Using the TCPDF library:
<?
require_once("tcpdf/tcpdf.php");
$pdf = new TCPDF();
// set document information
$pdf->SetCreator(PDF_CREATOR);
$pdf->SetAuthor("my name");
$pdf->SetTitle("my doc");
$pdf->SetSubject("x");
$pdf->SetKeywords("a, b, c");
// set default header data
$pic = "/gfx/header.png";
$pdf->SetHeaderData(realpath($pic), "25", "Title");
// set header and footer fonts
$pdf->setHeaderFont(array(PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN));
$pdf->setFooterFont(array(PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA));
//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 image scale factor
$pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);
//set some language-dependent strings
$pdf->setLanguageArray($l);
//initialize document
$pdf->AliasNbPages();
// add a page
$pdf->AddPage();
// ---------------------------------------------------------
// set font
$pdf->SetFont("helvetica", "", 12);
// set a background color
$pdf->SetFillColor(230, 240, 255, true);
$pdf->SetFont("", "b", 16);
$pdf->Write(16, "some text\n", "", 0, 'C');
$pdf->Output("filename.pdf", "I");
?>