php采集自中央气象台范围覆盖全国的天气预报代码实例_php技巧

天气预报信息采集自中央气象台,信息准确,覆盖面广,代码简单,返回是json代码,可以用于客户端调用,也可以在服务器端处理后显示,笔者的wordpress天气预报插件就是使用的这段代码,需要注意的是,这段代码会在服务器产生缓存文件,需要在当前目录中新建data文件夹,保证文件夹可写.

php天气预报代码如下:
代码如下:/*
作者： freemouse
主页： www.cnphp.info
接口demo： http://www.cnphp.info/tianqi
用法： 可以直接调用上面的地址会显示当地的天气信息，也可以这样用
http://www.cnphp.info/tianqi/?q=江苏省南京市
**/

$p = $_get['q'];
$k = 0;
$encoding = mb_detect_encoding($p);
if($encoding != "utf-8"){
$p = mb_convert_encoding($p,"utf-8","gbk");
}
$p_arr = array(
"01" => "北京",
"02" => "上海",
"03" => "天津",
"04" => "重庆",
"05" => "黑龙江",
"06" => "吉林",
"07" => "辽宁",
"08" => "内蒙古",
"09" => "河北",
"10" => "山西",
"11" => "陕西",
"12" => "山东",
"13" => "新疆",
"14" => "西藏",
"15" => "青海",
"16" => "甘肃",
"17" => "宁夏",
"18" => "河南",
"19" => "江苏",
"20" => "湖北",
"21" => "浙江",
"22" => "安徽",
"23" => "福建",
"24" => "江西",
"25" => "湖南",
"26" => "贵州",
"27" => "四川",
"28" => "广东",
"29" => "云南",
"30" => "广西",
"31" => "海南",
"32" => "香港",
"33" => "澳门",
"34" => "台湾"
);

function find(&$item,$key,$data){
global $k;
if(preg_match("/$item/u",$data)){
$k = $key;
}
}

function get_data_arr($key){
if(!file_exists("./data/city{$key}.xml")){
$c =file_get_contents( "http://m.weather.com.cn/data5/city{$key}.xml" );
file_put_contents("./data/city{$key}.xml",$c);
}
else{
$c = file_get_contents("./data/city{$key}.xml");
}
$arr = explode(",",$c);
foreach($arr as $v){
$data = explode("|",$v);
$ret[$data[0]] = $data[1];
}
return $ret;
}

array_walk($p_arr,'find',$p);
array_walk(get_data_arr($k),'find',$p);
array_walk(get_data_arr($k),'find',$p);
$ccode = get_data_arr($k);
echo file_get_contents("http://m.weather.com.cn/data/{$ccode[$k]}.html");

希望本文所述对大家的php程序设计有所帮助。