使用 file_get_contents 将 html 表解析为 php 数组

Parse html table using file_get_contents to php array

提问by Farhan Ahmad

I am trying to parse the table shown hereinto a multi-dimensional php array. I am using the following code but for some reason its returning an empty array. After searching around on the web, I found this sitewhich is where I got the parseTable() function from. From reading the comments on that website, I see that the function works perfectly. So I'm assuming there is something wrong with the way I'm getting the HTML code from file_get_contents(). Any thoughts on what I'm doing wrong?

我正在尝试将此处显示的表解析为多维 php 数组。我正在使用以下代码，但由于某种原因它返回一个空数组。在网上搜索后，我找到了这个网站，我从那里得到了 parseTable() 函数。通过阅读该网站上的评论，我发现该功能运行良好。所以我假设我从 file_get_contents() 获取 HTML 代码的方式有问题。对我做错了什么有任何想法吗？

<?php

$data = file_get_contents('http://flow935.com/playlist/flowhis.HTM');

function parseTable($html)
{
  // Find the table
  preg_match("/<table.*?>.*?<\/[\s]*table>/s", $html, $table_html);

  // Get title for each row
  preg_match_all("/<th.*?>(.*?)<\/[\s]*th>/", $table_html[0], $matches);
  $row_headers = $matches[1];

  // Iterate each row
  preg_match_all("/<tr.*?>(.*?)<\/[\s]*tr>/s", $table_html[0], $matches);

  $table = array();

  foreach($matches[1] as $row_html)
  {
    preg_match_all("/<td.*?>(.*?)<\/[\s]*td>/", $row_html, $td_matches);
    $row = array();
    for($i=0; $i<count($td_matches[1]); $i++)
    {
      $td = strip_tags(html_entity_decode($td_matches[1][$i]));
      $row[$row_headers[$i]] = $td;
    }

    if(count($row) > 0)
      $table[] = $row;
  }
  return $table;
}

$output = parseTable($data);

print_r($output);

?>

I want my output array to look something like this:

我希望我的输出数组看起来像这样：

1
--> 11:33AM
--> DEV
--> IN THE DARK

2
--> 11:29AM
--> LIL' WAYNE
--> SHE WILL

3
--> 11:26AM
--> KARDINAL OFFISHALL
--> NUMBA 1 (TIDE IS HIGH)

回答by jsalonen

Don't cripple yourself parsing HTML with regexps!Instead, let an HTML parser library worry about the structure of the markup for you.

不要让自己用正则表达式解析 HTML！相反，让 HTML 解析器库为您处理标记的结构。

I suggest you to check out Simple HTML DOM (http://simplehtmldom.sourceforge.net/). It is a library specifically written to aid in solving this kind of web scraping problems in PHP. By using such a library, you can write your scraping in much less lines of codes without worrying about creating working regexps.

我建议您查看 Simple HTML DOM ( http://simplehtmldom.sourceforge.net/)。它是一个专门编写的库，用于帮助解决 PHP 中的此类 Web 抓取问题。通过使用这样的库，您可以用更少的代码行编写抓取，而不必担心创建工作正则表达式。

In principle, with Simple HTML DOM you just write something like:

原则上，使用简单的 HTML DOM，您只需编写如下内容：

$html = file_get_html('http://flow935.com/playlist/flowhis.HTM');
foreach($html->find('tr') as $row) {
   // Parse table row here
}

This can be then extended to capture your data in some format, for instance to create an array of artists and corresponding titles as:

然后可以扩展以某种格式捕获您的数据，例如创建一系列艺术家和相应的标题：

<?php
require('simple_html_dom.php');

$table = array();

$html = file_get_html('http://flow935.com/playlist/flowhis.HTM');
foreach($html->find('tr') as $row) {
    $time = $row->find('td',0)->plaintext;
    $artist = $row->find('td',1)->plaintext;
    $title = $row->find('td',2)->plaintext;

    $table[$artist][$title] = true;
}

echo '<pre>';
print_r($table);
echo '</pre>';

?>

We can see that this code can be (trivially) changed to reformat the data in any other way as well.

我们可以看到，此代码也可以（简单地）更改为以任何其他方式重新格式化数据。

回答by John Ballinger

I tried simple_html_dom but on larger files and on repeat calls to the function I am getting zend_mm_heap_corrupted on php 5.3 (GAH). I have also tried preg_match_all (but this has been failing on a larger file (5000) lines of html, which was only about 400 rows of my HTML table.

我尝试过 simple_html_dom 但在较大的文件和重复调用函数时，我在 php 5.3 (GAH) 上遇到了 zend_mm_heap_corrupted。我也尝试过 preg_match_all （但是这在较大的 html 文件（5000）行上失败了，它只有我的 HTML 表的大约 400 行。

I am using this and its working fast and not spitting errors.

我正在使用它，它的工作速度很快，而且不会出现错误。

$dom = new DOMDocument();  

//load the html  
$html = $dom->loadHTMLFile("htmltable.html");  

  //discard white space   
$dom->preserveWhiteSpace = false;   

  //the table by its tag name  
$tables = $dom->getElementsByTagName('table');   


    //get all rows from the table  
$rows = $tables->item(0)->getElementsByTagName('tr');   
  // get each column by tag name  
$cols = $rows->item(0)->getElementsByTagName('th');   
$row_headers = NULL;
foreach ($cols as $node) {
    //print $node->nodeValue."\n";   
    $row_headers[] = $node->nodeValue;
}   

$table = array();
  //get all rows from the table  
$rows = $tables->item(0)->getElementsByTagName('tr');   
foreach ($rows as $row)   
{   
   // get each column by tag name  
    $cols = $row->getElementsByTagName('td');   
    $row = array();
    $i=0;
    foreach ($cols as $node) {
        # code...
        //print $node->nodeValue."\n";   
        if($row_headers==NULL)
            $row[] = $node->nodeValue;
        else
            $row[$row_headers[$i]] = $node->nodeValue;
        $i++;
    }   
    $table[] = $row;
}   

var_dump($table);

This code worked well for me. Example of original code is here.

这段代码对我来说效果很好。原始代码示例在这里。

http://techgossipz.blogspot.co.nz/2010/02/how-to-parse-html-using-dom-with-php.html

http://techgossipz.blogspot.co.nz/2010/02/how-to-parse-html-using-dom-with-php.html