使用 mpdf 和 codeigniter 生成空白输出

Question

我一直在写这篇文章来生成pdf，但输出是空白的，并且没有显示错误，我已经输入了：

public function generate_pdf()
{
    $this->load->library('mpdf');
    $mpdf=new mPDF('utf-8','A4');
    $mpdf->WriteHTML('<p>HTML content goes here...</p>');
    $mpdf->Output();
}

当我把：

public function generate_pdf()
{
    $this->load->library('mpdf');
    $mpdf=new mPDF('utf-8','A4');
    $mpdf->debug = true;
    $mpdf->WriteHTML('<p>HTML content goes here...</p>');
    $mpdf->Output();
}

参考这个答案，我收到此错误：

Output has already been sent from the script - PDF file generation aborted.

Answer 1

它正在使用 ob_end_clean()擦除输出缓冲区并关闭输出缓冲

public function generate_pdf()
{
   ob_end_clean();
   $this->load->library('mpdf');
   $mpdf=new mPDF('utf-8','A4');
   $mpdf->debug = true;
   $mpdf->WriteHTML('<p>HTML content goes here...</p>');
   $mpdf->Output();
}