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I am trying to save generated pdf in custom folder but its not saving. I want to pdf to send as attachment in email
Here is my code generate and save pdf

public function email($timestamp=0, $load_id=0, $type=0)
 $this->load->library('tcpdf/Pdf');
 $pdf = new Pdf('P', 'mm', 'LETTER', true, 'UTF-8', false);
 $pdf->SetTitle('Document');
 $pdf->setPrintHeader(false);
 $pdf->setPrintFooter(false);
 $pdf->SetHeaderMargin(10);
 $pdf->SetLeftMargin(10);
 $pdf->SetRightMargin(10);
 $pdf->SetTopMargin(10);
 $pdf->SetAutoPageBreak(true, 25);
 $pdf->SetAuthor('Author');
 $pdf->SetDisplayMode('real', 'default');
 $pdf->Write(5, 'Cal Sierra Load Document'); // add a page
 $pdf->AddPage();
 // $carriers = $this->admin_model->getCarriers(array(), array(), 0,0,1,"","","",1);
 $load=$this->admin_model->getLoad($load_id);
 $pickupDrops=$this->admin_model->getPickupDrops(0,0,1,0,$load_id);
 $loadPickups=array();
 $loadDrops=array();
 if(!empty($pickupDrops))
 foreach($pickupDrops as $row)
 if($row['type']==1)
 $loadPickups=$row;
 else
 $loadDrops=$row;
 
 

 $data['load'] = $load;
 $data['loadPickups'] = $loadPickups;
 $data['loadDrops'] = $loadDrops;
 // $data['carriers'] = $carriers;
 $data['settings'] = $this->settings_model->getSettingsFile();
 $data['currentTime'] = $timestamp;

 // echo "<pre>";
 // print_r($data);
 // exit();

 switch ($type) 
 case 1:
 $html = $this->load->view('documents/doc1', $data, true);
 break;
 case 2:
 $html = $this->load->view('documents/doc2', $data, true);
 break;
 case 3:
 $html = $this->load->view('documents/doc3', $data, true);
 break;
 default:
 

 $pdf->Output('custom'.'Document.pdf', 'F');
 $this->Output("custom");

 exit();

I am not sure where put my folder to pdf i am also adding my folder layout picture https://i.stack.imgur.com/tUadw.png

Try adding a more complete path to the output function. Something like:

$pdf->output(FCPATH . "my/directory/path/" . "pdfName.pdf", 'F');