电脑故障

基于simple

发布日期：2018/5/22

本篇文章对simple html dom的使用进行了详细的分析介绍需要的朋友参考下复制代码代码如下:
<P>简单范例
<?phpinclude "simple_html_domphp" ; //加载simple_html_domphp文件
$html = file_get_html(); //获取html$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 $element>src <br>; //获取每个img标签中的src}// Find all links foreach($dom>find(a) as $element){ //获取a标签的数组 echo $element>href <br>; //获取每个a标签中的href}</P><P>
$html = file_get_html(); //获取html$dom = new simple_html_dom(); //new simple_html_dom对象$dom>load($html); //加载html// Find all article blocksforeach($dom>find(divarticle) as $article) { $item[title] = $article>find(divtitle )>plaintext; //plaintext 获取纯文本 $item[intro] = $article>find(divintro )>plaintext; $item[details] = $article>find(divdetails )>plaintext; $articles[] = $item;}print_r($articles);</P><P>}</P><P>
// Create DOM from string</P><P>$html = str_get_html(<div id="hello">Hello</div><div id="world">World</div>);
$dom = new simple_html_dom(); //new simple_html_dom对象</P><P>$dom>load($html); //加载html
$dom>find(div )>class = bar; //class = 赋值给第二个div的class赋值</P><P>$dom>find(div[id=hello] )>innertext = foo; //innertext内部文本</P><P>echo $dom; </P><P>// Output: <div id="hello">foo</div><div id="world" class="bar">World</div></P><P> </P><P>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 </P>
<P> find 方法详细介绍</P><P>
find ( string $selector [ int $index] )
// Find all anchors returns a array of element objects a标签数组
$ret = $html>find(a);</P><P>// Find (N)th anchor returns element object or null if not found (zero based)第一个a标签
$ret = $html>find(a );</P><P>// Find lastest anchor returns element object or null if not found (zero based)最后一个a标签
$ret = $html>find(a ); </P><P>// Find all <div> with the id attribute
$ret = $html>find(div[id]);</P><P>// Find all <div> which attribute id=foo
$ret = $html>find(div[id=foo]); </P><P>
// Find all element which id=foo
$ret = $html>find(#foo);</P><P>// Find all element which class=foo
$ret = $html>find(foo);</P><P>// Find all element has attribute id
$ret = $html>find(*[id]); </P><P>// Find all anchors and images a标签与img标签数组
$ret = $html>find(a img); </P><P>// Find all anchors and images with the "title" attribute
$ret = $html>find(a[title] img[title]);</P><P>
// Find all <li> in <ul>
$es = $html>find(ul li); ul标签下的li标签数组</P><P>// Find Nested <div> tags
$es = $html>find(div div div); div标签下div标签下div标签数组</P><P>// Find all <td> in <table> which class=hello
$es = $html>find(tablehello td); table标签下td标签数组</P><P>// Find all td tags with attribite align=center in table tags
$es = $html>find(table td[align=center]); </P><P> Element 的方法
$e = $html>find("div" ); //$e 所拥有的方法如下表所示
Attribute Name Usage
$e>tag 标签
$e>outertext 外文本
$e>innertext 内文本
$e>plaintext 纯文本 </P><P> </P><P>// Example
$html = str_get_html("<div>foo <b>bar</b></div>");
echo $e>tag; // Returns: " div"
echo $e>outertext; // Returns: " <div>foo <b>bar</b></div>"
echo $e>innertext; // Returns: " foo <b>bar</b>"
echo $e>plaintext; // Returns: " foo bar"</P><P>DOM traversing 方法
Method Description
mixed$e>children ( [int $index] ) 子元素
element$e>parent () 父元素
element$e>first_child () 第一个子元素
element$e>last_child () 最后一个子元素
element$e>next_sibling () 后一个兄弟元素
element$e>prev_sibling () 前一个兄弟元素 </P><P>
// Example
echo $html>find("#div" )>children()>children()>children()>id;
// or
echo $html>getElementById("div")>childNodes()>childNodes()>childNodes()>getAttribute(id);
</P>

上一篇：关于url地址传参数时字符串有回车造成页面脚本赋值失败的解决方法

下一篇：深入file