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('Hello!');

// 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('Hello!');

// 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

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

// Find all

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

in

$es = $html->find('ul li');

// Find Nested
tags
$es = $html->find('div div div');

// Find all in 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
in

foreach($html->find('ul') as $ul)
{
foreach($ul->find('li') as $li)
{
// do something...
}
}

// Find first
• in first
  
  $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("
  foo bar
  ");
  $e = $html->find("div", 0);
  
  echo $e->tag; // Returns: " div"
  echo $e->outertext; // Returns: "
  foo bar
  "
  echo $e->innertext; // Returns: " foo bar"
  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 = '
  ' . $e->outertext . '
  ';
  
  // Remove a element, set it's outertext as an empty string
  $e->outertext = '';
  
  // Append a element
  $e->outertext = $e->outertext . '
  foo
  ';
  
  // Insert a element
  $e->outertext = '
  foo
  ' . $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 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;
  声明：本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系[e-mail]核实处理。
  相关文章
  相关视频
  ---
  • php 浮点数四舍五入函数
  • 最好最实用的PHP二次开发教程
  • 如何文档化你的PHP类(一)
  • 使用 curl_multi_init 执行并发请求
  • simplehtmldom Doc api帮助文档
  • DOM Document
  • DOM DocumentImplementation
  • DOM DocumentType
  • Docker 教程
  • Docker 架构
  网友评论
  文明上网理性发言，请遵守 新闻评论服务协议
  我要评论
  
  立即提交
  专题推荐
  • 独孤九贱-php全栈开发教程

    全栈 170W+

    主讲：Peter-Zhu 轻松幽默、简短易学，非常适合PHP学习入门

  • 玉女心经-web前端开发教程

    入门 80W+

    主讲：灭绝师太 由浅入深、明快简洁，非常适合前端学习入门

  • 天龙八部-实战开发教程

    实战 120W+

    主讲：西门大官人 思路清晰、严谨规范，适合有一定web编程基础学习
  作者信息
  
  认证0级讲师
  发布技术文章
  • 最新文章
  • 热门排行
  

  • 在python的开发过程中如何进行单链表的实现（代码）
  • 如何理解Elasticsearch单机双节点集群部署
  • 如何理解关于memset函数
  • 启动页进入时有短暂黑屏或白屏现象的终极解决方案
  • 如何把WebStorm上传代码到Git
  • 分布式系统唯一ID生成方案汇总
  • 如何在远程过程调用（RPC）
  • Visual Studio Code中安装go语言插件
  

  • php实现图片批量下载到本地实例
  • php实现图片批量下载到本地实例(可采防盗链)
  • Linux 下 php 转DOC转PDF转SWF实现百度的文库预览功能
  • 简单的php文件上传（实例）
  • php判断是否为数字
  • phpredis中文手册—《redis中文手册》 php版
  • PHP聊天室技术讲解
  • PHP下使用富文本过滤器 HTML Purifier 防止xss跨站攻击
  推荐视频教程
  javascript初级视频教程
  jquery 基础视频教程
  视频教程分类
  • php视频教程
  • html视频教程
  • css视频教程
  • JS视频教程
  • jQuery视频教程
  • mysql视频教程
  • Linux视频教程
  • Python视频教程
  • 网站首页
  • PHP视频
  • PHP实战
  • PHP代码
  • PHP手册
  • 词条
  • 手记
  • 编程词典
  • php培训
  ：公益在线php培训，帮助PHP学习者快速成长！
  Copyright 2014-2021 https://www.php.cn/ All Rights Reserved | 苏ICP备2020058653号-1关于我们免责申明赞助与捐赠广告合作