Convert HTML to PDF in CakePHP

To convert HTML to PDF in CakePHP, you can use a library called TCPDF. Here are the steps to do it:

1. Download TCPDF library from http://www.tcpdf.org and extract it to the app/vendors directory in your CakePHP application.
   
   
2. In your controller, add the following code to load the TCPDF library:
   

   App::import('Vendor', 'tcpdf/tcpdf');

   
   
3. Create a new function in your controller that generates the PDF file. This function should create a new instance of the TCPDF class, set the PDF parameters and write the HTML content to the PDF file. Here is an example:
   

   public function generate_pdf() {
       // Create new instance of TCPDF
       $pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);
   
       // Set document information
       $pdf->SetCreator(PDF_CREATOR);
       $pdf->SetAuthor('Your Name');
       $pdf->SetTitle('PDF Title');
       $pdf->SetSubject('PDF Subject');
       $pdf->SetKeywords('PDF, CakePHP, TCPDF');
   
       // Set header and footer
       $pdf->setHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE, PDF_HEADER_STRING);
       $pdf->setFooterData(array(0,64,0), array(0,64,128));
   
       // Set margins
       $pdf->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT);
       $pdf->SetHeaderMargin(PDF_MARGIN_HEADER);
       $pdf->SetFooterMargin(PDF_MARGIN_FOOTER);
   
       // Set auto page breaks
       $pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);
   
       // Set font
       $pdf->SetFont('helvetica', '', 12);
   
       // Add a page
       $pdf->AddPage();
   
       // Get HTML content from a view file
       $html = $this->render('/ControllerName/view_name', 'layout_name');
   
       // Write HTML content to the PDF file
       $pdf->writeHTML($html, true, false, true, false, '');
   
       // Close and output PDF document
       $pdf->Output('pdf_name.pdf', 'I');
   }

4. In the above code, replace 'ControllerName' with the name of your controller and 'view_name' with the name of the view file that contains the HTML content to be converted to PDF. Replace 'layout_name' with the name of the layout file that you want to use to render the view.
   
   
5. You can now call the 'generate_pdf' function from your CakePHP application to generate the PDF file. The PDF file will be downloaded by the user as an attachment with the name 'pdf_name.pdf'.

Note: TCPDF supports many other options and settings that you can use to customize the PDF output. Refer to the TCPDF documentation for more information.