如何使用 php 中的 addFromString 函数创建带有 PDF 文件的 zip 文件？

Question

我将这段代码分为两部分：

第一个给我创建一个空的 zip 文件并下载它。
第二个从我的数据库下载我用 base64 解码的 PDF 文件。

两者分开都能很好地工作。我希望能够合并它们并以 zip 格式下载我数据库中的两个 PDF 文件。

我想使用 addFromString 功能，而不是在我的服务器上创建文件夹，而是直接为用户下载 zip 文件。

你能帮帮我吗？感谢您的帮助

<?php


include '../include/classe_PDO.php';

$suivi = $_POST['suivi'];

// //ZIP PART
//Name zip folder with date
$dirzip = date('Ymd His')."_andromeda";

// Zip creation        
$nomzip = "C:/wamp64/www\Dylan/SAV/final/include/$dirzip.zip"; 
$zip = new ZipArchive;
if($zip -> open($nomzip, ZipArchive::CREATE ) === TRUE)
{ 
    $dir = opendir($chemin); 
    while($fichier = readdir($dir)) 
    { 
        if(is_file($chemin.$fichier)) 
        { 
          $zip -> addFromString($file, $decoded);
        } 
    } 
    $zip ->close(); 
} 

//Zip download
header('Content-Type: application/zip');
header('Content-Disposition: attachment; filename="'.basename($nomzip).'"');
header('Content-Length: ' . filesize($nomzip));

flush();
readfile($nomzip);  
         

//DOWNLOAD PART
 try {
  // Connect to db
  $db = new db('mysql:dbname=jotform; host=localhost', 'root', '');
  $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

  // Set SQL
  $sql = "SELECT * FROM `dhl` WHERE `submission_id` = :suivi";

  // Prepare query
  $query = $db->prepare($sql);

  // Execute query
  $query->execute(array(':suivi' => $suivi));

  foreach  ($query as $row) {
    
          $filedata = $row['label_envoi']; //get base64 data from query result
          $decoded = base64_decode($filedata); //decode base64 to binary

          $filedata2 = $row['label_retour']; //Second column
          $decoded2 = base64_decode($filedata2); 
          
          //set suitable HTTP response headers
          header('Content-Description: File Transfer'); 
          header('Content-Type: application/octet-stream'); 
          header('Content-Disposition: attachment; filename="label.pdf"');
          header('Expires: 0'); 
          header('Cache-Control: must-revalidate'); 
          header('Pragma: public'); 
          //output the binary file data in the body of the response
          echo $decoded;
          
  }


} catch (PDOException $e) {
  echo 'Error: ' . $e->getMessage();
}        



?>

Answer 1

您需要遍历数据库行并将每条解码文件数据添加到 zip 文件中。然后下载最后的zip。

例如：

include '../include/classe_PDO.php';

$suivi = $_POST['suivi'];

// //ZIP PART
//Name zip folder with date
$dirzip = date('Ymd His')."_andromeda";

// Zip creation        
$nomzip = "C:/wamp64/www/Dylan/SAV/final/include/$dirzip.zip"; 
$zip = new ZipArchive;

if ($zip->open($nomzip, ZipArchive::CREATE ) === TRUE)
{
  try {
    //connect to DB
    $db = new db('mysql:dbname=jotform; host=localhost', 'root', '');
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    //prepare and execute query
    $sql = "SELECT * FROM `dhl` WHERE `submission_id` = :suivi";
    $query = $db->prepare($sql);
    $query->execute(array(':suivi' => $suivi));

    foreach ($query as $row) {
      //decode base64 to binary
      $decoded = base64_decode($row['label_envoi']); 
      $decoded2 = base64_decode($row['label_retour']);
    
      //add to zip
      //N.B. if there could be more than one row returned by the database, you'll need to ensure the PDFs have unique names instead of these hard-coded ones
      $zip->addFromString("label1.pdf", $decoded);
      $zip->addFromString("label2.pdf", $decoded2);
    }
  }
  catch (PDOException $e) {
    echo 'Error: ' . $e->getMessage();
  }

  $zip ->close();

  //Zip download
  header('Content-Type: application/zip');
  header('Content-Disposition: attachment; filename="'.basename($nomzip).'"');
  header('Content-Length: ' . filesize($nomzip));

  flush();
  readfile($nomzip);
}
else
{
  echo "Error - Zip file could not be created";
}

如何使用 php 中的 addFromString 函数创建带有 PDF 文件的 zip 文件？

How to create a zip file with PDF files with the addFromString function in php?

php

mysql

zip