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使用php simple html dom parser解析html標(biāo)簽

用了一下

PHP Simple HTML DOM Parser?

解析HTML頁(yè)面，感覺(jué)還不錯(cuò)，它能創(chuàng)建一個(gè)DOM tree方便你解析html里面的內(nèi)容。用來(lái)抓東西挺好的。

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附帶一個(gè)例子，你也到sourceforge下載壓縮包看里面的例子：

Scraping data with PHP Simple HTML DOM Parser?

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PHP Simple HTML DOM Parser , written in PHP5+, allows you to manipulate HTML in a very easy way. Supporting invalid HTML, this parser is better then other PHP scripts using complicated regexes to extract information from web pages.

Before getting the necessary info, a DOM should be created from either URL or file. The following script extracts links & images from a website:

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Php代碼 // Create DOM from URL or file ? ?

$html = file_get_html('http://www.microsoft.com/'); ? ?

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// Extract links ? ?

foreach($html->find('a') as $element) ? ?

? ? ? ?echo $element->href . '
'; ? ??

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// Extract images ? ?

foreach($html->find('img') as $element) ? ?

? ? ? ?echo $element->src . '
'; ?

[php]?

// Create DOM from URL or file ??

$html = file_get_html('http://www.microsoft.com/'); ?

// Extract links ??

foreach($html->find('a') as $element) ?

? ? ? ?echo $element->href . '
'; ??

// Extract images ??

foreach($html->find('img') as $element) ?

? ? ? ?echo $element->src . '
'; ?

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// Create DOM from URL or file

$html = file_get_html('http://www.microsoft.com/');

// Extract links

foreach($html->find('a') as $element)

? ? ? ?echo $element->href . '
';?

// Extract images

foreach($html->find('img') as $element)

? ? ? ?echo $element->src . '
';

The parser can also be used to modify HTML elements:

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Php代碼 // Create DOM from string ? ?

$html = str_get_html('

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$html->find('div', 1)->class = 'bar'; ? ?

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$html->find('div[id=simple]', 0)->innertext = 'Foo'; ? ?

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// Output:

echo $html; ?

[php]?

// Create DOM from string ??

$html = str_get_html('

$html->find('div', 1)->class = 'bar'; ?

$html->find('div[id=simple]', 0)->innertext = 'Foo'; ?

// Output:

echo $html; ?

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// Create DOM from string

$html = str_get_html('

$html->find('div', 1)->class = 'bar';

$html->find('div[id=simple]', 0)->innertext = 'Foo';

// Output:

echo $html;

Do you wish to retrieve content without any tags?

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Php代碼 echo file_get_html('http://www.yahoo.com/')->plaintext; ?

[php]?

echo file_get_html('http://www.yahoo.com/')->plaintext; ?

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echo file_get_html('http://www.yahoo.com/')->plaintext;In the package files of this parser ([url]http://simplehtmldom.sourceforge.net/[/url]) you can find some scraping examples from digg, imdb, slashdot. Let’s create one that extracts the first 10 results (titles only) for the keyword “php” from Google:

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Php代碼 $url = 'http://www.google.com/search?hl=en&q=php&btnG=Search'; ? ?

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// Create DOM from URL ? ?

$html = file_get_html($url); ? ?

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// Match all 'A' tags that have the class attribute equal with 'l' ? ?

foreach($html->find('a[class=l]') as $key => $info) ? ?

{ ? ?

echo ($key + 1).'. '.$info->plaintext."
\n"; ? ?

} ?

[php]?

$url = 'http://www.google.com/search?hl=en&q=php&btnG=Search'; ?

// Create DOM from URL ??

$html = file_get_html($url); ?

// Match all 'A' tags that have the class attribute equal with 'l' ??

foreach($html->find('a[class=l]') as $key => $info) ?

{ ?

echo ($key + 1).'. '.$info->plaintext."
\n"; ?

} ?

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$url = 'http://www.google.com/search?hl=en&q=php&btnG=Search';

// Create DOM from URL

$html = file_get_html($url);

// Match all 'A' tags that have the class attribute equal with 'l'

foreach($html->find('a[class=l]') as $key => $info)

{

echo ($key + 1).'. '.$info->plaintext."
\n";

}NOTE Make sure to include the parser before using any functions of it:

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Php代碼?

include 'simple_html_dom.php'; ?

[php]?

include 'simple_html_dom.php'; ?

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include 'simple_html_dom.php';For more information regarding the usage of this function consider checking the ‘PHP Simple HTML Dom Parser’ Manual. To download the package files use the following URL: [url]

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