簡介：這是小試QueryPath，一個實現了不少jQuery介面的PHP類庫的詳細頁面，介紹了和php,有關的知識、技巧、經驗，和一些php源碼等。
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很想寫一個PHP的jQuery，但是自己精力與能力有限，於是Google一下，找到 QueryPath。
其實前幾天已經找到一個，叫 simple_html_dom (SourceForge下載)，不到1000行代碼，很簡單。有興趣就下載看看。
基本使用方法：
require 'src/QueryPath/QueryPath.php';// 或者負載檔案
qp('http://www.google.com.hk/index.html');
如果 qp的第一個參數是 url（包括http、file），則需要以html或htm為尾碼名，否則當作XML來解釋，通常會解釋失敗，並拋出 QueryPathExtension 異常，這應該說是一個缺陷，2.1版本的代碼在QueryPath.php的3903-4010行。
有了qp返回的對象，我們就可以用 PHP 以 jQuery 類似的方法來操作DOM，如選擇節點，可以用CSS3選取器、parent/top/children等函數。
下載是官方手冊上的一個快速入門的例子 ：
<?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();
?>
詳細請參考其官網及API手冊（包含在源碼中）：http://querypath.org/
QueryPath的基本特徵：http://querypath.org/node/2
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http://biancheng.dnbcw.info/php/338996.html pageNo:8
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