Tcpdf印地语句子显示问题

我正在尝试使用 PHP 编程语言中的 tcpdf 库创建 pdf 文件。从昨天开始尝试但仍然得到????????而不是印地语字体。 我试图显示这句话：

प्रविष्टि कर कुल बिक्री मूल्य वेट के साथ भार(ग्रा) टिन मात्रा(सं) भुगतान का प्रकार विवरण जारीकर्ता का्रड

我添加了 2 到 3 种不同的印地语字体，但只得到问号。如果您在 tcpdf 或 mpdf 中有很好的印地语示例，请指导我如何操作。我也曾经在 PHP 文件中设置 UTF-8、iso-8859-1 标准，但没有任何运气。你可以参考我下面的代码：

<?php
header('Content-Type: text/html; charset=UTF-8');
//header('Content-Type: text/html; charset=Windows-1252');


// Include the main TCPDF library (search for installation path).
require_once('tcpdf_include.php');

// create new PDF document
$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);

// set document information
$pdf->SetCreator(PDF_CREATOR);
$pdf->SetAuthor('Nicola Asuni');
$pdf->SetTitle('TCPDF Example 001');
$pdf->SetSubject('TCPDF Tutorial');
$pdf->SetKeywords('TCPDF, PDF, example, test, guide');

// set default header data
$pdf->SetHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE.' 007', PDF_HEADER_STRING, array(0,64,255), array(0,64,128));
$pdf->setFooterData(array(0,64,0), array(0,64,128));

// 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 default monospaced font
$pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);

// 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 (optional)
if (@file_exists(dirname(__FILE__).'/lang/eng.php')) {
    require_once(dirname(__FILE__).'/lang/eng.php');
    $pdf->setLanguageArray($l);
}
//TCPDF_FONTS::addTTFfont('../fonts/Devanagari/Devanagari.ttf', 'TrueType', "", 32);
//TCPDF_FONTS::addTTFfont('../fonts/Agra.svg', 'TrueTypeUnicode', "", 32);
// ---------------------------------------------------------

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

// Set font
// dejavusans is a UTF-8 Unicode font, if you only need to
// print standard ASCII chars, you can use core fonts like
// helvetica or times to reduce file size.
$pdf->SetFont('krutidev021', '', 14, '', true);

// 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'));

// Set some content to print
$html = "प्रविष्टि कर कुल बिक्री मूल्य वेट के साथ
भार(ग्रा) टिन मात्रा(सं) भुगतान का प्रकार विवरण जारीकर्ता कार्ड";

// Print text using writeHTMLCell()
$pdf->writeHTMLCell(0, 0, '', '', utf8_encode($html), 0, 1, 0, true, '', true);

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


$pdf->Output('example_001.pdf', 'I');

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

freesans、freesansb、freeserif、freeserifb字体有印地语支持，这些字体位于 tcpdf 字体文件夹中。所以设置字体$pdf->SetFont('freesans', '', 12);

完整代码

<?php
// Include the main TCPDF library (search for installation path).
require_once('tcpdf_include.php');

// create new PDF document
$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);

// set document information
$pdf->SetCreator(PDF_CREATOR);
$pdf->SetAuthor('Nicola Asuni');
$pdf->SetTitle('TCPDF Example 018');
$pdf->SetSubject('TCPDF Tutorial');
$pdf->SetKeywords('TCPDF, PDF, example, test, guide');

// set default header data
$pdf->SetHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE.' 018', PDF_HEADER_STRING);

// 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 default monospaced font
$pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);

// 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 data:
$lg = Array();
$l['a_meta_charset'] = 'UTF-8';
$l['a_meta_dir'] = 'ltr';
$l['a_meta_language'] = 'hi';
$lg['w_page'] = 'page';

// set some language-dependent strings (optional)
$pdf->setLanguageArray($lg);

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

// set font
$pdf->SetFont('freesans', '', 12);

// add a page
$pdf->AddPage();

// Hindi content
$htmlhindi = 'नमस्ते आप कैसे हैं';
$pdf->WriteHTML($htmlhindi, true, 0, true, 0);



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

//Close and output PDF document
$pdf->Output('example_018.pdf', 'I');

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