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I just found a XML file with weather station data placed on local school - finally I got a source to get local weather.
Please check the file structure http://www.zsvelkebilovice.cz:40010/xml.xml
It's kinda crazy, because there aren't tags named by sensors, but tags with another option .
Is there any option to parse XMLs like this? Same format uses Day One iOS app to store entries in diary - date, weather, GPS and another data arent in specific tags but in tags option.
And I suppose there is a PHP parser which makes me able to access data by $xml->wario->input->sensor->temperature ? Because the only one solution without parser like this is to count the sensor order and acces it by $wario->input->sensor[order] and I can't be use if they don't change the order of tags (or add / delete some).
I can create my own parser but I still think there is a library for this :)
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You're using SimpleXML at the moment. SimpleXML has a method xpath() that allows you to fetch elements. This encapsulates the Xpath object from DOM. DOMXpath::evaluate() allows you to extract the values directly.
// stripped down xml for testing
$xml = <<<'XML'
<wario><input>
<sensor>
<type>humidity</type><id>1011</id><name>Humidity</name><value>100.0</value>
</sensor>
<sensor>
<type>pressure</type><id>1012</id><name>Pressure</name><value>1011.0</value>
</sensor>
<sensor>
<type>temperature</type><id>1025</id><name>T285b30061</name><value>-0.4</value>
</sensor>
</input></wario>
XML;
// some bootstrap
$dom = new DOMDocument();
$dom->loadXml($xml);
$xpath = new DOMXpath($dom);
// fetch the value of the first temperature sensor
$temperature = $xpath->evaluate('number(//sensor[type = "temperature"]/value)');
// fetch sensors with the id 1011
$sensors = $xpath->evaluate('//sensor[id = 1011]');
// get the first one
$sensor = $sensors->item(0);
// get some data from the sensor node
$data = array(
'type' => $xpath->evaluate('string(type)', $sensor),
'name' => $xpath->evaluate('string(name)', $sensor),
'value' => $xpath->evaluate('number(value)', $sensor)
);
var_dump($temperature, $data);
Output:
float(-0.4)
array(3) {
["type"]=>
string(8) "humidity"
["name"]=>
string(8) "Humidity"
["value"]=>
float(100)
}