QueryPath，实现很多jQuery函数的PHP类库-php开发知识文章-编程文章分享

基本使用方法

require 'src/QueryPath/QueryPath.php';

// 解释HTML为DOM

qp('<html>...</html>');

// 或者加载文件

qp('http://www.google.com.hk/index.html');

如果 qp的第一个参数是 url（包括http、file），则需要以html或htm为后缀名，否则当作XML来解释，通常会解释失败，并抛出 QueryPathExtension 异常，这应该说是一个缺陷，2.1版本的代码在QueryPath.php的3903-4010行。

有了qp返回的对象，我们就可以用 PHP 以 jQuery 类似的方法来操作DOM，如选择节点，可以用CSS3选择器、parent/top/children等函数

官方快速入门的例子

<?php

require_once '../src/QueryPath/QueryPath.php';

// Begin with an HTML stub document (XHTML, actually), and navigate to the title.

qp(QueryPath::HTML_STUB, 'title')

// Add some text to the title

->text('Example of QueryPath.')

// Now look for the <body> element

->find(':root body')

// Inside the body, add a title and paragraph.

->append('<h1>This is a test page</h1><p>Test text</p>')

// Now we select the paragraph we just created inside the body

->children('p')

// Add a 'class="some-class"' attribute to the paragraph

->attr('class', 'some-class')

// And add a style attribute, too, setting the background color.

->css('background-color', '#eee')

// Now go back to the paragraph again

->parent()

// Before the paragraph and the title, add an empty table.

->prepend('<table id="my-table"></table>')

// Now let's go to the table...

->find('#my-table')

// Add a couple of empty rows

->append('<tr></tr><tr></tr>')

// select the rows (both at once)

->children()

// Add a CSS class to both rows

->addClass('table-row')

// Now just get the first row (at position 0)

->eq(0)

// Add a table header in the first row

->append('<th>This is the header</th>')

// Now go to the next row

->next()

// Add some data to this row

->append('<td>This is the data</td>')

// Write it all out as HTML

->writeHTML();

QueryPath，实现很多jQuery函数的PHP类库

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