Could not download PDF file using FPDF and php - php

Question

I need to write data from MySQL table to PDF file and download using PHP and MySQL. For this I am using FPDF to create PDF file but in my case its not working as expected and throwing the below error.
Error:
<b>Warning</b>: file_put_contents(report_22-05-2019 18:36:24.pdf): failed to open stream: Permission denied in <b>/var/www/hlwcab.com/public_html/cab/include/libs/fpdf.php</b> on line <b>1021</b><br />
<br />
<b>Fatal error</b>: Uncaught exception 'Exception' with message 'FPDF error: Unable to create output file: report_22-05-2019 18:36:24.pdf'
I am providing my code below.
require_once '../../../include/libs/fpdf.php';
class PDF extends FPDF{
// Page header
function Header(){
// Logo
$this->Image('../../../admin/img/HLW-CabManagementLogo.png',10,-1,70);
$this->SetFont('Arial','B',13);
// Move to the right
$this->Cell(80);
// Title
$this->Cell(80,10,'Report List',1,0,'C');
// Line break
$this->Ln(20);
}
// Page footer
function Footer(){
// Position at 1.5 cm from bottom
$this->SetY(-15);
// Arial italic 8
$this->SetFont('Arial','I',8);
// Page number
$this->Cell(0,10,'Page '.$this->PageNo().'/{nb}',0,0,'C');
}
}
if ($_REQUEST["action"]=="downloadMonthlyReportData") {
$data=array();
$start_time=$_POST['start_time'];
$end_time=$_POST['end_time'];
$sql="select * from cb_wallet_driver_logs order by id desc";
$stmt = $db->prepare($sql);
if ($stmt->execute()) {
$row = $stmt->fetchAll();
$number_of_rows= count($row);
if ($number_of_rows > 0) {
$slno=1;
foreach ($row as $key => $value) {
$last_update=$value['last_update'];
$owner_id=$value['owner_id'];
$sql="select * from cb_owner_info where owner_id=:owner_id";
$stmt = $db->prepare($sql);
$stmt->bindParam(':owner_id', htmlspecialchars(strip_tags($owner_id)));
if ($stmt->execute()) {
$orow = $stmt->fetchAll();
$number_of_orows= count($orow);
if ($number_of_orows > 0) {
foreach ($orow as $key => $val) {
$owner_name=$val['name'];
}
}
}
$dt = new DateTime($last_update);
$odate=$dt->format('d-m-Y');
$ndate=date('d-m-Y',strtotime($odate));
$stdate=date('d-m-Y',strtotime($start_time));
$endate=date('d-m-Y',strtotime($end_time));
if ($ndate >= $stdate && $ndate <= $endate) {
$data[]=array("sl_no"=>$slno,"owner_name"=>$owner_name,"last_update"=>$last_update,"book_id"=>$value['book_id'],"operator_total"=>$value['operator_total'],"ride_total"=>$value['ride_total']);
}
$slno++;
}
}
}
$result1=array();
if (count($data) > 0) {
$pdf = new PDF();
//header
$pdf->AddPage();
//foter page
$pdf->AliasNbPages();
$pdf->SetFont('Arial','B',12);
$column[]=array("Sl No","Owner name","Date","Booking ID","Operator Total","Ride Total");
//print_r($column);exit;
foreach ($column as $key => $value) {
$pdf->Cell(40,12,$value,1);
}
foreach ($data as $key => $value) {
$pdf->Ln();
foreach ($value as $column) {
$pdf->Cell(40,12,$column,1);
}
}
$today=date('d-m-Y H:i:s');
$filename='report_'.$today.'.pdf';
$pdf->Output($filename, "F");
$result1["msg"] = "Succesfully Downloaded...";
}else{
header("HTTP/1.0 401 Unauthorized");
$result1["msg"] = "No record to download...";
}
//print_r($result1);exit;
echo json_encode($result1);
}
Here I am fetching the data from MySQL which is happening and writing those data into PDF file. Also as per error I set the 777 permission but still those errors are coming. Here I need to create the PDF file and download it in the browser.