How to Add a Box Shadow to an Image in Dompdf?

To add a box shadow to an image in Dompdf, you cannot directly use CSS box-shadow property as Dompdf does not support it. Instead, you need to manipulate the image using external tools or libraries before generating the PDF. Here's a step-by-step guide to achieve this using PHP and the Intervention Image library:

Install Intervention Image library: If you haven't installed the Intervention Image library yet, you can install it using composer by running the following command in your terminal:
```
composer require intervention/image
```

Create a new PHP file and include the necessary libraries:

<?php

use Intervention\Image\ImageManagerStatic as Image;
use Dompdf\Dompdf;

require 'vendor/autoload.php';

Load the image and apply the box shadow using the Intervention Image library:
```
$image = Image::make('path/to/your/image.jpg');
$image->shadow(function ($shadow) {
    $shadow->offset(1, 1)
           ->color('gray', 0.5)
           ->blur(2);
});
$image->save('path/to/save/shadowed-image.jpg');
```
In the code above, we load the image using the Image::make() method and apply the box shadow using the shadow() method. You can customize the offset, color, and blur values to achieve the desired effect.

Generate the PDF using Dompdf:

$dompdf = new Dompdf();
$html = '<img src="path/to/save/shadowed-image.jpg" alt="Image with box shadow">';
$dompdf->loadHtml($html);
$dompdf->setPaper('A4', 'portrait');
$dompdf->render();
$dompdf->save('path/to/save/pdf-file.pdf');

In the code above, we generate the PDF using the Dompdf class and set the HTML content to display the image with the box shadow.

Customize the PDF:

You can customize the PDF further by using the Dompdf library to set the page size, margins, fonts, and other styles. For more information, check the Dompdf documentation: https://github.com/dompdf/dompdf.

That's it! With these steps, you should be able to add a box shadow to an image in Dompdf using PHP and the Intervention Image library.