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【前言】 以解析Google API 接口提供的天气情况为例,我们取今天的天气及气温。 【XML文件内容】 <?xml version="1.0"?> <xml_api_reply version="1"> <weather module_ > <forecast_information> <city data="Shenzhen, Guangdong"/> <postal_code data="shenzhen"/> <latitude_e6 data=""/> <longitude_e6 data=""/> <forecast_date data="2009-10-05"/> <current_date_time data="2009-10-04 05:02:00 +0000"/> <unit_system data="US"/> </forecast_information> <current_conditions> <condition data="Sunny"/> <temp_f data="88"/> <temp_c data="31"/> <humidity data="Humidity: 49%"/> <icon data="/ig/images/weather/sunny.gif"/> <wind_condition data="Wind: mph"/> </current_conditions> </weather> </xml_api_reply> 【使用DomDocument解析】 <?PHP header("Content-type:text/html; Charset=utf-8"); $url = "http://www.google.com/ig/api?weather=shenzhen"; // 加载XML内容 $content = file_get_contents($url); $content = get_utf8_string($content); $dom = DOMDocument::loadXML($content); /* 此处也可使用如下所示的代码, $dom = new DOMDocument(); $dom->load($url); */ $elements = $dom->getElementsByTagName("current_conditions"); $element = $elements->item(0); $condition = get_google_xml_data($element, "condition"); $temp_c = get_google_xml_data($element, "temp_c"); echo '天气:', $condition, '<br />'; echo '温度:', $temp_c, '<br />'; function get_utf8_string($content) { // 将一些字符转化成utf8格式 $encoding = mb_detect_encoding($content, array('ASCII','UTF-8','GB2312','GBK','BIG5')); return mb_convert_encoding($content, 'utf-8', $encoding); } function get_google_xml_data($element, $tagname) { $tags = $element->getElementsByTagName($tagname); // 取得所有的$tagname $tag = $tags->item(0); // 获取第一个以$tagname命名的标签 if ($tag->hasAttributes()) { // 获取data属性 $attribute = $tag->getAttribute("data"); return $attribute; }else { return false; } } ?> 这只是一个简单的示例,仅包括了loadXML, item, getAttribute,getElementsByTagName等方法,还有一些有用的方法,这个依据你的实际需要。 【XMLReader】 <?PHP header("Content-type:text/html; Charset=utf-8"); $url = "http://www.google.com/ig/api?weather=shenzhen"; // 加载XML内容 $xml = new XMLReader(); $xml->open($url); $condition = ''; $temp_c = ''; while ($xml->read()) { // echo $xml->name, "==>", $xml->depth, "<br>"; if (!empty($condition) && !empty($temp_c)) { break; } if ($xml->name == 'condition' && empty($condition)) { // 取第一个condition $condition = $xml->getAttribute('data'); } if ($xml->name == 'temp_c' && empty($temp_c)) { // 取第一个temp_c $temp_c = $xml->getAttribute('data'); } $xml->read(); } $xml->close(); echo '天气:', $condition, '<br />'; echo '温度:', $temp_c, '<br />'; 我们只是需要取第一个condition和第一个temp_c,于是遍历所有的节点,将遇到的第一个condition和第一个temp_c写入变量,最后输出。 【DOMXPath】 <?PHP header("Content-type:text/html; Charset=utf-8"); $url = "http://www.google.com/ig/api?weather=shenzhen"; // 加载XML内容 $dom = new DOMDocument(); $dom->load($url); $xpath = new DOMXPath($dom); $element = $xpath->query("/xml_api_reply/weather/current_conditions")->item(0); $condition = get_google_xml_data($element, "condition"); $temp_c = get_google_xml_data($element, "temp_c"); echo '天气:', $condition, '<br />'; echo '温度:', $temp_c, '<br />'; function get_google_xml_data($element, $tagname) { $tags = $element->getElementsByTagName($tagname); // 取得所有的$tagname $tag = $tags->item(0); // 获取第一个以$tagname命名的标签 if ($tag->hasAttributes()) { // 获取data属性 $attribute = $tag->getAttribute("data"); return $attribute; }else { return false; } } ?> 【xml_parse_into_struct】 该函数将 XML 文件解析到两个对应的数组中,index 参数含有指向 values 数组中对应值的指针。最后两个数组参数可由指针传递给函数。 <?PHP header("Content-type:text/html; Charset=utf-8"); $url = "http://www.google.com/ig/api?weather=shenzhen"; // 加载XML内容 $content = file_get_contents($url); $p = xml_parser_create(); xml_parse_into_struct($p, $content, $vals, $index); xml_parser_free($p); echo '天气:', $vals[$index['CONDITION'][0]]['attributes']['DATA'], '<br />'; echo '温度:', $vals[$index['TEMP_C'][0]]['attributes']['DATA'], '<br />'; 【Simplexml】 // Charset: utf-8 /** * 用php Simplexml 调用google天气预报api,和g官方的例子不一样 * google 官方php domxml 获取google天气预报的例子 * http://www.google.com/tools/toolbar/buttons/intl/zh-CN/apis/howto_guide.html * * @copyright Copyright (c) 2008 <cmpan(at)qq.com> * @license New BSD License * @version 2008-11-9 */ // 城市,用城市拼音 $city = empty($_GET['city']) ? 'shenzhen' : $_GET['city']; $content = file_get_contents("http://www.google.com/ig/api?weather=$city&hl=zh-cn"); $content || die("No such city's data"); $content = mb_convert_encoding($content, 'UTF-8', 'GBK'); $xml = simplexml_load_string($content); $date = $xml->weather->forecast_information->forecast_date->attributes(); $html = $date. "<br>\r\n"; $current = $xml->weather->current_conditions; $condition = $current->condition->attributes(); $temp_c = $current->temp_c->attributes(); $humidity = $current->humidity->attributes(); $icon = $current->icon->attributes(); $wind = $current->wind_condition->attributes(); $condition && $condition = $xml->weather->forecast_conditions->condition->attributes(); $icon && $icon = $xml->weather->forecast_conditions->icon->attributes(); $html.= "当前: {$condition}, {$temp_c}°C,<img src='http://www.google.com/ig{$icon}'/> {$humidity} {$wind} <br />\r\n"; foreach($xml->weather->forecast_conditions as $forecast) { $low = $forecast->low->attributes(); $high = $forecast->high->attributes(); $icon = $forecast->icon->attributes(); $condition = $forecast->condition->attributes(); $day_of_week = $forecast->day_of_week->attributes(); $html.= "{$day_of_week} : {$high} / {$low} °C, {$condition} <img src='http://www.google.com/ig{$icon}' /><br />\r\n"; } header('Content-type: text/html; Charset: utf-8'); print $html; ?>
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