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POsimple_xml get max value of attribute
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  1. POsimple_xml get max value of attribute
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    copied!<p>I'm trying to get the maximum and the minimum value of the option-node for each item in the following xml (snippet):</p> <pre><code>&lt;body&gt; &lt;page number="1"&gt; &lt;itemset name="a"&gt; &lt;item id="1"&gt; &lt;option value="0"&gt;no&lt;/option&gt; &lt;option value="1"&gt;rarely&lt;/option&gt; &lt;option value="3"&gt;sometimes&lt;/option&gt; &lt;option value="5"&gt;often&lt;/option&gt; &lt;scale id="ho" /&gt; &lt;/item&gt; &lt;item id="2"&gt; &lt;option value="0"&gt;no&lt;/option&gt; &lt;option value="1"&gt;rarely&lt;/option&gt; &lt;option value="3"&gt;sometimes&lt;/option&gt; &lt;option value="5"&gt;often&lt;/option&gt; &lt;scale id="hi" /&gt; &lt;/item&gt; &lt;/itemset&gt; &lt;/page&gt; &lt;/body&gt; </code></pre> <p>I'm doing this within a foreach-loop...</p> <pre><code>... $scid="ho"; $total=0; $count=0; foreach ($txml-&gt;xpath("//item[scale/@id='$scid']") as $item) { $score=$rxml-&gt;xpath("//item[@id='".$item['id']."']"); // get a value from another simple_xml-object $total+=intval($score[0]); $count++; // ******* problem starts here... $values = $item-&gt;option['value']; // doing sth with $values to get max and min value echo '&lt;pre&gt;'; print_r($values); // ******* echo '&lt;/pre&gt;'; } // foreach $item ... </code></pre> <p>What I get in <code>$values</code> is</p> <pre><code>SimpleXMLElement Object ( [0] =&gt; 0 ) </code></pre> <p>with <code>$values = $item-&gt;xpath('option[@value]');</code> instead, I get...</p> <pre><code> Array ( [0] =&gt; SimpleXMLElement Object ( [@attributes] =&gt; Array ( [value] =&gt; 0 ) ) [1] =&gt; SimpleXMLElement Object ( [@attributes] =&gt; Array ( [value] =&gt; 1 ) ) [2] =&gt; SimpleXMLElement Object ( [@attributes] =&gt; Array ( [value] =&gt; 3 ) ) [3] =&gt; SimpleXMLElement Object ( [@attributes] =&gt; Array ( [value] =&gt; 5 ) ) ) </code></pre> <p>I am looking for a more straightforward solution - or how to get min and max from there.</p> <p>I'd like to get sth like <code>$values['max']=5</code> and <code>$values['min']=0</code></p> <p>Thank you in advance,</p> <p>Michi</p> <p>PS: as I wasn't able to get this working with simple_xml and didn't want to switch to DOM, I decided to do it quick and dirty with some basic PHP:</p> <pre><code>foreach ($item-&gt;xpath("//item[@id='".$item['id']."']/option/@value") as $value) { $v[]=(int)$value-&gt;value; } echo max($v); echo min($v); </code></pre>
 

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