Help! My Report Generation Script Is Overlapping on Page Breaks After 3 Pages

[mabubilal]

Body

Hey everyone,

I'm currently working on a report generation feature for a lab management system using PHP and generating PDFs with the mpdf library. Everything works fine, but when the report goes beyond two pages, I keep facing an issue where the text from the previous page overlaps the text on the next page, specifically after three pages. The overlap only occurs when we have a large amount of data on the report, such as when multiple tests are included in a single report. It’s causing the PDF to break formatting when there’s too much data.

I tried using the page-break properties in my CSS and also applied some custom margin adjustments, but it doesn’t seem to solve the problem.

Here’s the relevant part of the code I'm using to generate the report:

`

Regards: https://www.concretesrichmondva.com/

`` 'A4', 'margin_top' => 20, 'margin_left' => 15, 'margin_right' => 15, 'margin_bottom' => 25, ]);

$html = '

<style> .page-break { page-break-before: always; } .content { font-size: 12px; line-height: 1.5; } .test-results { margin-top: 15px; } .test-header { background-color: #f0f0f0; padding: 8px; font-weight: bold; } .test-data { padding: 8px; } .footer { text-align: center; font-size: 10px; color: #555; } </style>

Test Report

Patient: John Doe

Test Date: '. date("d-m-Y") .'

';

for ($i = 0; $i < 100; $i++) { // Simulating a lot of tests
$html .= '

';
}

$html .= '

Test	Result	Unit	Reference Range
Test '. ($i + 1) .'	Result '. ($i + 1) .'	mg/dL	30 - 150

Generated by Lab Management System

';

$mpdf->WriteHTML($html);
$mpdf->Output();
?>``
Issue Details:

• Overlapping Pages: When the report extends beyond three pages, the content from one page seems to bleed over to the next.

• Test Data Overflow: The report might contain a lot of test data (as shown in the loop). With 100 test results, I run into an issue where the PDF is not breaking pages correctly after the second page, causing text and table rows to be cut off or overlap.

Things I've Tried:

• Applying page-break-before: always; and page-break-after: always; in various spots.
• Adjusting the margin-bottom to allow more room for content.
• Using the mpdf->SetAutoPageBreak(true, 15); method.

What am I Missing? Is there something I'm overlooking in handling page breaks in a large report? Should I be adding more dynamic content-based logic to handle breaks better? Or is there an alternative way to manage dynamic page lengths?

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[ghost]

Your issue likely stems from mpdf not correctly handling automatic page breaks for large dynamic content. Try using $mpdf->SetAutoPageBreak(true, 15); before calling WriteHTML(), and ensure all large elements (like tables) have page-break-inside: avoid; in CSS. If issues persist, wrap each test entry in

and experiment with mpdf->AddPage() where necessary.