hQuery.php 
==========

An extremely fast and efficient web scraper that can parse megabytes of invalid HTML in a blink of an eye.

You can use the familiar jQuery/CSS selector syntax to easily find the data you need.

In my unit tests, I demand it be at least 10 times faster than Symfony's DOMCrawler on a 3Mb HTML document.
In reality, according to my humble tests, it is two-three orders of magnitude faster than DOMCrawler in some cases, especially when
selecting thousands of elements, and on average uses x2 less RAM.

See tests/README.md.

API Documentation

💡 Features

- Very fast parsing and lookup
- Parses broken HTML
- jQuery-like style of DOM traversal
- Low memory usage
- Can handle big HTML documents (I have tested up to 20Mb, but the limit is the amount of RAM you have)
- Doesn't require cURL to be installed and automatically handles redirects (see hQuery::fromUrl())
- Caches response for multiple processing tasks
- PSR-7 friendly (see hQuery::fromHTML($message))
- PHP 5.3+
- No dependencies

🛠 Install

Just add this folder to your project and include_once 'hquery.php'; and you are ready to hQuery.

Alternatively composer require duzun/hquery

or using npm install hquery.php, require_once 'node_modules/hquery.php/hquery.php';.

⚙ Usage

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``php
// Optionally use namespaces
use duzun\hQuery;

// Either use composer, or include this file:
include_once '/path/to/libs/hquery.php';

// Set the cache path - must be a writable folder
// If not set, hQuery::fromURL() would make a new request on each call
hQuery::$cache_path = "/path/to/cache";

// Time to keep request data in cache, seconds
// A value of 0 disables cache
hQuery::$cache_expires = 3600; // default one hour
`

I would recommend using php-http/cache-plugin
with a PSR-7 client for better flexibility.

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###### hQuery::fromFile( string $filename, boolean $use_include_path = false, resource $context = NULL )

`php
// Local
$doc = hQuery::fromFile('/path/to/filesystem/doc.html');

// Remote
$doc = hQuery::fromFile('https://example.com/', false, $context);
`

Where $context is created with stream_context_create().

For an example of using $context to make a HTTP request with proxy see #26.

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###### hQuery::fromHTML( string $html, string $url = NULL )

`php
$doc = hQuery::fromHTML('Contents...');

// Set base_url, in case the document is loaded from local source.
// Note: The base_url property is used to retrieve absolute URLs from relative ones.
$doc->base_url = 'http://desired-host.net/path';
`

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###### hQuery::fromUrl( string $url, array $headers = NULL, array|string $body = NULL, array $options = NULL )

`php
use duzun\hQuery;

// GET the document
$doc = hQuery::fromUrl('http://example.com/someDoc.html', ['Accept' => 'text/html,application/xhtml+xml;q=0.9,/;q=0.8']);

var_dump($doc->headers); // See response headers
var_dump(hQuery::$last_http_result); // See response details of last request

// with POST
$doc = hQuery::fromUrl(
'http://example.com/someDoc.html', // url
['Accept' => 'text/html,application/xhtml+xml;q=0.9,/;q=0.8'], // headers
['username' => 'Me', 'fullname' => 'Just Me'], // request body - could be a string as well
['method' => 'POST', 'timeout' => 7, 'redirect' => 7, 'decode' => 'gzip'] // options
);

`

For building advanced requests (POST, parameters etc) see hQuery::http_wr(),
though I recommend using a specialized (PSR-7?) library for making requests
and hQuery::fromHTML($html, $url=NULL) for processing results.
See Guzzle for eg.

#### PSR-7 example:

`sh
composer require php-http/message php-http/discovery php-http/curl-client
`

If you don't have cURL PHP extension,
just replace php-http/curl-client with php-http/socket-client in the above command.

`php
use duzun\hQuery;

use Http\Discovery\HttpClientDiscovery;
use Http\Discovery\MessageFactoryDiscovery;

$client = HttpClientDiscovery::find();
$messageFactory = MessageFactoryDiscovery::find();

$request = $messageFactory->createRequest(
'GET',
'http://example.com/someDoc.html',
['Accept' => 'text/html,application/xhtml+xml;q=0.9,/;q=0.8']
);

$response = $client->sendRequest($request);

$doc = hQuery::fromHTML($response, $request->getUri());

`

Another option is to use stream_context_create()
to create a $context, then call hQuery::fromFile($url, false, $context).

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###### hQuery::find( string $sel, array|string $attr = NULL, hQuery\Node $ctx = NULL )

`php
// Find all banners (images inside anchors)
$banners = $doc->find('a[href] > img[src]:parent');

// Extract links and images
$links = array();
$images = array();
$titles = array();

// If the result of find() is not empty
// $banners is a collection of elements (hQuery\Element)
if ( $banners ) {

// Iterate over the result
foreach($banners as $pos => $a) {
// $a->href property is the resolved $a->attr('href') relative to the
// documents , if present, or $doc->baseURL.
$links[$pos] = $a->href; // get absolute URL from href property
$titles[$pos] = trim($a->text()); // strip all HTML tags and leave just text

// Filter the result
if ( !$a->hasClass('logo') ) {
// $a->style property is the parsed $a->attr('style'), same as $a->attr('style', true)
if ( strtolower($a->style['position']) == 'fixed' ) continue;

$img = $a->find('img')[0]; // ArrayAccess
if ( $img ) $images[$pos] = $img->src; // short for $img->attr('src', true)
}
}

// If at least one element has the class .home
if ( $banners->hasClass('home') ) {
echo 'There is .home button!', PHP_EOL;

// ArrayAccess for elements and properties.
if ( $banners[0]['href'] == '/' ) {
echo 'And it is the first one!';
}
}
}

// Read charset of the original document (internally it is converted to UTF-8)
$charset = $doc->charset;

// Get the size of the document ( strlen($html) )
$size = $doc->size;

// The URL at which the document was requested
$requestUri = $doc->href;

// , if present, or the origin + dir path part from $doc->href.
// The .href and .src props are resolved using this value.
$baseURL = $doc->baseURL;
`

Note: In case the charset meta attribute has a wrong value or the internal conversion fails for any other reason, hQuery would ignore the error and continue processing with the original HTML, but would register an error message on $doc->html_errors['convert_encoding'].

🖧 Live Demo

On DUzun.Me

A lot of people ask for sources of my Live Demo page. Here we go:

view-source:https://duzun.me/playground/hquery

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You can easily run any of the examples/ on your local machine.
All you need is PHP installed in your system.
After you clone the repo with git clone https://github.com/duzun/hQuery.php.git,
you have several options to start a web-server.

###### Option 1:

`sh
cd hQuery.php/examples
php -S localhost:8000

open browser http://localhost:8000/


`

###### Option 2 (browser-sync):

This option starts a live-reload server and is good for playing with the code.

`sh
npm install
gulp

open browser http://localhost:8080/


`

###### Option 3 (VSCode):

If you are using VSCode, simply open the project and run debugger (F5).

🔧 TODO

- Unit tests everything
- Document everything
- ~~Cookie support~~ (implemented in mem for redirects)
- ~~Improve selectors to be able to select by attributes~~
- Add more selectors
- Use HTTPlug internally

💖 Support my projects

I love Open Source. Whenever possible I share cool things with the world (check out NPM and GitHub).

If you like what I'm doing and this project helps you reduce time to develop, please consider to:

- ★ Star and Share the projects you like (and use)
- ☕ Give me a cup of coffee - PayPal.me/duzuns (contact at duzun.me)
- ₿ Send me some Bitcoin at this addres: bitcoin:3MVaNQocuyRUzUNsTbmzQC8rPUQMC9qafa` (or using the QR below)
!bitcoin:3MVaNQocuyRUzUNsTbmzQC8rPUQMC9qafa