解析错误：语法错误，C：\ wamp \ www \ calculater \ wp-content \ themes \ calculater \ page.php中的意外“使用”（T_USE）行[duplicate]

ob_start();  
require_once '\dompdf\autoload.inc.php';

use Dompdf\Dompdf;

 //use Dompdf\Dompdf;

// instantiate and use the dompdf class
$dompdf = new DOMPDF();
$html = "
print_r($_POST);
";

$dompdf->loadHtml($html);
$dompdf->setPaper('A4', 'landscape');
$dompdf->render();
$pdf = $dompdf->output();
file_put_contents("page.pdf", $pdf);

?>  
<a href="./page.pdf" download="page.pdf">Download the pdf</a>
   <?php
exit;
?>

I try to do downloadable PDF script but getting parse error.

</div>

You have problem with use of use:)

The use keyword must be declared in the outermost scope of a file (the global scope) or inside namespace declarations. This is because the importing is done at compile time and not runtime, so it cannot be block scoped.

Try this code:

use Dompdf\Dompdf;

ob_start();  
require_once '\dompdf\autoload.inc.php';

// instantiate and use the dompdf class
$dompdf = new DOMPDF();
$html = "
print_r($_POST);
";

$dompdf->loadHtml($html);
$dompdf->setPaper('A4', 'landscape');
$dompdf->render();
$pdf = $dompdf->output();
file_put_contents("page.pdf", $pdf);

?>  
<a href="./page.pdf" download="page.pdf">Download the pdf</a>
   <?php
exit;
?>