PHP获取当天和72小时天气预报，并生成接口

<?php
    include('./include/encode.func.php');
     
    $city = $_GET['city'] ? intval($_GET['city']) : 212; //cq
    $type = $_GET['type'] ? strtolower(trim($_GET['type'])) : 'json'; //json
    $charset = $_GET['charset'] ? strtolower(trim($_GET['charset'])) : 'utf-8'; //charset
    $dateType = $_GET['datetype'] ? strtolower(trim($_GET['datetype'])) : 'unix'; //dateType
     
    if($city < 1)
        exit();
     
    /*Get Weather*/
    $content = '';
    $fp = fopen('http://weather.news.qq.com/inc/07_dc' . $city . '.htm','r');
    while(!feof($fp))
        $content .= fread($fp,1024);
    fclose($fp);
     
    $content = str_replace(array("\t","\r","\n"),'',$content);
    $content = anystring2utf8($content);
    $weather = array();
     
    $a = array();
    preg_match('/class="px14\stred"><strong>(.[^\&]*)\&#160;(.[^<]*)<\/strong>/i',$content,$a);
    $weather['area'] = trim($a[2]);
    $weather['now']['date'] = parseDate($a[1]);
     
    preg_match('/<img\swidth="64"\sheight="64"\ssrc="(.[^"]*)"/i',$content,$a);
    $weather['now']['pic'] = trim($a[1]);
    preg_match('/bgcolor="#EDF2F8" class="blues">(.[^<]*)<br>(.[^<]*)<\/td>/i',$content,$a);
    $weather['now']['weather'] = trim($a[1]);
    $weather['now']['temp'] = trim($a[2]);
    preg_match('/class="explain\sblues">(.[^<]*)<br>\s*(.[^<]*)<br>\s*(.[^<]*)</i',$content,$a);
    $weather['now']['wind'] = parseMore($a[1]);
    $weather['now']['uv'] = parseMore($a[2]);
    $weather['now']['air'] = parseMore($a[3]);
     
    preg_match_all('/bgcolor="#EEEEEE">(.[^<]*)<\/td>(.[^-]*)bgcolor="#EEF3F8">(.[^<]*)<br>(.[^<]*)<br>(.[^<]*)/i',$content,$a);
     
    foreach($a[0] as $k => $v){
        $weather['future72'][$k] = array(
            'date' => $dateType == 'unix' ? strtotime(trim($a[1][$k])) : trim($a[1][$k]),
            'weather' => trim($a[3][$k]),
            'temp' => trim($a[4][$k]),
            'wind' => trim($a[5][$k]),
            'pic' => parsePic($a[2][$k])
        );
    }
    /*Get exponent*/
    $weather['exponent'] = array();
    $content = '';
    $fp = fopen('http://weather.news.qq.com/inc/07_zs' . $city . '.htm','r');
    while(!feof($fp))
        $content .= fread($fp,1024);
    fclose($fp);
    $content = str_replace(array("\t","\r","\n"),'',$content);
    $content = anystring2utf8($content);
    preg_match_all('/<strong>(.[^<]*)<\/strong>:<span\sclass="tred">(.[^<]*)<\/span>.[^:]*width="180">(.[^<]*)<\/td>/i',$content,$a);
    foreach($a[0] as $k => $v) {
        $weather['exponent'][$k] = array(
            'name' => trim($a[1][$k]),
            'value' => trim($a[2][$k]),
            'memo' => trim($a[3][$k])
        );
    }
     
    /*Print Result*/
    if ($charset != 'utf-8' && $charset != 'utf8')
        $weather = any2gbk($weather);
         
    switch($type) {
        case 'json':
            echo json_encode($weather);
            break;
        case 'xml':
            header("content-type:text/xml");
            $ax = new array2xml($weather,$charset);
            echo $ax->getXML();
            break;
        default:
            echo '<pre>';
            print_r($weather);
            echo '</pre>';
        break;
    }
 
     
     
    function parseDate($date) {
        $str = $date;
        $str = preg_replace('/([^\d])/',' ',$str);
        $str = trim($str);
        $str = str_replace('   ','-',$str);
        return $dateType == 'unix' ? strtotime($str) : $str;
    }
     
    function parseMore($str){
        $str = trim($str);
        $tmp = explode(iconv('gbk','UTF-8','：'),$str);
        return $tmp[1];
    }
     
    function parsePic($str) {
        $a = array();
        preg_match_all('/src="(.[^"]*)"/i',$str,$a);
        $result = $a[1];
        return $result;
    }
     
    class array2xml {
        var $xml;
        function array2xml($array,$encoding='gbk') {
            $this->xml='<?xml version="1.0" encoding="'.$encoding.'"?>';
            if(count($array) > 1) {
                $array = array('catalog' => $array);
            }
            $this->xml .= $this->_array2xml($array);
 
        }
        function getXml() {
            return $this->xml;
        }
        function _array2xml($array) {
            foreach($array as $key=>$val) {
                is_numeric($key) && $key = "item id=\"$key\"";
                $xml.= "<$key>";
                $xml.= is_array($val) ? $this->_array2xml($val) : $val;
                list($key,) = explode(' ',$key);
                $xml .= "</$key>";
            }
            return $xml;
        }
}
     
?>

<?php
/**
 * 任何编码字符串转换为utf-8
 *
 * @param string $str 输入字符串
 * @return string 输出utf-8编码字符串
 */
function anystring2utf8($str) {
    $encode = mb_detect_encoding($str,"ASCII,UNICODE,UTF-8,GBK,CP936,EUC-CN,BIG-5,EUC-TW");
    return ($encode != 'UTF-8' && $encode != 'ASCII' ? iconv($encode,'UTF-8',$str) : $str);
}
/**
 * 任何编码字符串转换为gbk
 *
 * @param string $str 输入字符串
 * @return string 输出gbk编码字符串
 */
function anystring2gbk($str) {
    $encode = mb_detect_encoding($str,"ASCII,UNICODE,UTF-8,GBK,CP936,EUC-CN,BIG-5,EUC-TW");
    return ($encode != 'CP936' && $encode != 'ASCII' && $encode != 'GBK' ? iconv($encode,'GB18030',$str) : $str);
}
 
/**
 * 任何编码字符串(数组)转换为utf-8
 *
 * @param mixed $string 输入字符串(数组)
 * @return mixed 输出utf-8编码字符串(数组)
 */
function any2utf8($string) {//通过递归转换字符串编码
    if(is_array($string)) {
        foreach($string as $key => $val) {
            $string[$key] = any2utf8($val); //递归
        }
    } else {
        $string = anystring2utf8($string);
    }
    return $string;
}
/**
 * 任何编码字符串(数组)转换为gbk
 *
 * @param mixed $string 输入字符串(数组)
 * @return mixed 输出gbk编码字符串(数组)
 */
function any2gbk($string) {//通过递归转换字符串编码
    if(is_array($string)) {
        foreach($string as $key => $val) {
            $string[$key] = any2gbk($val); //递归
        }
    } else {
        $string = anystring2gbk($string);
    }
    return $string;
}
?>