How do I extract attributes from HTML elements using DiDOM?

DiDOM is a simple and fast HTML and XML parser written in PHP. With DiDOM, you can easily parse HTML documents and extract elements, attributes, and text content. If you're looking to extract attributes from HTML elements using DiDOM, you'll need to follow these steps:

1. Install DiDOM: If you haven't already installed DiDOM, you can do so using Composer. Run the following command in your terminal:

   composer require imangazaliev/didom

1. Include DiDOM in your PHP script: Use Composer's autoload feature to include DiDOM in your script:

   require_once 'vendor/autoload.php';

1. Load the HTML content: You can load HTML content from a string or from a file using DiDOM's Document class:

   // From a string
   $htmlString = '<div id="example" class="container">Hello, World!</div>';
   $document = new \DiDom\Document($htmlString);

   // From a file or URL
   $document = new \DiDom\Document('path_to_file_or_url', true);

1. Find the element(s) you want to extract attributes from: Use the find method to locate the HTML element:

   // Find a single element by its tag name
   $element = $document->first('div');

   // Find a single element by its class name
   $element = $document->first('.container');

   // Find a single element by its ID
   $element = $document->first('#example');

1. Extract the attributes: Once you have the element, you can extract its attributes using the getAttribute method:

   // Get the 'class' attribute
   $classAttribute = $element->getAttribute('class');

   // Get the 'id' attribute
   $idAttribute = $element->getAttribute('id');

Here's a complete example that loads an HTML string, finds an element, and extracts its attributes:

<?php

require_once 'vendor/autoload.php';

use DiDom\Document;

$htmlString = '<div id="example" class="container">Hello, World!</div>';
$document = new Document($htmlString);

// Find the div element with the ID 'example'
$element = $document->first('#example');

// Extract attributes
$idAttribute = $element->getAttribute('id');
$classAttribute = $element->getAttribute('class');

echo "The ID attribute is: $idAttribute\n";
echo "The class attribute is: $classAttribute\n";

This script will output:

The ID attribute is: example
The class attribute is: container

Remember, if you want to extract multiple attributes, you can call getAttribute multiple times for different attribute names. If you need to get all attributes of an element as an associative array, you can use the attributes method:

$attributes = $element->attributes();

foreach ($attributes as $name => $value) {
    echo "The attribute $name has the value $value\n";
}

DiDOM makes it straightforward to parse and manipulate HTML documents in PHP, and extracting attributes is just one of the many things you can do with this library.