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Thread: Extracting data from xml file

  1. #1
    Join Date
    Jan 2012
    Posts
    2

    Extracting data from xml file

    I'm trying to include a weather forecast into my webpage using php - the xmlhttprequest returns an xml file. Below is the code I've used but I just get a blank page, can someone help? This is my first attempt at using xmlhttprequest and xml files so forgive all errors.

    Code:
    <?php
    include 'weather.php';
    $xml= new SimpleXMLElement($xmlstr);
    $weatherData = $xml->xpath('date/tempMaxC/tempMinC/tempMaxF/tempMinF/weatherDesc');
    while(list(, $node) = each($weatherData)) {
    echo '/date/tempMaxC/tempMinC/tempMaxF/tempMinF/weatherDesc ',$node,"\n";
    }
    ?>
    weather.php is a file I've set up to learn this stuff and contains the following data which is sent by the weather service I'm using:
    Code:
    <?php
    $xmlstr = <<<XML
    <?xml version='1.0' standalone='yes'?>
    <data><request><type>Zipcode</type><query>80487</query></request><current_condition><observation_time>10:14 AM</observation_time><temp_C>-2</temp_C><temp_F>29</temp_F><weatherCode>122</weatherCode><weatherIconUrl>http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png</weatherIconUrl><weatherDesc>Overcast </weatherDesc><windspeedMiles>16</windspeedMiles><windspeedKmph>26</windspeedKmph><winddirDegree>240</winddirDegree><winddir16Point>WSW</winddir16Point><precipMM>4.3</precipMM><humidity>81</humidity><visibility>16</visibility><pressure>1001</pressure><cloudcover>100</cloudcover></current_condition>
    <weather><date>2012-01-22</date><tempMaxC>-4</tempMaxC><tempMaxF>24</tempMaxF><tempMinC>-15</tempMinC><tempMinF>5</tempMinF><windspeedMiles>21</windspeedMiles><windspeedKmph>35</windspeedKmph><winddirection>W</winddirection><winddir16Point>W</winddir16Point><winddirDegree>274</winddirDegree><weatherCode>323</weatherCode><weatherIconUrl>http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0011_light_snow_showers.png</weatherIconUrl><weatherDesc>Patchy light snow</weatherDesc><precipMM>10.9</precipMM></weather>
    <weather><date>2012-01-23</date><tempMaxC>-1</tempMaxC><tempMaxF>30</tempMaxF><tempMinC>-15</tempMinC><tempMinF>5</tempMinF><windspeedMiles>8</windspeedMiles><windspeedKmph>12</windspeedKmph><winddirection>SW</winddirection><winddir16Point>SW</winddir16Point><winddirDegree>220</winddirDegree><weatherCode>116</weatherCode><weatherIconUrl>http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0002_sunny_intervals.png</weatherIconUrl><weatherDesc>Partly Cloudy </weatherDesc><precipMM>0.8</precipMM></weather><weather><date>2012-01-24</date><tempMaxC>-1</tempMaxC><tempMaxF>30</tempMaxF><tempMinC>-14</tempMinC><tempMinF>6</tempMinF><windspeedMiles>9</windspeedMiles><windspeedKmph>14</windspeedKmph><winddirection>W</winddirection><winddir16Point>W</winddir16Point><winddirDegree>274</winddirDegree><weatherCode>119</weatherCode><weatherIconUrl>http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0003_white_cloud.png</weatherIconUrl><weatherDesc>Cloudy </weatherDesc><precipMM>0.6</precipMM></weather><weather><date>2012-01-25</date><tempMaxC>1</tempMaxC><tempMaxF>34</tempMaxF><tempMinC>-15</tempMinC><tempMinF>6</tempMinF><windspeedMiles>6</windspeedMiles><windspeedKmph>9</windspeedKmph><winddirection>SSW</winddirection><winddir16Point>SSW</winddir16Point><winddirDegree>200</winddirDegree><weatherCode>113</weatherCode><weatherIconUrl>http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png</weatherIconUrl><weatherDesc>Sunny</weatherDesc><precipMM>0.1</precipMM></weather><weather><date>2012-01-26</date><tempMaxC>4</tempMaxC><tempMaxF>39</tempMaxF><tempMinC>-6</tempMinC><tempMinF>21</tempMinF><windspeedMiles>7</windspeedMiles><windspeedKmph>11</windspeedKmph><winddirection>SSW</winddirection><winddir16Point>SSW</winddir16Point><winddirDegree>200</winddirDegree><weatherCode>119</weatherCode><weatherIconUrl>http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0003_white_cloud.png</weatherIconUrl><weatherDesc>Cloudy </weatherDesc><precipMM>0.7</precipMM></weather></data>
    XML;
    ?>

  2. #2
    Join Date
    Jan 2012
    Posts
    2
    Here's what I've used which gets what I need.
    Code:
    <?php
    include 'weather.php';
    $data= new SimpleXMLElement($xmlstr);
    foreach ($data->weather as $weather) {
    
    	$date = (string) $weather->date;
    	$maxC = (int) $weather->tempMaxC;
    	$minC = (int) $weather->tempMinC;
    	$maxF = (int) $weather->tempMaxF;
    	$minF = (int) $weather->tempMinF;
    	$desc = (string) $weather->weatherDesc;
    	$iconUrl = (string) $weather->weatherIconUrl;
    
    echo '<ul id="forecast"> <li class="fcdate">' . $date .  '</li><li>' .$maxC . '</li><li>' .
    $minC . '</li><li>' . $maxF . '</li><li>' . $minF . '</li><li>' . $desc . '</li><li>' . $iconUrl . '</li>
    </ul>';
    }
    ?>

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