一个自动获取天气的PHP类

<?php /* * 日期： 2008.04.17 */ class weather{ public function __construct(){} /* * 功能： 获取访问者ip * 说明： 无参数，成功返回访问者ip字符串，失败返回null */ function getip(){ if ($_SERVER["HTTP_X_FORWARDED_FOR"]) { $ip = $_SERVER["HTTP_X_FORWARDED_FOR"]; } elseif ($_SERVER["HTTP_CLIENT_IP"]) { $ip = $_SERVER["HTTP_CLIENT_IP"]; } elseif ($_SERVER["REMOTE_ADDR"]) { $ip = $_SERVER["REMOTE_ADDR"]; } elseif (getenv("HTTP_X_FORWARDED_FOR")) { $ip = getenv("HTTP_X_FORWARDED_FOR"); } elseif (getenv("HTTP_CLIENT_IP")) { $ip = getenv("HTTP_CLIENT_IP"); } elseif (getenv("REMOTE_ADDR")) { $ip = getenv("REMOTE_ADDR"); } else { $ip = null; } return $ip; } /* * 功能： 通过用户指定的城市编码获取该城市信息 * 参数： $citycode为城市编码,$p为省份数组,$c为城市数组,$n为城市编码数组 */ function getcitybycode($citycode,$p,$c,$n){ $flag = true; foreach($n as $k => $arr){ if(in_array($citycode,$arr)){ $pkey = $k; $flag = false; break; } } if($flag){ $pkey = '0'; $ckey = '0'; $citycode = $n[$pkey][$ckey]; }else{ $ckeyarr = array_keys($n[$pkey],$citycode); $ckey = $ckeyarr[0]; } $city = array($citycode,$p[$pkey],$c[$pkey][$ckey],$pkey); return $city; } /* * 功能： 通过用户ip得到用户所在位置，然后获取该城市信息 * 参数： $citycode为城市编码,$p为省份数组,$c为城市数组,$n为城市编码数组 */ function getcitybyip($country,$p,$c,$n){ $pkey = $this->getkey($p,$country); //获取省份数组下标 $ckey = $this->getkey($c[$pkey],$country); //获取城市数组下标 $code = $n[$pkey][$ckey]; //取得相应省份所属的城市在中央天气预报信息库中的编码 $city= array($code,$country,$c[$pkey][$ckey],"$pkey"); return $city; } function getkey($arr,$country){ if(is_array($arr)){ foreach($arr as $key => $val){ if(preg_match('/('.$val.')/',$country,$match)){ return $key; } } }else{ if(preg_match('/('.$arr.')/',$country,$match)){ return $key; } } return 0; } /* * 功能： 通过城市编码从中央气象局天气预报页面抓取天气信息 * 参数： $citycode为城市编码 * 说明： 返回天气信息数组 */ function get_cma_weather($citycode){ if(!$htmlarr=file('http://www.cma.gov.cn/tqyb/weatherdetail/'.$citycode.'.html')){ //unset($weather); return $this->get_cma_weather($citycode); } list($dateregine,$weather['city']) = explode("&nbsp;&nbsp;&nbsp;",strip_tags($htmlarr['861'])); $arr['date'] = array($htmlarr['871'],$htmlarr['872'],$htmlarr['873']); $arr['weather'] = array($htmlarr['883'],$htmlarr['890'],$htmlarr['897']); $arr['temperature'] = array($htmlarr['917'],$htmlarr['918'],$htmlarr['919']); $winddirect = array($htmlarr['925'],$htmlarr['926'],$htmlarr['927']); unset($htmlarr); foreach($arr as $k => $v){ foreach($v as $key => $val){ $weather[$k][$key] = strip_tags($val); } } foreach($winddirect as $k => $v){ $weather['winddirect'][$k] = htmlspecialchars(eregi_replace('(.+)*"b-cn">(.+)*</td>',"\\2",$v)); } return $weather; } /* * 功能： 从指定的路径读取存储有天气信息的xml文件 * 参数： $filepath为文件路径 * 说明： 返回天气信息数组 */ function read_weather_xml($filepath){ $dom = new DomDocument(); $dom->load($filepath); $xp = new DOMXPath($dom); $citynodes = $dom->getElementsByTagName("city"); $nodes['date'] = $dom->getElementsByTagName("date"); $nodes['weather'] = $dom->getElementsByTagName("weather"); $nodes['temperature'] = $dom->getElementsByTagName("temperature"); $nodes['winddirect'] = $dom->getElementsByTagName("winddirect"); $weather['city'] = iconv("utf-8","gbk",$citynodes->item(0)->textContent); foreach($nodes as $k => $v){ foreach($v as $key => $val){ $weather[$k][$key] = iconv("utf-8","gbk",$val->textContent); } } //$weather['date'] = $xp->query("/weatherinfo/weather/date"); //$weather['weather'] = $xp->query("/weatherinfo/weather/weather"); //print_r($weather); return $weather; } /* * 功能： 将天气信息存储为指定的xml文件 * 参数： $cityweather，该城市天气信息$filepath为文件路径 */ function save_weather_xml($cityweather,$filepath){ $dom = new DomDocument(); $xmlstr = '<?xml version="1.0" encoding="gb2312"?>'; $xmlstr .= "<weatherinfo>"; $xmlstr .= "<city>".$cityweather['city']."</city>"; $datasize = count($cityweather['date']); for($i=0; $i<$datasize; $i++){ $xmlstr .= "<data>"; $xmlstr .=" <date>".$cityweather['date'][$i]."</date>"; $xmlstr .=" <weather>".$cityweather['weather'][$i]."</weather>"; $xmlstr .=" <temperature>".$cityweather['temperature'][$i]."</temperature>"; $xmlstr .=" <winddirect>".$cityweather['winddirect'][$i]."</winddirect>"; $xmlstr .="</data>"; } $xmlstr .="</weatherinfo>"; $dom->loadXML($xmlstr); $dom->save($filepath); } /* * 功能： 获取天气信息 * 参数： $city为天气信息数组 */ function getweather($city){ $pdir = WROOT.'/data/'.$city['3']; if(!file_exists($pdir)){ mkdir($pdir,0777); } $filepath = $pdir.'/'.$city['0'].'.xml'; if(!file_exists($filepath)){ $cityweather = $this->get_cma_weather($city['0']); $this->save_weather_xml($cityweather,$filepath); }else if(date("Ymd")>date("Ymd",filemtime($filepath))){ unlink($filepath); $cityweather = $this->get_cma_weather($city['0']); $this->save_weather_xml($cityweather,$filepath); } return $this->read_weather_xml($filepath); } /* * 功能： 将从xml文件中获取的天气信息用指定的模板显示出来 * 参数： $weather为天气信息数组,$phtml为模板文件,$model等于1获取当日天气，等于2获取48小时天气， * 等于3回去72小时天气 */ function weather_tmp_html($weather,$phtml,$model='3'){ if($model=='1'){ $array = array($weather['city'],$weather['date'][0],$weather['weather'][0],$weather['temperature'][0],$weather['winddirect'][0]); $replace_array = array('<{city}>','<{date}>','<{weather}>','<{temperature}>','<{winddirect}>'); }else if($model=='2'){ $array = array($weather['city'],$weather['date'][0],$weather['weather'][0],$weather['temperature'][0],$weather['winddirect'][0],$weather['date'][1],$weather['weather'][1],$weather['temperature'][1],$weather['winddirect'][1]); $replace_array = array('<{city}>','<{date}>','<{weather}>','<{temperature}>','<{winddirect}>','<{date1}>','<{weather1}>','<{temperature1}>','<{winddirect1}>'); }else{ $array = array($weather['city'],$weather['date'][0],$weather['weather'][0],$weather['temperature'][0],$weather['winddirect'][0],$weather['date'][1],$weather['weather'][1],$weather['temperature'][1],$weather['winddirect'][1],$weather['date'][2],$weather['weather'][2],$weather['temperature'][2],$weather['winddirect'][2]); $replace_array = array('<{city}>','<{date}>','<{weather}>','<{temperature}>','<{winddirect}>','<{date1}>','<{weather1}>','<{temperature1}>','<{winddirect1}>','<{date2}>','<{weather2}>','<{temperature2}>','<{winddirect2}>'); } if($html=file_get_contents($phtml)){ $html = str_replace($replace_array,$array,$html); }else{ $html = '获取天气信息失败'; } return $html; } } ?>