How to set pdf page size in php

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[mPDF 7.x] See format parameter and Example #2 on mPDF __construct documentation page: // Define a page size/format by array - page will be The mPDF docs state that the first argument of Output() is the file path, second is the saving mode - you need to set it to 'F' . $mpdf->Output('filename.pdf',' Now, where it says “Letter” next to Adobe PDF Page Size, click on it. Easy way to configure the page size in Google Docs to any of the A sizes: 4A0,Printing to Paper with correct page size. Note: Sometimes, the page document size does not always match the prebuilt page sizes in PDF Complete. I have a PDF file.I would to get it height and width in mm.So I do an exec(pdfinfo );I have this result : Creator: Adobe InDesign CS5 (7.0.3) Producer: php'); // initiate FPDI $pdf = new FPDI(); // add a page $pdf->AddPage(); // set the source file $pdf->setSourceFile("Fantastic-Speaker.pdf"); // import page 1 $pageLayout = array($width, $height); // or array($height, $width) $pdf = new TCPDF('p', 'pt', $pageLayout, true, 'UTF-8', false);.