Use GravityPDF's QueryPath

QueryPath is now updated and maintained by the amazing folks at GravityPDF. https://github.com/GravityPDF/querypath. The version of QueryPath in this repository is no longer maintained. You are encouraged to use GravityPDF's version. -- Matt, Dec. 2022

QueryPath: Find your way.

Authors: Matt Butcher (lead), Emily Brand, and many others

This package is licensed under an MIT license (COPYING-MIT.txt).

At A Glance

QueryPath is a jQuery-like library for working with XML and HTML documents in PHP. It now contains support for HTML5 via the HTML5-PHP project.

Gettings Started

Assuming you have successfully installed QueryPath via Composer, you can parse documents like this:

require_once "vendor/autoload.php";

// HTML5 (new)
$qp = html5qp("path/to/file.html");

// Legacy HTML via libxml
$qp = htmlqp("path/to/file.html");

// XML or XHTML
$qp = qp("path/to/file.html");

// All of the above can take string markup instead of a file name:
$qp = qp("<?xml version='1.0'?><hello><world/></hello>")

But the real power comes from chaining. Check out the example below.

Example Usage

Say we have a document like this:

<?xml version="1.0"?>
<table>
  <tr id="row1">
    <td>one</td><td>two</td><td>three</td>
  </tr>
  <tr id="row2">
    <td>four</td><td>five</td><td>six</td>
  </tr>
</table>

And say that the above is stored in the variable $xml. Now we can use QueryPath like this:

<?php
// Add the attribute "foo=bar" to every "td" element.
qp($xml, 'td')->attr('foo', 'bar');

// Print the contents of the third TD in the second row:
print qp($xml, '#row2>td:nth(3)')->text();

// Append another row to the XML and then write the
// result to standard output:
qp($xml, 'tr:last')->after('<tr><td/><td/><td/></tr>')->writeXML();

?>

(This example is in examples/at-a-glance.php.)

With over 60 functions and robust support for chaining, you can accomplish sophisticated XML and HTML processing using QueryPath.

QueryPath Installers

The preferred method of installing QueryPath is via Composer.

You can also download the package from GitHub.

Composer (Preferred)

To add QueryPath as a library in your project, add this to the 'require' section of your composer.json:

{
  "require": {
    "querypath/QueryPath": ">=3.0.0"
  }
}

The run php composer.phar install in that directory.

To stay up to date on stable code, you can use dev-master instead of >=3.0.0.

Manual Install

You can either download a stable release from the GitHub Tags page or you can use git to clone this repository and work from the code.

Including QueryPath

As of QueryPath 3.x, QueryPath uses the Composer autoloader if you installed with composer:

<?php
require 'vendor/autoload.php';
?>

Without Composer, you can include QueryPath like this:

<?php
require 'QueryPath/src/qp.php';
?>

QueryPath can also be compiled into a Phar and then included like this:

<?php
require 'QueryPath.phar';
?>

From there, the main functions you will want to use are qp() (alias of QueryPath::with()) and htmlqp() (alias of QueryPath::withHTML()). Start with the API docs.

technosophos/querypath