Hi all. I'm trying to use XPath avg(), min() and max() functions
without success. Others functions like count() or sum() works correctly.
Here is the code I'm using (PHP 5.1):
<?php
$xml_str = '
<stats>
<cards>
<card name="My card">
<type name="visits">25</type>
<type name="clicks">7</type>
</card>
<card name="My other card">
<type name="visits">50</type>
<type name="clicks">3</type>
</card>
</cards>
</stats>
';
$xml_doc = new DOMDocument();
$xml_doc->loadXML($xml_str);
$xpath = new DOMXPath($xml_doc);
$cards_avg = $xpath->evaluate("avg(//card/[EMAIL PROTECTED]'visits'])");
var_dump($cards_avg);
$cards_sum = $xpath->evaluate("sum(//card/[EMAIL PROTECTED]'visits'])");
var_dump($cards_sum);
?>
I receive the following output:
[EMAIL PROTECTED]:/tmp$ php test.php
PHP Warning: DOMXPath::evaluate(): xmlXPathCompOpEval: function avg not
found in /tmp/test.php on line 23
Warning: DOMXPath::evaluate(): xmlXPathCompOpEval: function avg not found
in /tmp/test.php on line 23
PHP Warning: DOMXPath::evaluate(): Unregistered function in /tmp/test.php
on line 23
Warning: DOMXPath::evaluate(): Unregistered function in /tmp/test.php on
line 23
object(DOMNodeList)#5 (0) {
}
float(75)
[EMAIL PROTECTED]:/tmp$
Someone can help me?
Thanks in advance
Alex
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