Multiple downloads with PHP and mPDF

Question

I am trying to perform a function in PHP that performs several downloads of the PDF file within a loop. The problem is that it only downloads once the file independent of the array size.

Follows code:

$testes = array('teste','teste2');

foreach ($testes as $teste) {

   $arquivoHtml = file_get_contents(__SYSTEM_URL__.'/templates/teste.html');

   $arquivoHtml = str_replace('%TESTE%', $teste, $arquivoHtml);

   $mpdf0 = new mPDF('', 'A4', 0, 'Tahoma', 0, 0, 0, 0, 0, 0, 0, 0, 'P');

   $mpdf0 -> WriteHTML(utf8_encode($arquivoHtml));
   $mpdf0 -> Output("{$teste}.pdf", 'D');
}   

Answer 1

Actually, this code will only be executed once, because, the default is one request at a time and in the command of mpdf->Output has the output of a download.

To do something like this you need to generate the PDF, compress them and then download those PDF, an example would be the generation of a file Zip and then at the end of the generation of these PDF would download at once, in order for this code to work a folder has to be created temp in the execution of that script.

Code

_{Observing: the current code had changes for this mainly in the generation with the template, and paths, stay tuned to these modifications and something else.}

<?php

require('vendor/autoload.php');

// Criando PDF temporário
$testes = array('teste1', 'teste2');
$arquivoHtml = file_get_contents('templates/teste.html');
foreach ($testes as $teste) 
{    
    $arquivoNew = str_replace('%TESTE%', $teste, $arquivoHtml);
    $mpdf0 = new mPDF('', 'A4', 0, 'Tahoma', 0, 0, 0, 0, 0, 0, 0, 0, 'P');
    $mpdf0->WriteHTML(utf8_encode($arquivoNew));
    $mpdf0->Output("temp/{$teste}.pdf", 'F');    
}


// Criando Zip Temporário
$cwd = "temp/";
$nameZip = "arquivos_".(uniqid()).".zip";
$zip = new ZipArchive();
if ($zip->open($nameZip, ZIPARCHIVE::CREATE) === true) 
{
    $open = opendir($cwd);
    while ($folder = readdir($open)) {
        if ($folder != '.' && $folder != '..') {
            $arq = str_replace('./', '', $cwd . '/' . $folder);
            $zip->addFile($arq);            
        }
    }
}
$zip->close();

// Removendo PDF Temporários
$open = opendir($cwd);
while ($folder = readdir($open)) 
{
    if ($folder != '.' && $folder != '..') 
    {        
        unlink($cwd . '/' .$folder);        
    }
}
// Download ZipFile PDF
header('Content-Description: File Transfer');
header('Content-Disposition: attachment; filename="'.$nameZip.'"');
header('Content-Type: application/octet-stream');
header('Content-Transfer-Encoding: binary');
header('Content-Length: ' . filesize($aquivoNome));
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Expires: 0');
readfile($nameZip);

// Removendo Zip Temporário
unlink($nameZip);

References

• mpdf/mpdf
• Zipping directory with PHP

Answer 2

It’s because of this line:

$arquivoHtml = str_replace('%TESTE%', $teste, $arquivoHtml);

you have to replace the name here first:

__SYSTEM_URL__.'/templates/teste.html'

And then add to file_get_contents

It only downloads one because it only takes the test.html

Code:

$testes = array('teste','teste2');

foreach ($testes as $teste) {

   $arquivo = str_replace('%TESTE%', $teste, __SYSTEM_URL__.'/templates/teste.html');

   $arquivoHtml = file_get_contents($arquivo);

   $mpdf0 = new mPDF('', 'A4', 0, 'Tahoma', 0, 0, 0, 0, 0, 0, 0, 0, 'P');

   $mpdf0 -> WriteHTML(utf8_encode($arquivoHtml));
   $mpdf0 -> Output("{$teste}.pdf", 'D');
}