如何生成pdf,老是报错 [ 2.0 版本 ]

public function outreport($result){
	ob_start();
	// Include the main TCPDF library (search for installation path).
	vendor('Pdf.tcpdf');

	//实例化
	$pdf = new \TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);

	// 设置文档信息 
	$pdf->SetCreator(PDF_CREATOR);
	$pdf->SetAuthor('Nicola Asuni');
	$pdf->SetTitle('TCPDF Example 001');
	$pdf->SetSubject('TCPDF Tutorial');
	$pdf->SetKeywords('TCPDF, PDF, example, test, guide');

	// 设置页眉和页脚信息
	$pdf->SetHeaderData('', '', '电脑人机工程评估报告', '', array(0,64,255), array(0,64,128));
	$pdf->setFooterData(array(0,64,0), array(0,64,128));

	// 设置页眉和页脚字体 
	$pdf->setHeaderFont(Array(PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN));
	$pdf->setFooterFont(Array(PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA));

	// 设置默认等宽字体 
	$pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);

	// 设置间距 
	$pdf->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT);
	$pdf->SetHeaderMargin(PDF_MARGIN_HEADER);
	$pdf->SetFooterMargin(PDF_MARGIN_FOOTER);

	// 设置分页 
	$pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);

	// set image scale factor
	$pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);

	// set some language-dependent strings (optional)
	if (@file_exists(dirname(__FILE__).'/lang/eng.php')) {
		require_once(dirname(__FILE__).'/lang/eng.php');
		$pdf->setLanguageArray($l);
	}

	// ---------------------------------------------------------

	// set default font subsetting mode
	$pdf->setFontSubsetting(true);

	//设置字体 
	$pdf->SetFont('dejavusans', '', 14, '', true);
	$pdf->SetFont('stsongstdlight', '', 10);

	// Add a page
	// This method has several options, check the source code documentation for more information.
	$pdf->AddPage();

	// set text shadow effect
	$pdf->setTextShadow(array('enabled'=>true, 'depth_w'=>0.2, 'depth_h'=>0.2, 'color'=>array(196,196,196), 'opacity'=>1, 'blend_mode'=>'Normal'));

	// 内容
	$html =$result['report'];

	// Print text using writeHTMLCell()
	$pdf->writeHTMLCell(0, 0, '', '', $html, 0, 1, 0, true, '', true);

	// ---------------------------------------------------------

	// Close and output PDF document
	// This method has several options, check the source code documentation for more information.
	$dtime = date('Y-m-d');
	$pdf->Output($dtime.'.pdf', 'I');

	//============================================================+
	// END OF FILE
	//============================================================+
		}
}

有报错信息没的阿，出啥问题了阿！

我还以为你想吃栗子