dompdf codeigniter，我试图渲染两个htmls我得到渲染错误

dompdf codeigniter , i am trying to render two htmls i get error on render

here the error that happens when i run the second render

[Wed Jul 03 09:18:10 2013] [error] [client 127.0.0.1] PHP Fatal error:  Uncaught exception 'DOMPDF_Exception' with message 'No block-level parent found.  Not good.' in /var/www/onplans/application/libraries/dompdf/include/inline_positioner.cls.php:38
Stack trace:
#0 /var/www/onplans/application/libraries/dompdf/include/frame_decorator.cls.php(546): Inline_Positioner->position()
#1 /var/www/onplans/application/libraries/dompdf/include/inline_frame_reflower.cls.php(37): Frame_Decorator->position()
#2 /var/www/onplans/application/libraries/dompdf/include/frame_decorator.cls.php(556): Inline_Frame_Reflower->reflow(NULL)
#3 /var/www/onplans/application/libraries/dompdf/include/page_frame_reflower.cls.php(138): Frame_Decorator->reflow()
#4 /var/www/onplans/application/libraries/dompdf/include/frame_decorator.cls.php(556): Page_Frame_Reflower->reflow(NULL)
#5 /var/www/onplans/application/libraries/dompdf/include/dompdf.cls.php(817): Frame_Decorator->reflow()
#6 /var/www/onplans/application/controllers/timeline.php(957): DOMPDF->render()
#7 [internal function]: Timeline->generate_report_ in /var/www/onplans/application/libraries/dompdf/include/inline_positioner.cls.php on line 38, referer:


if ( $reportCouvs[0] == 1 ) { 
    //  $this->pdf->load_html( 'reports/report_comb_1', $Ddata );
    $this->pdf->load_view( 'reports/report_comb_1', $Ddata );
    $this->pdf->render();
    $pdfoutput = $this->pdf->output();
    $filename = "$report_dir/"."cover3.pdf";
    $fp = fopen( $filename, "a" );
    fwrite( $fp, $pdfoutput );
    fclose( $fp );
    $this->pdf->load_view( 'reports/report_comb_2', $Ddata );
    $this->pdf->render();
    $pdfoutputu = $this->pdf->output();
    $filenameu = "$report_dir/"."imagleft3.pdf";
    $fp = fopen( $filenameu, "a" );
    fwrite( $fp, $pdfoutputu);
    fclose( $fp );

} else if( $reportCouvs[0] == 2 ) {
    $this->pdf->load_view('reports/report_comb_2', $Ddata ); 
}

on the second render the app crashes

is it possible to render two files with dompdf

I have come up against this issue also. This error can happen for a few reasons. There are three options you can check:

• reinstalling your DOMPDF library
• make sure mbstring is installed/configured/enabled for PHP
• make sure you are re-initialising, or creating a new instance of DOMPDF when looping.

As it sounds like you have already output one PDF successfully, this indicates the first two options are likely not the issue. We can't see your complete code that relates to the issue, but it seems probable it is the third option.

If it is the third, then you would make sure the loop that creates the pdfs started with the line:

$this->pdf = new DOMPDF();