- printf: documentation ( source)
<?php
$rawxml = '<?xml version="1.0"?><root><field attr1="val1"><field attr1="val1"/></field></root>';
$rawxpath = "/root[1]/field[@attr1='val1']";
$results = array();
for ($i = 0; $i < 10000; $i++) {
$xmlDocument = new DOMDocument();
$xmlDocument->loadXML($rawxml);
$xp = new DOMXPath($xmlDocument);
$xpr = $xp->evaluate($rawxpath, $xmlDocument->documentElement);
if (isset($results[(string) $xpr->length]))
$results[(string) $xpr->length]++;
else
$results[(string) $xpr->length] = 1;
}
foreach ($results as $matches => $count)
printf("In %5d instances, found $matches match(es) for $rawxpath\n", $count);