simplehtmldom Doc api帮助文档
API Reference
Helper functions
object str_get_html ( string $content ) Creates a DOM object from a string.
object file_get_html ( string $filename ) Creates a DOM object from a file or a URL.
DOM methods & properties
stringplaintext Returns the contents extracted from HTML.
voidclear () Clean up memory.
voidload ( string $content ) Load contents from a string.
stringsave ( [string $filename] ) Dumps the internal DOM tree back into a string. If the $filename is set, result string will save to file.
voidload_file ( string $filename ) Load contents from a from a file or a URL.
voidset_callback ( string $function_name ) Set a callback function.
mixedfind ( string $selector [, int $index] ) Find elements by the CSS selector. Returns the Nth element object if index is set, otherwise return an array of object.
Element methods & properties
string[attribute] Read or write element's attribure value.
stringtag Read or write the tag name of element.
stringoutertext Read or write the outer HTML text of element.
stringinnertext Read or write the inner HTML text of element.
stringplaintext Read or write the plain text of element.
mixedfind ( string $selector [, int $index] ) Find children by the CSS selector. Returns the Nth element object if index is set, otherwise, return an array of object.
DOM traversing
mixed$e->children ( [int $index] ) Returns the Nth child object if index is set, otherwise return an array of children.
element$e->parent () Returns the parent of element.
element$e->first_child () Returns the first child of element, or null if not found.
element$e->last_child () Returns the last child of element, or null if not found.
element$e->next_sibling () Returns the next sibling of element, or null if not found.
element$e->prev_sibling () Returns the previous sibling of element, or null if not found.
Camel naming convertions You can also call methods with W3C STANDARD camel naming convertions.
string$e->getAttribute ( $name ) string$e->attribute
void$e->setAttribute ( $name, $value ) void$value = $e->attribute
bool$e->hasAttribute ( $name ) boolisset($e->attribute)
void$e->removeAttribute ( $name ) void$e->attribute = null
element$e->getElementById ( $id ) mixed$e->find ( "#$id", 0 )
mixed$e->getElementsById ( $id [,$index] ) mixed$e->find ( "#$id" [, int $index] )
element$e->getElementByTagName ($name ) mixed$e->find ( $name, 0 )
mixed$e->getElementsByTagName ( $name [, $index] ) mixed$e->find ( $name [, int $index] )
element$e->parentNode () element$e->parent ()
mixed$e->childNodes ( [$index] ) mixed$e->children ( [int $index] )
element$e->firstChild () element$e->first_child ()
element$e->lastChild () element$e->last_child ()
element$e->nextSibling () element$e->next_sibling ()
element$e->previousSibling () element$e->prev_sibling ()
// Create a DOM object from a string
$html = str_get_html('<html><body>Hello!</body></html>');
// Create a DOM object from a URL
$html = file_get_html('http://www.google.com/');
// Create a DOM object from a HTML file
$html = file_get_html('test.htm');
// Create a DOM object
$html = new simple_html_dom();
// Load HTML from a string
$html->load('<html><body>Hello!</body></html>');
// Load HTML from a URL
$html->load_file('http://www.google.com/');
// Load HTML from a HTML file
$html->load_file('test.htm');
// Find all anchors, returns a array of element objects
$ret = $html->find('a');
// Find (N)thanchor, returns element object or null if not found(zero based)
$ret = $html->find('a', 0);
// Find all <div> which attribute id=foo
$ret = $html->find('div[id=foo]');
// Find all <div> with the id attribute
$ret = $html->find('div[id]');
// Find all element has attribute id
$ret = $html->find('[id]');
// Find all element which id=foo
$ret = $html->find('#foo');
// Find all element which class=foo
$ret = $html->find('.foo');
// Find all anchors and images
$ret = $html->find('a, img');
// Find all anchors and images with the "title" attribute
$ret = $html->find('a[title], img[title]');
// Find all <li> in <ul>
$es = $html->find('ul li');
// Find Nested <div> tags
$es = $html->find('div div div');
// Find all <td> in <table> which class=hello
$es = $html->find('table.hello td');
// Find all td tags with attribite align=center in table tags
$es = $html->find(''table td[align=center]');
// Find all <li> in <ul>
foreach($html->find('ul') as $ul)
{
foreach($ul->find('li') as $li)
{
// do something...
}
}
// Find first <li> in first <ul>
$e = $html->find('ul', 0)->find('li', 0);
Supports these operators in attribute selectors:
[attribute] Matches elements that have the specified attribute.
[attribute=value] Matches elements that have the specified attribute with a certain value.
[attribute!=value] Matches elements that don't have the specified attribute with a certain value.
[attribute^=value] Matches elements that have the specified attribute and it starts with a certain value.
[attribute$=value] Matches elements that have the specified attribute and it ends with a certain value.
[attribute*=value] Matches elements that have the specified attribute and it contains a certain value.
// Find all text blocks
$es = $html->find('text');
// Find all comment (<!--...-->) blocks
$es = $html->find('comment');
// Get a attribute ( If the attribute is non-value attribute (eg. checked, selected...), it will returns true or false)
$value = $e->href;
// Set a attribute(If the attribute is non-value attribute (eg. checked, selected...), set it's value as true or false)
$e->href = 'my link';
// Remove a attribute, set it's value as null!
$e->href = null;
// Determine whether a attribute exist?
if(isset($e->href))
echo 'href exist!';
// Example
$html = str_get_html("<div>foo <b>bar</b></div>");
$e = $html->find("div", 0);
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"
$e->tag Read or write the tag name of element.
$e->outertext Read or write the outer HTML text of element.
$e->innertext Read or write the inner HTML text of element.
$e->plaintext Read or write the plain text of element.
// Extract contents from HTML
echo $html->plaintext;
// Wrap a element
$e->outertext = '<div class="wrap">' . $e->outertext . '<div>';
// Remove a element, set it's outertext as an empty string
$e->outertext = '';
// Append a element
$e->outertext = $e->outertext . '<div>foo<div>';
// Insert a element
$e->outertext = '<div>foo<div>' . $e->outertext;
// If you are not so familiar with HTML DOM, check this link to learn more...
// Example
echo $html->find("#div1", 0)->children(1)->children(1)->children(2)->id;
// or
echo $html->getElementById("div1")->childNodes(1)->childNodes(1)->childNodes(2)->getAttribute('id');
You can also call methods with Camel naming convertions.
mixed$e->children ( [int $index] ) Returns the Nth child object if index is set, otherwise return an array of children.
element$e->parent () Returns the parent of element.
element$e->first_child () Returns the first child of element, or null if not found.
element$e->last_child () Returns the last child of element, or null if not found.
element$e->next_sibling () Returns the next sibling of element, or null if not found.
element$e->prev_sibling () Returns the previous sibling of element, or null if not found.
// Dumps the internal DOM tree back into string
$str = $html;
// Print it!
echo $html;
// Dumps the internal DOM tree back into string
$str = $html->save();
// Dumps the internal DOM tree back into a file
$html->save('result.htm');
// Write a function with parameter "$element"
function my_callback($element) {
// Hide all <b> tags
if ($element->tag=='b')
$element->outertext = '';
}
// Register the callback function with it's function name
$html->set_callback('my_callback');
// Callback function will be invoked while dumping
echo $html;
相关推荐
-
javascript firefox兼容ie的dom方法脚本
if(!document.all){ //zzcv的ff ie兼容脚本 /*脚本没有解决的问题及处理: 2.IE下,可以使用()或[]获取集合类对象;Firefox下,只能使用[]获取集合类对象. 解决方法:统一使用[]获取集合类对象. 3.IE下,可以使用获取常规属性的方法来获取自定义属性,也可以使用getAttribute()获取自定义属性;Firefox下,只能使用getAttribute()获取自定义属性. 解决方法:统一通过getAttribute()获取自定义属性. 4.IE
-
javascript获取dom的下一个节点方法
利用javascript 写一个在页面点击加减按钮实现数字的累加. 简略的html大概如此.看得懂就好不要在意这些细节啊 <input type="button" value="+" onclick="jia(this)" /> <label class="num">0</label> <input type="button" value="-"
-
Javascript入门学习第八篇 js dom节点属性说明第1/2页
今天我们讲DOM属性. 前面其实我们已经碰过DOM属性了. 比如: nodeName,nodeType-..今天我们详细的讲解下. 1,nodeName属性 : 节点的名字. 如果节点是元素节点,那么返回这个元素的名字.此时,相当于tagName属性. 比如: <p>aaaa</p> : 则返回 p ; 如果是属性节点,nodeName将返回这个属性的名字. 如果是文本节点,nodeName将返回一个#text的字符串. 另外我要说的是: nodeName属性是一个只读属性,不
-
JavaScript与DOM组合动态创建表格实例
这篇文章简单介绍了DOM 1.0一些基本而强大的方法以及如何在JavaScript中使用它们.你可以学到如何动态地创建.获取.控制和删除HTML元素.这些DOM方法同样适用于XML.所有全面支持DOM 1.0的浏览器都能很好地运行本篇的实例,比如IE5,Firefox等. 这篇文章通过实例代码介绍DOM.请从尝试下面的HTML例子开始.它使用DOM 1的方法由JavaScript动态创建一个HTML表格.它创建一个由四个包含文本内容的单元格组成的小表格.单元格的文字内容是:"单元格是第y行第x列
-
JavaScript判断DOM何时加载完毕的技巧
处理HTML DOM文档存在一个难题是,JavaScript可以在DOM完全加载之前执行,这会给你的代码引发不少的潜在问题.浏览器的渲染和操作顺序大致如下列表: HTML解析完毕 外部脚本和样式表加载完毕 脚本在文档内解析并执行 HTML DOM完全构造起来 图片和外部内容加载 网页完成加载 在网页头部并且从外部文件加载的脚本会在HTML真正构造之前执行.如前所述,这是个至关重要的问题,因为这两处执行的脚本并不能访问还不存在的DOM.幸好,我们还有若干的补救方法. 目前,最常用的级数是完全等待整
-
用JavaScript获取DOM元素位置和尺寸大小的方法
在一些复杂的页面中经常会用JavaScript处理一些DOM元素的动态效果,这种时候我们经常会用到一些元素位置和尺寸的计算,浏览器兼容性问题也是不可忽略的一部分,要想写出预想效果的JavaScript代码,我们需要了解一些基本知识. 基础概念 为了方便理解,我们需要了解几个基础概念,每个HTML元素都有下列属性 offsetWidth clientWidth scrollWidth offsetHeight clientHeight scrollHeight offsetLeft clientL
-
JavaScript 节点操作 以及DOMDocument属性和方法
属性: 1Attributes 存储节点的属性列表(只读) 2childNodes 存储节点的子节点列表(只读) 3dataType 返回此节点的数据类型 4Definition 以DTD或XML模式给出的节点的定义(只读) 5Doctype 指定文档类型节点(只读) 6documentElement 返回文档的根元素(可读写) 7firstChild 返回当前节点的第一个子节点(只读) 8Implementation 返回XMLDOMImplementation对象 9lastChild 返回
-
javascript转换字符串为dom对象（字符串动态创建dom）
前言: 在javascript里面动态创建标准dom对象一般使用: var obj = document.createElement('div'); 然后再给obj设置一些属性. 但是,在实际使用过程中,有些人可能会想,要是能这样创建标准的dom对象就好了 伪代码:var obj=strToDom('<div id="div_1" class="div1">Hello World!</div>'); 那么今天的目的就是教大家怎么去实现一个这样
-
javascript中HTMLDOM操作详解
一.定义:htmlDOM是一种面向对象的树的模型,它包含html中的所有元素:通过html可以找到所有包含在dom中的元素. 二.作用: 1.查找html元素 1)通过id查找元素(document.getElementById();) <div id="d" ></div> var x=document.getElementById("d"); 2)通过标签名查找元素 <div id="m"></div
-
javascript学习笔记（三）BOM和DOM详解
js组成 我们都知道, javascript 有三部分构成,ECMAScript,DOM和BOM,根据宿主(浏览器)的不同,具体的表现形式也不尽相同,ie和其他的浏览器风格迥异. 1. DOM 是 W3C 的标准: [所有浏览器公共遵守的标准] 2. BOM 是 各个浏览器厂商根据 DOM 在各自浏览器上的实现;[表现为不同浏览器定义有差别,实现方式不同] 3. window 是 BOM 对象,而非 js 对象: DOM(文档对象模型)是 HTML 和 XML 的应用程序接口(API). BOM