Скачать или смотреть How to Fix the foreach Loop to Print All Records in a MySQL Table to PDF with FPDF

Discover a straightforward solution to ensure your `foreach` loop prints all records from a MySQL table into a PDF file using FPDF instead of just one.
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This video is based on the question https://stackoverflow.com/q/63649091/ asked by the user 'Nima Bahar' ( https://stackoverflow.com/u/9652733/ ) and on the answer https://stackoverflow.com/a/63649154/ provided by the user 'RiggsFolly' ( https://stackoverflow.com/u/2310830/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Printing All Records from MySQL to PDF with FPDF

When working with PHP to generate PDF documents from database records, you might find yourself facing a common issue: your foreach loop is only printing one record instead of all of them. This can be particularly frustrating when you're trying to build a comprehensive report from your MySQL database. In this guide, we'll explore this problem in detail and provide a clear, step-by-step solution.

The Problem: Only One Record is Printed

Imagine you have a database table containing multiple records related to comments, and you want to display all of these comments in a PDF document. Initially, you might write your code as follows:

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

While this code may work technically, it only prints the last record because the PDF is generated and outputted inside the loop for every individual record. In such cases, you end up with just one PDF page that displays one comment instead of a series of comments spanning multiple pages.

The Solution: Rearranging the Code

To ensure that all records are printed into a single PDF file, you'll need to make a simple adjustment by moving the PDF initialization code outside of the foreach loop. This way, you can create the PDF document, add a page just once, and then populate it with all the records. Let’s restructure your code as follows:

Step-by-Step Code Adjustment

Initialize PDF Before the Loop: This allows you to create the PDF document once.

Add Pages and Cells Inside the Loop: You will then add a cell for each comment.

Output the PDF Document Once at the End: This consolidates all the comments into a single output.

Here’s the refactored code:

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

Explanation of the Updated Code

Initialization Outside the Loop: The FPDF object is created once before starting the loop.

Looping Through Comments: Each comment’s message is added as a cell in the PDF. Adding $pdf->Ln(); introduces a line break, ensuring that comments are displayed clearly without overlap.

Single Output Call: Finally, by calling $pdf->Output(); only once after the loop, you are consolidating all comments into one PDF file, making it successful in displaying all records.

Conclusion

By simply moving the PDF initialization code outside of your foreach loop, you can effectively ensure all relevant records from your MySQL table are printed into a single PDF document. This not only enhances your code's performance but also provides a much better end-user experience.

With these changes in mind, you can now create comprehensive and multi-page PDF reports from your MySQL database without any hassle. Happy coding!