Question

我试图在div类中提取html的所有p标签的内容，并尝试将整个流插入一个变量数组

这是html代码示例

<html>
...
<div class=news-box>

   <h2>Heading</h2>
   <p>afsdfdfha adhfaksdhf adfhakhf adfhaskfdha fsahfkasdhfaasfdjhasdf ahdfkahsd</p>
   <p>afsdfdfha adhfaksdhf adfhakhf adfhaskfdha fsahfkasdhfaasfdjhasdf ahdfkahsd</p>
   <p>afsdfdfha adhfaksdhf adfhakhf adfhaskfdha fsahfkasdhfaasfdjhasdf ahdfkahsd</p>
   <p>yuoyuouoyuoyuyu oyuiouioyuioyuyiouyoiy youyoiyuioyuioyuyoiuyiuyiyuioyu yuyiu</p>
</div>
...
</html>

我想提取p中的所有内容并尝试将整个流插入变量以插入数据库，我在下面使用这些php代码

<?php

include('simple_html_dom.php');

$url = 'http://www.example.com';

$html1=file_get_html($url);
$content=array();
foreach($html1->find('div.story-box p') as $e)
{
    $content=$e;
}
echo $content;
?>

为什么它只显示最后一行...想要在一个变量$e中分配后显示p标签中的所有内容

Answer 1

在循环中，您在每次迭代时重新分配$content。你想要的是：

foreach($html1->find('div.story-box p') as $e)
{
    $content[] =$e;
}
var_dump($content);

Answer 2

temp1.html

   <html>
   <head><title></title></head>
   <body>
    <div  id="text">
    <h2>Heading</h2>
    <p>afsdfdfha adhfaksdhf adfhakhf adfhaskfdha fsahfkasdhfaasfdjhasdf ahdfkahsd</p>
     <p>afsdfdfha adhfaksdhf adfhakhf adfhaskfdha fsahfkasdhfaasfdjhasdf ahdfkahsd</p>
     <p>afsdfdfha adhfaksdhf adfhakhf adfhaskfdha fsahfkasdhfaasfdjhasdf ahdfkahsd</p>
    <p>yuoyuouoyuoyuyu oyuiouioyuioyuyiouyoiy youyoiyuioyuioyuyoiuyiuyiyuioyu yuyiu</p>
   </div>
    </body>
    </html

temp1.php

   <?php
      include("simplehtmldom_1_5/simple_html_dom.php");
      $url = 'http://localhost/temp1.html';
      $html=file_get_html($url);
      $content=array();
      $a="";
     foreach($html->find('div[id=text] p') as $e)
     {
       $a .=$e->plaintext." ";
       // echo $e->plaintext."<br>";
     }
     echo "$a";
   ?>

Answer 3

如果您对打印数组感到困惑（顺便使用print_r()），只需连接字符串：

$contents = '';
foreach($html1->find('div.story-box p') as $e) {
    $contents .= $e;
    // or $contents .= $e . '<br/>';
}

echo $contents;

如何使用php提取p标签内的所有内容

3 个答案: