<?PHP
//- Describe:
//- Author: liuguichun
//- Link:
//- CreateTime: 2010-6-21
//- UpdateTime:
//- Package:
class weather {
static $url = 'http://www.google.com/ig/api?hl=zh-cn&weather=';
static $city = 'Beijing'; //默认城市北京
static $weatherXML = '';
/**
  * 获得远程xml并缓存到本地
  */
static public function getXML() {
  header ( 'Content-Type: text/html; charset = utf-8' );
  if (isset ( $_GET ['city'] )) {
   self:city = empty ( $_GET ['city'] ) ? 'Beijing' : $_GET ['city'];
  }
  $contents = file_get_contents ( self:url . self:city ) or die ( '查询出错' );
  self:weatherXML = date ( "Ymd" ) . '-' . self:city . '-weather.xml';
  if (is_file ( self:weatherXML )) {
   $fileTime = filemtime ( self:weatherXML );
   $stater = time () - $fileTime - 60 * 60 * 2;
   if ($stater < 0) {
    self::cacheXML ( $contents );
   }
   return true;
  }
  self::cacheXML ( $contents );
}
/**
  * 解析xml
  */
static public function analysisXML() {
  if (is_file ( self:weatherXML )) {
   $xml = simplexml_load_file ( self:weatherXML );
  } else {
   $xml = simplexml_load_file ( self:url . self:city );
  }
  $xml = ( array ) $xml;
  $city = ( array ) $xml ['weather']->forecast_information->city;
  if (isset ( $xml ['weather']->problem_cause )) {
   $problem = ( array ) $xml ['weather']->problem_cause;
   echo $problem ['@attributes'] ['data'];
   return;
  }
  
  $conditions = ( array ) $xml ['weather']->current_conditions->condition;
  $humidity = ( array ) $xml ['weather']->current_conditions->humidity;
  $temp_c = ( array ) $xml ['weather']->current_conditions->temp_c;
  $conditions_icon = ( array ) $xml ['weather']->current_conditions->icon;
  $wind_condition = ( array ) $xml ['weather']->current_conditions->wind_condition;
  $forecast = ( array ) $xml ['weather'];
  $forecast = ( array ) $forecast ['forecast_conditions'];
  $html = '';
  foreach ( $forecast as $key => $val ) {
   
   ${'day_of_week_' . $key} = ( array ) $val->day_of_week;
   ${'low_' . $key} = ( array ) $val->low;
   ${'high_' . $key} = ( array ) $val->high;
   ${'icon_' . $key} = ( array ) $val->icon;
   ${'condition_' . $key} = ( array ) $val->condition;
   $html .= "<DIV class=w_fc title={${'condition_'.$key}['@attributes']['data']}>{${'day_of_week_'.$key}['@attributes']['data']}<BR>
        <IMG class=w_fci alt={${'condition_'.$key}['@attributes']['data']} src=\"http://www.google.com{${'icon_'.$key}['@attributes']['data']}\ " width=40 height=40><BR>
        <NOBR>{${'low_'.$key}['@attributes']['data']}°C | {${'high_'.$key}['@attributes']['data']}°C</NOBR></DIV>";
  
  }
  self::printCss ();
  echo <<<weather
  <DIV>
  <DIV style="ADDING-TOP: 2px" class=modlabel><A style="COLOR: #00c; FONT-WEIGHT: bold" class=w_lnk href="#">{$city['@attributes']['data']}</A></DIV>
  <DIV class=w_box>
    <DIV class=w_ccs>
      <DIV class=w_ccis><IMG id=w_4_c0_icon class=w_cci alt="{$city['@attributes']['data']}({$conditions['@attributes']['data']})" src="http://www.google.com{$conditions_icon['@attributes']['data' ]}" width=40 height=40><BR>
      </DIV>
      <DIV id=w_4_c0_temp class=w_cc_temp>{$temp_c['@attributes']['data']}°C</DIV>
      <DIV id=w_4_c0_text class=w_cc_text>当前： {$conditions['@attributes']['data']}< BR>
        {$wind_condition['@attributes']['data']}<BR>
        {$humidity['@attributes']['data']}</DIV>
    </DIV>
    <DIV id=w_4_c0_fcs class=w_fcs>
$html
    </DIV>
  </DIV>
</DIV>
weather;

}
/**
  * 打印样式
  */
static public function printCss() {
  echo <<<css
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
td, div, span, p { font-family:arial, sans-serif; font-size:10pt; margin:0}
.w_fci {BORDER-BOTTOM: #bbc 1px solid;BORDER-LEFT: #bbc 1px solidADDING-BOTTOM: 1pxADDING-LEFT: 1px;WIDTH: 40pxADDING-RIGHT: 1px; HEIGHT: 40px;BORDER-TOP: #bbc 1px solid;BORDER-RIGHT: #bbc 1px solidADDING-TOP: 1px}
.w_fc { TEXT-ALIGN: center; PADDING-BOTTOM: 0pxADDING-LEFT: 0pxADDING-RIGHT: 10px;FLOAT: left;HEIGHT: 80pxADDING-TOP: 0px}
.w_fcs {PADDING-BOTTOM: 0pxADDING-LEFT: 0pxADDING-RIGHT: 0px;OVERFLOW: hiddenADDING-TOP: 2px}
.w_box {PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 1px}
.w_ccs {PADDING-BOTTOM: 2px; PADDING-LEFT: 2px; PADDING-RIGHT: 2px; PADDING-TOP: 2px}
.w_ccis {PADDING-BOTTOM: 1px; PADDING-LEFT: 1px; PADDING-RIGHT: 1px; FLOAT: left; PADDING-TOP: 1px}
.w_cci {BORDER-BOTTOM: #bbc 1px solid; BORDER-LEFT: #bbc 1px solid; PADDING-BOTTOM: 1px; PADDING-LEFT: 1px; WIDTH: 40px; PADDING-RIGHT: 1px; HEIGHT: 40px; BORDER-TOP: #bbc 1px solid; BORDER-RIGHT: #bbc 1px solid; PADDING-TOP: 1px}
.w_cc_temp {PADDING-BOTTOM: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 10px; FLOAT: left; FONT-SIZE: 180%; PADDING-TOP: 0px}
.w_cc_text {HEIGHT: 60px; OVERFLOW: hidden}
.w_lnk {COLOR: #00c}
.modlabel { padding-bottom:2px; padding-top:5px;}
</style>
css;
}
/**
  * 创建xml缓存
  * @param $contents 要缓存的内容
  */
static private function cacheXML($contents) {
  $contents = str_ireplace ( '<?xml version="1.0"?>', "<?xml version=\"1.0\"?> \n", $contents );
  $contents = mb_convert_encoding ( $contents, 'utf-8', 'gbk' );
  file_put_contents ( self:weatherXML, $contents ) or die ( '没有写权限' );
}
}
weather::getXML ();
weather::analysisXML ();