How to use PHP to call API interface to realize weather query function

Recently, when testing the WeChat public platform, I wanted to add the function of querying the weather in the next few days (including today) in the submenu, so I found the following useful weather forecast query interfaces API, which are widely used: National Meteorological Administration weather interface, Sina weather forecast interface, Baidu weather forecast interface, Google weather interface, Yahoo weather interface, etc. I used the free weather query interface API provided by Baidu, and I will share it with you below. ...

1, query method:

Baidu provides weather information according to latitude and city name.

2. Interface example:

3. Description of interface parameters:

4. Return the result description:

5、

//City name

$ City? =? Shanghai';

//Encode the string in json format.

$arr？ =json_decode($str，TRUE)； ?

print _ r($ ATR)；

//City name

$city =' Shanghai';

//Get data in json format

$ str = file _ get _ contents("/telematics/v3/weather？ Location = ". $ city. "& output = JSON & AMPAK = 5slgyqgdenn7sy7pw29iuvrz");

//Encode the string in json format.

$arr =json_decode($str，TRUE)； ?

print _ r($ ATR)；

6. The returned page is json encoded data:

[Normal] View normal copy printing?

& ltmeta？ charset="UTF-8 " >

rank

(

[error]? = & gt？ 0

[Status]? = & gt？ success

[Date]? = & gt？ 20 14-03- 17

[Result]? = & gt？ rank

(

[0]? = & gt？ rank

(

[current city]= & gt； ? Shanghai

[Weather data] = > ? rank

(

[0]= >？ rank

(

[Date]? = & gt？ Monday (today,? Real time: 19℃)

[dayPictureUrl]？ = & gt/images/weather/day/qing.png

[nightPictureUrl]？ = & gt/images/weather/night/qing.png

[weather]? = & gt？ very good

[wind]? = & gt？ Southwest wind 3-4

[temperature]? = & gt？ 13℃

)

[ 1]? = & gt？ rank

(

[Date] = > ? Tuesday

[dayPictureUrl]？ = & gt/images/weather/day/duoyun.png

[nightPictureUrl]？ = & gt？ /images/ weather/night /yin.png

[Weather] = > ? Cloudy to cloudy

[wind] = > ? The northeast wind is 3-4

[temperature]? = & gt？ 24? ~? 9℃

)

[2]? = & gt？ rank

(

[Date] = > ? Wednesday

[dayPictureUrl]？ = & gt/images/weather/day/zhong Yu . png

[nightPictureUrl]？ = & gt？ /pictures/weather/night/light rain. png

[Weather] = > ? Moderate rain to light rain

[wind] = > ? The northeast wind is 3-4

[temperature]? = & gt？ 15? ~? 8℃

)

[3]? = & gt？ rank

(

[Date] = > ? Thursday

[dayPictureUrl]？ = & gt/images/weather/day/duoyun.png

[nightPictureUrl]？ = & gt/images/weather/night/qing.png

[Weather] = > ? cloudy to sunny

[wind] = > ? The north wind is 3-4

[temperature]? = & gt？ 14? ~? 6℃

)

)

)

)

)

& ltmeta charset="UTF-8 " >

rank

(

[Error] = > 0

[status] = > success

[Date] = > 20 14-03- 17

[Result] = > rank

(

[0] = > arrangement

(

[current city]= & gt； Shanghai

[Weather data] = > rank

(

[0]= > arrangement

(

? [Date] = > Monday (today, real time: 19℃)

? [dayPictureUrl]= & gt； /images/weather/day/qing.png

? [nightPictureUrl]= & gt； /images/weather/night/qing.png

[Weather] = > very good

? [wind] = > Southwest wind 3-4

? [temperature] = > 13℃

)

[1] = > arrangement

(

[Date] = > Tuesday

? [dayPictureUrl]= & gt； /images/weather/day/duoyun.png

? [nightPictureUrl]= & gt； /images/ weather/night /yin.png

[Weather] = > Cloudy to cloudy

[wind] = > The northeast wind is 3-4

? [Temperature] = >24 ~ 9℃

)

[2] = > arrangement

(

[Date] = > Wednesday

? [dayPictureUrl]= & gt； /images/weather/day/zhong Yu . png

? [nightPictureUrl]= & gt； /pictures/weather/night/light rain. png

[Weather] = > Moderate rain to light rain

[wind] = > The northeast wind is 3-4

? [temperature] = > 15 ~ 8℃

)

[3] = > arrangement

(

[Date] = > Thursday

? [dayPictureUrl]= & gt； /images/weather/day/duoyun.png

[nightPictureUrl]= & gt； /images/weather/night/qing.png

[Weather] = > cloudy to sunny

[wind] = > The north wind is 3-4

? [temperature] = > 14 ~ 6℃

)

)

)

)

)

7.PHP comes with a built-in function that handles json format strings. Let's make an example and give the complete code:

[php] View plain text printing?

& lt Metacharset ="UTF-8 ">

& lt？ Server-side programming language (abbreviation of professional hypertext preprocessor)

//City name

$ City? =? Shanghai';

//Get data in json format

$str？ =? file _ get _ contents("/telematics/v3/weather？ Location = ". $ city. "& output = JSON & AMPAK = 5slgyqgdenn7sy7pw29iuvrz");

//Encode the string in json format.

$arr？ =? json_decode($str，TRUE)； ?

Echo? "City:". $ arr ['result'] [0] ['current city']. "? Date: ". $arr['date']。 “& ltbr？ /& gt； & ltbr？ />；

foreach($ arr[' results '][0][' weather _ data ']as？ $val)

{

Echo? $val['date']。 “& ltbr/>；

Echo? "Weather: {$ val ['weather']} < br/>;

Echo? "Wind direction: {$ val ['wind']} < br/>；

Echo? "Temperature: {$ val ['temperature']}

}

& gt

& lt Metacharset ="UTF-8 ">

& lt？ Server-side programming language (abbreviation of professional hypertext preprocessor)

//City name

$city =' Shanghai';

//Get data in json format

$ str = file _ get _ contents("/telematics/v3/weather？ Location = ". $ city. "& output = JSON & AMPAK = 5slgyqgdenn7sy7pw29iuvrz");

//Encode the string in json format.

$arr = json_decode($str，TRUE)； ?

Echo "City:". $ arr ['result'] [0] ['current city']. "Date:". $ arr ['date']。 "

foreach($ arr[' results '][0][' weather _ data ']as $ val)

{

echo $val['date']。 “& ltbr/>；

echo " Weather:{ $ val[' Weather ']} < br/>；

Echo "wind direction: {$ val ['wind']} < br/>;

echo " temperature:{ $ val[' temperature ']} < br/& gt； & ltbr />；

}

& gt

8. The contents returned are as follows: