试图在 C:\xampp\htdocs\tables\index.php 中获取非对象的 属性

Trying to get property of non-object in C:\xampp\htdocs\tables\index.php

我正在使用以下代码,但出现了一些错误提示 -

Trying to get property of non-object in C:\xampp\htdocs\tables\index.php.

我有以下代码-

<?php
require 'simple_html_dom.php';

$html = file_get_html('http://mkp.gem.gov.in/oem-cartridge/samsung-111s-toner-rst/p-5116877-68482402616-cat.html');

foreach($html->find('div#sellers-table-wrap table tbody tr') as $article) {
    $item['name']   = $article->find('td.seller-name div.seller-info span.seller-info-caption', 0)->plaintext;
    $item['price']  = $article->find('td.offer-price span.variant-final-price span.m-w', 0)->plaintext;
    $articles[] = $item;
}
echo "<pre>";
print_r($articles);

?>

更新:我也试过了,但没用:

    foreach($html->find('div#sellers-table-wrap table tbody tr') as $article) {
  if (count($article->find('td.seller-name div.seller-info span.seller-info-caption')) > 0) {
    $item['name']   = $article->find('td.seller-name div.seller-info span.seller-info-caption', 0)->plaintext;
    $item['price']   = $article->find('td.offer-price span.variant-final-price span.m-w', 0)->plaintext;
  }
    $articles[] = $item;
}
echo "<pre>";
print_r($articles);

将循环中的选择器更改为:

foreach($html->find('div#sellers-table-wrap > table > tbody > tr') as $article) {

此 table 中还嵌套了其他 table,因此您也将遍历它们的行。但是它们没有与您用于分配给 $item['name']$item['price'] 的选择器相匹配的元素,因此那些 find() 调用返回 null,这会导致错误.此选择器仅匹配顶级 table.

中的行

您还可以添加支票:

foreach($html->find('div#sellers-table-wrap > table > tbody > tr') as $article) {
    $item = array();
    $caption = $article->find('td.seller-name div.seller-info span.seller-info-caption', 0);
    $mw = $article->find('td.offer-price span.variant-final-price span.m-w', 0);
    if ($caption && $mw) {
        $item['name'] = $caption->plaintext;
        $item['price'] = $mw->plaintext;
        $articles[] = $item;
    }
}