;116.3835752878,39.997463306218;116.38364489372,39.997224502796;116.3836846691,39.997055185868;116.38372444436,39.99685586825;116.38373439323,39.996636040392;116.3837244556,39.996455871897;116.38365486728,39.996164683283;116.383585276,39.995953491774;116.38351568423,39.995812298229;116.3833367348,39.995539220824;116.38324726061,39.995417677727",
              "start_location": {
                "lng": "116.37626718056",
                "lat": "40.007460795993"
              },
              "end_location": {
                "lng": "116.38324726061",
                "lat": "39.995417677727"
              }
            },
            {
              "distance": 77,
              "duration": 23,
              "direction": 5,
              "turn_type": "左转",
              "name": "G6辅路",
              "instruction": "<b>G6辅路</b>,骑行80米",
              "restrictions_info": "",
              "path": "116.38324726061,39.995417677727;116.38324726061,39.995417677727;116.38325719947,39.99535784836;116.38325719868,39.995337848079;116.38329696069,39.99527853259;116.38335660177,39.995149557543;116.38343612441,39.995010922469;116.38346594429,39.994941433295;116.38350570604,39.994882114537;116.38356534799,39.994783135007",
              "start_location": {
                "lng": "116.38324726061",
                "lat": "39.995417677727"
              },
              "end_location": {
                "lng": "116.38356534799",
                "lat": "39.994783135007"
              }
            },
            {
              "distance": 1402,
              "duration": 424,
              "direction": 3,
              "turn_type": "过马路左转",
              "name": "G6辅路",
              "instruction": "<b>G6辅路</b>,骑行1.4公里",
              "restrictions_info": "",
              "path": "116.38356534799,39.994783135007;116.38356534799,39.994783135007;116.38363493785,39.99477432645;116.38373435324,39.994766025633;116.38384371095,39.994747890409;116.38402266259,39.994710932236;116.38409225565,39.994692111838;116.38419167449,39.994653793506;116.38425132513,39.994614800254;116.38431097536,39.994565805328;116.38438056759,39.994506976072;116.38445015498,39.994388143011;116.38449985886,39.994288974746;116.3845097967,39.994239139939;116.38452967511,39.994169471143;116.38457937301,39.994020299045;116.38459925194,39.993960629819;116.38462906775,39.993851124746;116.3846787626,39.993691949385;116.38470857589,39.993572442375;116.38475826899,39.993413264625;116.38477814366,39.993333592316;116.38482783222,39.993154411416;116.38488746103,39.992965393725;116.38490733755,39.992905720888;116.38495701955,39.992706534758;116.38502658099,39.992477674557;116.38505639215,39.992378162042;116.38509614244,39.992258812092;116.3851060759,39.992208973064;116.38514581918,39.992059619752;116.38516568727,39.991969941586;116.38518555937,39.991900264622;116.38519549645,39.991870426426;116.3852054357,39.991850588934;116.3852253075,39.991780911487;116.38525511598,39.991681395236;116.38526505052,39.99164155583;116.3852650459,39.991621554228;116.38527498267,39.991591715546;116.38530479517,39.991512199975;116.38531472945,39.991472360238;116.38533460022,39.991402681394;116.38538428263,39.991253485337;116.38541408404,39.991133964345;116.38546376502,39.990984765865;116.38554325578,39.990756046187;116.38555318889,39.990716204888;116.3856028763,39.990597005222;116.38562274487,39.990527322801;116.38587109504,39.989681273357;116.38591082733,39.989541901246;116.38595056234,39.989412529261;116.38622868005,39.988476892913;116.38625846511,39.988347353455;116.38630813621,39.988208130101;116.3863279908,39.988118435607;116.38637764448,39.987939204393;116.38638757757,39.987909358803;116.38645709572,39.987670433535;116.3867748441,39.986525296128;116.38682447849,39.986326046103;116.38685427322,39.986236500288;116.38689398926,39.986097101551;116.38692377338,39.985987550912;116.38696349342,39.985858151997;116.38699328186,39.985758601675;116.38706276789,39.98548964195;116.38710248072,39.985350237406;116.38716204889,39.985141128519;116.38718189923,39.985061423131;116.38718188836,39.985041419381;116.38721167984,39.984951866379;116.38723152418,39.984862158352;116.38726130967,39.984762602427;116.38727120643,39.984672739397;116.38728113101,39.9846328859;116.38734068887,39.984413767288;116.38736052585,39.984314055231;116.38738037407,39.984234346815;116.38740021626,39.984144636092;116.3874299996,39.984045076487;116.38748948783,39.983715928662;116.38750931639,39.983606211959;116.38752915061,39.983506496976;116.38756865623,39.983047010195;116.38757852819,39.982927136822",
              "start_location": {
                "lng": "116.38356534799",
                "lat": "39.994783135007"
              },
              "end_location": {
                "lng": "116.38757852819",
                "lat": "39.982927136822"
              }
            },
            {
              "distance": 1185,
              "duration": 359,
              "direction": 3,
              "turn_type": "直行",
              "name": "北土城西路",
              "instruction": "<b>北土城西路</b>,骑行1.2公里",
              "restrictions_info": "",
              "path": "116.38757852819,39.982927136822;116.38757852819,39.982927136822;116.38771779594,39.982929268786;116.38774763949,39.982929724282;116.3878869116,39.98293184356;116.38805603262,39.982934402746;116.38837439285,39.982939177034;116.38846393519,39.982940509537;116.38861317592,39.982942720223;116.38872262191,39.982944333261;116.38930969791,39.982962867404;116.39047410711,39.982989166506;116.3908125426,39.983003742482;116.39087226808,39.983004541813;116.39109126847,39.983007452412;116.39126050361,39.983009679505;116.39238559791,39.983033984466;116.39285365189,39.983049671538;116.39315243443,39.98305321663;116.39381980426,39.983070896026;116.39405888806,39.983073563989;116.39421828565,39.983075318225;116.3944573947,39.983077912663;116.39451717436,39.983078554309;116.39480612925,39.983091618215;116.39526450815,39.983096338974;116.39638081196,39.983117123394;116.3971385083,39.983133852776;116.39734789949,39.983135625836;116.39923302153,39.983169873831;116.39981173774,39.983173613197;116.40044046751,39.983187333679;116.40073990948,39.983198979634;116.40142871924,39.98320244705",
              "start_location": {
                "lng": "116.38757852819",
                "lat": "39.982927136822"
              },
              "end_location": {
                "lng": "116.40142871924",
                "lat": "39.98320244705"
              }
            },
            {
              "distance": 2518,
              "duration": 763,
              "direction": 3,
              "turn_type": "右转",
              "name": "北土城东路",
              "instruction": "<b>北土城东路</b>,骑行2.5公里",
              "restrictions_info": "",
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