Undefined property: DOMNodeList::$textContent when to parse web - php

Question

In my code1,it can parse the web to get the td content for me.
code1
<?php
$url='http://www.sse.com.cn/marketservices/tradingservice/shhksc/eligible/';
$html = file_get_contents($url);
$dom = new DOMDocument();
#$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
$nodes = $xpath->query('//div[#id="hk_view"]//table[#class="tablestyle"]//tr//td[position()<4 and position()>1]');
foreach($nodes as $node){
echo $node->textContent.'</br>';}
?>
Now i change other format to parse the web.
code2
<?php
$url='http://www.sse.com.cn/marketservices/tradingservice/shhksc/eligible/';
$html = file_get_contents($url);
$dom = new DOMDocument();
#$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
$nodes = $xpath->query('//div[#id="hk_view"]//table[#class="tablestyle"]//tr');
foreach($nodes as $node){
$sub =$xpath->query('//td[position()<4 and position()>1]' ,$node);
echo $sub->textContent.'</br>';}
?>
Is the xpath expression wrong ?
$sub =$xpath->query('//td[position()<4 and position()>1]' ,$node);
It is the result of my code1.
According to har07's answer ,code2 was rewrite as code3,there is another problem remain,please test it with my code3 .
code3
<?php
$url='http://www.sse.com.cn/marketservices/tradingservice/shhksc/eligible/';
$html = file_get_contents($url);
$dom = new DOMDocument();
#$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
$nodes = $xpath->query('//div[#id="hk_view"]//table[#class="tablestyle"]//tr');
foreach($nodes as $node){
$sub =$xpath->query('//td[position()<4 and position()>1]' ,$node);
foreach($sub as $s){
echo $s->textContent.'</br>';
}
}
?>

Answer 1

The problem isn't in the xpath expression you use. As the error message suggests, query() returns DOMNodeList which doesn't have textContent property. It is DOMNode that have textContent.
You need to iterate through the DOMNodeList to access it's individual DOMNode member, and access textContent property on each DOMNode :
foreach($nodes as $node){
$sub = $xpath->query('.//td[position()<4 and position()>1]' ,$node);
foreach($sub as $s){
echo $s->textContent;
}
}