Скачать или смотреть Solving the Symfony: Unable to Render Image in PDF Issue with Dompdf

Learn how to resolve the issue of images not rendering in PDFs generated with the `Dompdf` library in your Symfony project. Follow our step-by-step guide to ensure your PDFs look great!
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This video is based on the question https://stackoverflow.com/q/66851188/ asked by the user 'Doraemon' ( https://stackoverflow.com/u/15503456/ ) and on the answer https://stackoverflow.com/a/66852795/ provided by the user 'StupidBoy' ( https://stackoverflow.com/u/15476284/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Solving the Symfony: Unable to Render Image in PDF Issue with Dompdf

Are you facing the frustrating issue of images not rendering in PDFs generated by Dompdf in your Symfony project? You’re not alone! Many developers encounter this problem when they try to convert HTML content to a PDF file, while the images render perfectly on the web page but fail to appear in the generated PDF. Let’s dive into the specifics of this issue and walk through a comprehensive solution.

Understanding the Problem

When you use Dompdf to render a PDF, it can sometimes fail to include images that are served from your local asset directory or external sources. This often occurs due to improper path settings or missing permissions for remote file access.

Common Causes of Image Rendering Issues in PDFs:

Path Issues: The paths to images are often relative in templates; they may not resolve correctly when generating PDFs.

Remote Access Configuration: By default, Dompdf may not allow remote file access, which can prevent images hosted outside the main application from being loaded.

The Solution

Step 1: Enable Remote File Access

In your Symfony project, you need to ensure that remote access is enabled in the PDF options. Here’s how you can set this up:

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Step 2: Load Your HTML Content

Next, ensure you are loading the correct HTML content into your PDF. You can render your view directly, making sure the HTML structure is set correctly:

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Step 3: Use Absolute Paths for Images

One of the most crucial steps in ensuring images render correctly in the PDF is to use absolute paths in your HTML templates. Update your image tags in the Twig template as follows:

[[See Video to Reveal this Text or Code Snippet]]

This adjustment tells Symfony to generate the full URL to your image, allowing Dompdf to access it without path issues.

Step 4: Render and Stream the PDF

Finally, follow through by rendering the PDF and streaming it to the browser.

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Complete Code Example

Here's a concise version of the complete code that ensures your images render properly in the generated PDF:

[[See Video to Reveal this Text or Code Snippet]]

Final Thoughts

By following these steps, you should be able to seamlessly render images in the PDFs generated by Dompdf within your Symfony project. Always remember to check paths and ensure that remote file access is enabled for a smooth experience. If you follow this guide, you should say goodbye to the issues that come with missing images in your PDF files! Happy coding!