Use PHP to write a function about getting weather conditions for a specified number of days. The function section is normal, but when it is added to the for loop, there is no display or error. How to solve it?
Reference materials:
Sina weather api description
Brief description The last parameter in the url, day=0, represents today, if equal to 1, it represents the next day, and so on, but The maximum value is 3.
Code Target:
Jinhua Weather
Today xx-xx-xx Sunday x Sunny to cloudy during the day xxxx
Week x Sunny to cloudy during the day xxxx at night (Day 2)
Sunday x Sunny to cloudy during the day and xxxx at night (Day 3)
Sunday x Sunny to cloudy during the day and xxxx at night (Day 4)
<?php
function get_weather($k=3){
$arr = array('星期日','星期一','星期二','星期三','星期四','星期五','星期六','星期日','星期一','星期二');
$week=date('w');
$arrfeng=array('无风','软风','轻风','微风','和风','轻劲风','强风','疾风','大风','烈风','狂风','暴风','台风','风王之王');
$winfo='金华天气';
for ($i=0; $i>$k ; $i++) {
$url='http://php.weather.sina.com.cn/xml.php?city=%bd%f0%bb%aa&password=DJOYnieT8234jlsK&day='.$i;
$ch=curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$output = curl_exec($ch);
curl_close($ch);
$outobj=simplexml_load_string($output);
$a=$outobj->Weather;
//为了方便拼接字符串
$b=$a->status1;//天气情况1代表白天
$c=$a->status2;//天气情况2代表晚上
$d=$a->direction1;//白天风向
$e=$a->direction2;//晚上风向
$dd=$a->power1;//白天风级数
$ee=$a->power2;//晚上风级数
if($c=="")$c=$b;//解决 当晚上和白天 天气一样时 变量ee值为空
//$winfo='金华天气'
$winfo.= $arr[$week+$k].'白天'.$b.$d.$arrfeng[intval($dd)].'晚上'.$c.$e.$arrfeng[intval($ee)].'\n';
}
return $winfo;
}
$str=get_weather(3);
echo $str;
?>But if you don’t add a for loop, you can achieve it with a solid line by executing the function 4 times. code show as below
<?php
function get_weather($i){
$arr = array('星期日','星期一','星期二','星期三','星期四','星期五','星期六','星期日','星期一','星期二');
$week=date('w');
$arrfeng=array('无风','软风','轻风','微风','和风','轻劲风','强风','疾风','大风','烈风','狂风','暴风','台风','风王之王');
$winfo=' ';
$url='http://php.weather.sina.com.cn/xml.php?city=%bd%f0%bb%aa&password=DJOYnieT8234jlsK&day='.$i;
$ch=curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$output = curl_exec($ch);
curl_close($ch);
$outobj=simplexml_load_string($output);
$a=$outobj->Weather;
//为了方便拼接字符串
$b=$a->status1;//天气情况1代表白天
$c=$a->status2;//天气情况2代表晚上
$d=$a->direction1;//白天风向
$e=$a->direction2;//晚上风向
$dd=$a->power1;//白天风级数
$ee=$a->power2;//晚上风级数
if($c=="")$c=$b;//解决 当晚上和白天 天气一样时 变量ee值为空
//$winfo='金华天气';原本在这里（每循环一次就被清空一次这是错误的）
$winfo.= $arr[$week+$i].'白天'.$b.$d.$arrfeng[intval($dd)].'晚上'.$c.$e.$arrfeng[intval($ee)].'\n';
return $winfo;
}
$str0=get_weather(0);
$str1=get_weather(1);
$str2=get_weather(2);
$str3=get_weather(3);
echo '金华天气'.$str0.$str1.$str2.$str3;
?>The output is as follows:
Jinhua Weather Friday Thundershowers during the day, east wind calm, cloudy at night, east wind calm n Saturday, thundershowers during the day, east wind calm, evening cloudy east wind, calm n Sunday, cloudy during the day, east wind calm, evening clear, east wind calm, n Monday clear during the day, east wind calm, clear at night No wind n
