基于simple_html_dom的使用小结_php技巧

简单范例
$html = file_get_html('http://www.google.com/'); //获取html$dom = new simple_html_dom(); //new simple_html_dom对象$dom->load($html) //加载html// Find all images foreach($dom->find('img') as $element) { //获取img标签数组 echo $element->src . '
'; //获取每个img标签中的src}// Find all links foreach($dom->find('a') as $element){ //获取a标签的数组 echo $element->href . '
'; //获取每个a标签中的href}

$html = file_get_html('http://slashdot.org/'); //获取html$dom = new simple_html_dom(); //new simple_html_dom对象$dom->load($html); //加载html// Find all article blocksforeach($dom->find('div.article') as $article) { $item['title'] = $article->find('div.title', 0)->plaintext; //plaintext 获取纯文本 $item['intro'] = $article->find('div.intro', 0)->plaintext; $item['details'] = $article->find('div.details', 0)->plaintext; $articles[] = $item;}print_r($articles);

}

// Create DOM from string

$html = str_get_html('HelloWorld');
$dom = new simple_html_dom(); //new simple_html_dom对象

$dom->load($html); //加载html
$dom->find('div', 1)->class = 'bar'; //class = 赋值 给第二个div的class赋值

$dom->find('div[id=hello]', 0)->innertext = 'foo'; //innertext内部文本

echo $dom;

// Output: fooWorld

DOM methods & properties
Name Description
void __construct ( [string $filename] ) 构造函数,将文件名参数将自动加载内容,无论是文本或文件/ url。
string plaintext 纯文本
void clear () 清理内存
void load ( string $content ) 加载内容
string save ( [string $filename] ) Dumps the internal DOM tree back into a string. If the $filename is set, result string will save to file.
void load_file ( string $filename ) Load contents from a from a file or a URL.
void set_callback ( string $function_name ) 设置一个回调函数。
mixed find ( string $selector [, int $index] ) 找到元素的CSS选择器。返回第n个元素对象如果索引设置,否则返回一个数组对象。

4.find 方法详细介绍

find ( string $selector [, int $index] )
// Find all anchors, returns a array of element objects a标签数组
$ret = $html->find('a');

// Find (N)th anchor, returns element object or null if not found (zero based)第一个a标签
$ret = $html->find('a', 0);

// Find lastest anchor, returns element object or null if not found (zero based)最后一个a标签
$ret = $html->find('a', -1);

// Find all with the id attribute
$ret = $html->find('div[id]');

// Find all which attribute id=foo
$ret = $html->find('div[id=foo]');

// Find all element which id=foo
$ret = $html->find('#foo');

// Find all element which class=foo
$ret = $html->find('.foo');

// Find all element has attribute id
$ret = $html->find('*[id]');

// Find all anchors and images a标签与img标签数组
$ret = $html->find('a, img');

// Find all anchors and images with the "title" attribute
$ret = $html->find('a[title], img[title]');

// Find all