How to get value of onclick= using xpath? - php

Question

I have a string that has lots of <li> sets of data. I want to get this value:
1: call.php?category=fruits&fruitid=123456
inside onclick using xpath . My current xpath doesn't get me the onclick value so I parse it further to get my required data ! Could any one tell me what is the correct xpath to get value of onclick?
libxml_use_internal_errors(true);
$dom = new DOMDocument;
$dom->loadHTML($code2);
$xpath = new DOMXPath($dom);
// Empty array to hold all links to return
$result = array();
//Loop through each <li> tag in the dom
foreach($dom->getElementsByTagName('li') as $li) {
//Loop through each <a> tag within the li, then extract the node value
foreach($li->getElementsByTagName('a') as $links){
$result[] = $links->nodeValue;
echo $result[0] . "\n";
}
$onclicks = $xpath->query("//li/a/onclick");
foreach ($onclicks as $onclick) {
echo $onclick->nodeValue . "\n";
}
}
data:
<li><a id="FR123456" onclick="setFood(false);setSeasonFruitID('123456');getit('call.php?category=fruits&fruitid=123456&',detailFruit,false);">mango season</a><img src="http://imagehosting.com/images/fru_123456.png">
</li>

Answer 1

onclick is an attribute, and you use #attribute_name to reference attribute in XPath :
$onclicks = $xpath->query("//li/a/#onclick");
foreach ($onclicks as $onclick) {
echo $onclick->nodeValue . "\n";
}

Answer 2

Try something like this :
$onclicks = $xpath->query("//li/a");
foreach ($links as $link) {
echo $link->getAttribute('onclick'). "\n";
}