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QueryPath: Find the better way

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.

Why this lib was forked and recoded

• Legacy code (repo was left for > 3 years) didn't allow to support new features of PHP>=7.1
• A lot of DeaDBeaF code like: unused params, unused local variables etc
• A lot of needless flow structures
• DRY/KISS/SOLID rules were thrown away when it was developed
• Minor bugs and fragile functionality

Installation

composer require arthurkushman/query-path 

Gettings Started

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

// 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:
echo 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.

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

QueryPath Format Extension

format()

\QueryPath\DOMQuery format(callable $callback [, mixed $args [, $... ]])

A quick example:

<?php
QueryPath::enable(Format::class);
$qp = qp('<?xml version="1.0"?><root><div>_apple_</div><div>_orange_</div></root>');

$qp->find('div')
        ->format('strtoupper')
        ->format('trim', '_')
        ->format(function ($text) {
            return '*' . $text . '*';
        });

$qp->writeXML();

OUTPUT:

<?xml version="1.0"?>
<root>
  <div>*APPLE*</div>
  <div>*ORANGE*</div>
</root>

formatAttr()

\QueryPath\DOMQuery formatAttr(string $name, callable $callback [, mixed $args [, $... ]])

A quick example:

<?php
QueryPath::enable(Format::class);
$qp = qp('<?xml version="1.0"?><root>' .
        '<item label="_apple_" total="12,345,678" />' .
        '<item label="_orange_" total="987,654,321" />' .
        '</root>');

$qp->find('item')
        ->formatAttr('label', 'trim', '_')
        ->formatAttr('total', 'str_replace[2]', ',', '');

$qp->find('item')->formatAttr('label', function ($value) {
    return ucfirst(strtolower($value));
});

$qp->writeXML();

OUTPUT:

<?xml version="1.0"?>
<root>
  <item label="Apple" total="12345678"/>
  <item label="Orange" total="987654321"/>
</root>