Parse PHP using simplexml for field values - php

Question

Trying to parse the following xml:
<?xml version="1.0"?>
<devices>
<device name="TEMP" index="0" available="1" type="" id="xxx">
<field type="2" max="50" min="-20" niceName="Temperature (C)" value="24.75" key="TempC"/>
<field type="2" max="122" min="-4" niceName="Temperature (F)" value="76.55" key="TempF"/>
and pull the TempF value of 76.55.
This is the code I was trying, but I'm not doing something isn't right:
$xml = simplexml_load_file('c:\data.xml') or die("Error: Cannot create object");
echo '<h2>Server Temperature</h2>';
$list = $xml->devices;
for ($i = 0; $i < count($list); $i++) {
echo 'Temp: ' .$list[$i]->TempF[value] . '<br>';

Answer 1

You can loop $devices->device instead without instead of using a for loop
echo '<h2>Server Temperature</h2>';
foreach ($xml->device as $device) {
foreach ($device->field as $field) {
$att = $field->attributes();
if ((string)$att->key === "TempF") {
echo 'Temp: ' . $field->attributes()->value . "<br>";
}
}
}
Output
<h2>Server Temperature</h2>Temp: 76.55<br>
See a Php demo
Or if you want to loop all the values of field, you can use xpath:
echo '<h2>Server Temperature</h2>';
foreach ($xml->xpath('/devices/device/field[#key="TempF"]/#value') as $value) {
echo 'Temp: ' . $value . "<br>";
}
Output
<h2>Server Temperature</h2>Temp: 76.55<br>
See another Php demo