![]() The best 3 methods are explained here: #1: Expert Solution to Fix Unable to Add Watermark in PDF Error ![]() There are multiple ways to put a watermark on a PDF file. Ways to Solve Not Able to Add PDF Watermark Problem Then you cannot add a watermark to the particular PDF document. User Level Restriction: – It implies a password, which is required to open the PDF file. For this first remove the restriction and then insert the watermark in the PDF file. It means that you cannot edit, modify or add anything to the document. Owner-Level Restriction: – The PDF document is subject to owner-level restriction.$pdf -> Output ( 'F', 'my-document.If you are unable to put a watermark into a PDF document, then there could be mainly two possible reasons for the cause and they are $pdf -> Output ( 'D', 'my-document.pdf' ) Specify the file name of the PDF to download. You can use parameters in the Output() method to customize the PDF output. $pdf -> Output () Output PDF with Watermarkīy default, the Output() method will render the PDF file on the browser. $pdf -> Image ( $text_image, $xxx_final, $yyy_final, 0, 0, 'png' ) Render the generated PDF with watermark using the Output() function of Fpdi class.Add watermark image to PDF pages using importPage(), getTemplateSize(), addPage(), useTemplate(), and Image() methods of Fpdi class.Specify source PDF file and watermark image.The following example code adds a watermark image to an existing PDF file using PHP. $pdf -> Output () Add Watermark to PDF (image) $pdf -> useTemplate ( $tpl, 1, 1, $size, $size, TRUE ) $size = $pdf -> getTemplateSize ( $tpl ) $pagecount = $pdf -> setSourceFile ( $file ) Imagecopymerge ( $blank, $img, 0, 0, 0, 0, $width, $height, $op ) $color = imagecolorallocate ( $img, 0, 0, 0 ) Imagefilledrectangle ( $img, 0, 0, $width, $height, $bg ) $img = imagecreatetruecolor ( $width, $height ) $height = imagefontheight ( $font_size )* count ( $ts ) $width = imagefontwidth ( $font_size )* $width $width = max ( $width, strlen ( $string )) Render the generated PDF using the Output() function of Fpdi class.Add watermark to PDF pages using importPage(), getTemplateSize(), addPage(), useTemplate(), and Image() methods of Fpdi class.Initialize Fpdi class and set the source PDF file using setSourceFile() method.Set background and font color with imagecolorallocate() function.Create blank image with imagecreatetruecolor() function.Configure text font, weight, and height using PHP imagefontheight() and imagefontwidth() function.Specify source PDF file and watermark text.The following example code adds watermark text to the existing PDF file using PHP. Require_once( 'vendor/autoload.php' ) Add Watermark to PDF (text) Include autoloader to load FPDI library and helper functions in the PHP script. Note that: You don’t need to download the FPDF-FPDI library separately, all the required files are included in the source code. Run the following command to install FPDF and FPDI library at once using composer. You can add text or image as a watermark to existing PDF document using PHP. In this example script, we will use FPDF and FPDI libraries to add watermark images to PDF with PHP. In this tutorial, we will show you how to add watermark to existing PDF document using PHP. But, in this case, you cannot add a watermark to an existing PDF document. If you using a PHP library such as Dompdf to create PDF document, the watermark can be added at the time of PDF generation. In a PDF document, a watermark is used to make it unique by adding text/image/stamp over pages. We can easily create PDF document dynamically and convert HTML content to PDF using PHP. In the web application, a PDF file is created with HTML content to make dynamic data available for download. Generally, the PDF file is used to share text/image data for offline use. ![]() PDF (Portable Document Format) is a popular file format to work with text/graphics content.
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