echo 相关问题

我有这个PHP脚本（process.php）：我有这个 PHP 脚本（process.php）： <?php // Include necessary libraries for database, PDF generation, and ZIP compression. require_once('db_connection.php'); require_once('tcpdf/tcpdf.php'); if (isset($_POST['submit'])) { // Get uploaded file data $csvFile = $_FILES['csv_file']['tmp_name']; // Initialize progress variables $totalRecords = count(file($csvFile)) - 1; // Subtract 1 for the header row $processedRecords = 0; // Create a temporary directory to store the PDF files $tempDir = '/var/www/html/insuromatic/temp/'; if (!file_exists($tempDir)) { mkdir($tempDir, 0777, true); } // Create a ZipArchive instance $zip = new ZipArchive(); $zipFileName = 'pdf_archive.zip'; if ($zip->open($zipFileName, ZipArchive::CREATE | ZipArchive::OVERWRITE) === true) { // Open and read the CSV file if (($handle = fopen($csvFile, "r")) !== FALSE) { // Skip the first row (header) fgetcsv($handle); while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) { // Assuming your CSV columns are in order (column1, column2, column3) $column1 = $data[0]; $column2 = $data[1]; $column3 = $data[2]; // Insert data into the MySQL database $sql = "INSERT INTO import_csv_data (id, name, email) VALUES ('$column1', '$column2', '$column3')"; mysqli_query($conn, $sql); // Generate a PDF for this record $pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false); $pdf->AddPage(); $pdf->SetFont('helvetica', '', 12); $pdf->Cell(0, 10, "ID: $column1", 0, 1); $pdf->Cell(0, 10, "Naam: $column2", 0, 1); $pdf->Cell(0, 10, "Email: $column3", 0, 1); // Customize the PDF content as needed // Save the PDF in the temporary directory $pdfFileName = $tempDir . "record_$column1.pdf"; $pdf->Output($pdfFileName, 'F'); // Add the PDF to the ZIP archive $zip->addFile($pdfFileName, "record_$column1.pdf"); // Delete the record from the database $deleteSql = "DELETE FROM import_csv_data WHERE id = '$column1'"; mysqli_query($conn, $deleteSql); // Update progress $processedRecords++; // Send progress to the client // echo "Processed $processedRecords out of $totalRecords records.<br />\n"; // LINE 65 // Flush the output buffer to send data immediately to the client ob_flush(); flush(); // Close the PDF document $pdf->Close(); } fclose($handle); } // Close the ZIP archive $zip->close(); // Remove temporary PDF files array_map('unlink', glob($tempDir . '*.pdf')); rmdir($tempDir); // Provide the ZIP archive for download header("Content-Type: application/zip"); header("Content-Disposition: attachment; filename=\"$zipFileName\""); ob_end_clean(); flush(); readfile($zipFileName); // LINE 89 unlink($zipFileName); // Delete the ZIP file after download } // Close the MySQL connection mysqli_close($conn); } ?> 服务器配置： Apache/2.4.57 (Debian) PHP 8.0.30 FPM/FastCGI 问题：当第 89 行的 readfile() 语句被注释掉时，第 65 行的 echo() 语句工作正常，我看到屏幕上回显了进度当第 65 行的 echo() 语句被注释掉时，第 89 行的 readfile() 语句工作正常，我得到了包含创建的 PDF 文件的 ZIP 下载但是，当两条线都启用时，在进度回显到屏幕后，我在屏幕上看到很多垃圾（我认为是原始 PDF 内容）。 ZIP 不提供下载。不幸的是，我不知道我做错了什么。我尝试了 ob_end_clean()、ob_end_flush() 等几个地方，但没有运气，垃圾不断被打印。有人能指出我正确的方向吗？ //编辑：重做版本： <?php // Include necessary libraries for database, PDF generation, and ZIP compression. require_once('db_connection.php'); require_once('tcpdf/tcpdf.php'); if (isset($_POST['submit'])) { // Get uploaded file data $csvFile = $_FILES['csv_file']['tmp_name']; // Initialize progress variables $totalRecords = count(file($csvFile)) - 1; // Subtract 1 for the header row $processedRecords = 0; // Create a temporary directory to store the PDF files $tempDir = '/var/www/html/insuromatic/temp/'; if (!file_exists($tempDir)) { mkdir($tempDir, 0777, true); } // Open and read the CSV file if (($handle = fopen($csvFile, "r")) !== FALSE) { // Skip the first row (header) fgetcsv($handle); while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) { // Assuming your CSV columns are in order (column1, column2, column3) $column1 = $data[0]; $column2 = $data[1]; $column3 = $data[2]; // Insert data into the MySQL database $sql = "INSERT INTO import_csv_data (id, name, email) VALUES ('$column1', '$column2', '$column3')"; mysqli_query($conn, $sql); // Generate a PDF for this record $pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false); $pdf->AddPage(); $pdf->SetFont('helvetica', '', 12); $pdf->Cell(0, 10, "ID: $column1", 0, 1); $pdf->Cell(0, 10, "Naam: $column2", 0, 1); $pdf->Cell(0, 10, "Email: $column3", 0, 1); // Customize the PDF content as needed // Save the PDF in the temporary directory $pdfFileName = $tempDir . "record_$column1.pdf"; $pdf->Output($pdfFileName, 'F'); // Delete the record from the database $deleteSql = "DELETE FROM import_csv_data WHERE id = '$column1'"; mysqli_query($conn, $deleteSql); // Update progress $processedRecords++; // Send progress to the client echo "Processed $processedRecords out of $totalRecords records.<br />\n"; // Flush the output buffer to send data immediately to the client ob_flush(); flush(); // Close the PDF document $pdf->Close(); } fclose($handle); } // Close the MySQL connection mysqli_close($conn); // Output a JavaScript script to perform the redirection echo '<script>window.location.href = "download.php";</script>'; //Prevent any further execution exit; } ?> 下载.php： <?php // Specify the directory containing your PDF files $directory = '/var/www/html/insuromatic/temp'; // Define the name of the ZIP archive file $zipFileName = 'pdf_archive.zip'; // Create a ZipArchive object $zip = new ZipArchive(); // Open the ZIP archive for writing if ($zip->open($zipFileName, ZipArchive::CREATE | ZipArchive::OVERWRITE) === true) { // Create a recursive directory iterator to scan the directory $iterator = new RecursiveDirectoryIterator($directory); $files = new RecursiveIteratorIterator($iterator); // Loop through all files in the directory foreach ($files as $file) { // Check if the file is a PDF if ($file->isFile() && strtolower(pathinfo($file, PATHINFO_EXTENSION)) === 'pdf') { // Add the PDF file to the ZIP archive with its original name $zip->addFile($file, $file->getBasename()); } } // Close the ZIP archive $zip->close(); // Remove temporary PDF files $tempDir = '/var/www/html/insuromatic/temp/'; array_map('unlink', glob($tempDir . '*.pdf')); rmdir($tempDir); // Set the appropriate headers for a ZIP file download header('Content-Type: application/zip'); header('Content-Disposition: attachment; filename="' . $zipFileName . '"'); header('Content-Length: ' . filesize($zipFileName)); // Send the ZIP file to the client's browser readfile($zipFileName); // Delete the ZIP file from the server (optional) unlink($zipFileName); exit; // Terminate the script } else { echo "Failed to create ZIP archive."; } ?> 为了 ob_end_clean(); 要工作，您需要首先使用启动输出缓冲 ob_start(); 并且不得使用 ob_flush(); 介于两者之间。

php echo readfile

回答 1 投票 0

WooCommerce 产品页面上没有产品详细信息

我有以下代码，用于显示包含当前产品页面中的一些信息的模式：函数 Visualizer_modal() { 如果（！is_product（））{ 返回; ...

php wordpress woocommerce echo product

回答 1 投票 0

如何在shell脚本中使用echo命令打印带有变量的字符串

我在终端中定义了一个 shell 变量，然后使用 echo 命令输出带有该变量的字符串，并且它在终端中运行良好。但是当我在 shell 脚本中使用相同的命令时...

linux bash shell environment-variables echo

回答 1 投票 0

调用我的 Windows .bat 时 ECHO 是打开还是关闭？

当我从另一个 Windows .bat 文件调用一个 Windows .bat 文件时，被调用的文件能否判断调用者中的 ECHO 是 ON 还是 OFF？当输入 .bat 文件时，ECHO 将设置为 ON（即使它在 CALLER 中为 OFF）...