238 lines
13 KiB
PHP
238 lines
13 KiB
PHP
<?php
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session_start();
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$downloadLink = null;
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$errorMessage = null;
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// Function to convert hex color to PDF color components (0-1 range)
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function hexToPdfColor($hex) {
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$hex = ltrim($hex, '#');
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$r = hexdec(substr($hex, 0, 2)) / 255;
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$g = hexdec(substr($hex, 2, 2)) / 255;
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$b = hexdec(substr($hex, 4, 2)) / 255;
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return sprintf('%.3f %.3f %.3f', $r, $g, $b);
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}
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if ($_SERVER['REQUEST_METHOD'] === 'POST') {
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// Basic check for mutool
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$mutoolPath = trim(shell_exec('which mutool'));
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if (empty($mutoolPath)) {
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$errorMessage = "Error: The required PDF processing tool (mupdf-tools) is not installed on the server. Please contact the administrator.";
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} else {
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if (isset($_FILES['pdfFile']) && $_FILES['pdfFile']['error'] === UPLOAD_ERR_OK) {
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$fileTmpPath = $_FILES['pdfFile']['tmp_name'];
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$fileType = mime_content_type($fileTmpPath);
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if ($fileType === 'application/pdf') {
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$uploadsDir = __DIR__ . '/uploads/';
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$downloadsDir = __DIR__ . '/downloads/';
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$uniqueId = uniqid('pdf_', true);
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$originalFileName = $uploadsDir . $uniqueId . '.pdf';
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$decompressedFileName = $uploadsDir . $uniqueId . '-decompressed.pdf';
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$recoloredFileName = $uploadsDir . $uniqueId . '-recolored.pdf';
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$outputFileName = $downloadsDir . $uniqueId . '-final.pdf';
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if (move_uploaded_file($fileTmpPath, $originalFileName)) {
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$color = $_POST['colorPicker'] ?? '#000000';
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$pdfColor = hexToPdfColor($color);
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$newColorCommand = $pdfColor . " rg";
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$newColorCommandStroke = $pdfColor . " RG";
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// 1. Decompress the PDF to make content streams editable
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shell_exec(escapeshellcmd("$mutoolPath clean -d " . escapeshellarg($originalFileName) . " " . escapeshellarg($decompressedFileName)));
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if (file_exists($decompressedFileName)) {
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$content = file_get_contents($decompressedFileName);
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// 2. Replace existing color definitions with the new color
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// This is a broad approach and might affect non-text elements
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// Pattern for RGB color (non-stroking)
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$content = preg_replace('/\d*\.?\d+\s+\d*\.?\d+\s+\d*\.?\d+\s+rg/', $newColorCommand, $content);
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// Pattern for Grayscale (non-stroking)
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$content = preg_replace('/\d*\.?\d+\s+g/', $newColorCommand, $content);
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// Pattern for CMYK (non-stroking)
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$content = preg_replace('/\d*\.?\d+\s+\d*\.?\d+\s+\d*\.?\d+\s+\d*\.?\d+\s+k/', $newColorCommand, $content);
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// Also replace stroking colors to be safe
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$content = preg_replace('/\d*\.?\d+\s+\d*\.?\d+\s+\d*\.?\d+\s+RG/', $newColorCommandStroke, $content);
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$content = preg_replace('/\d*\.?\d+\s+G/', $newColorCommandStroke, $content);
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$content = preg_replace('/\d*\.?\d+\s+\d*\.?\d+\s+\d*\.?\d+\s+\d*\.?\d+\s+K/', $newColorCommandStroke, $content);
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file_put_contents($recoloredFileName, $content);
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// 3. Re-compress and clean the PDF to fix structure and xref table
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shell_exec(escapeshellcmd("$mutoolPath clean " . escapeshellarg($recoloredFileName) . " " . escapeshellarg($outputFileName)));
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if (file_exists($outputFileName)) {
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$downloadLink = '/downloads/' . basename($outputFileName);
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$_SESSION['last_download'] = $downloadLink;
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} else {
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$errorMessage = "Failed to rebuild the PDF file.";
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}
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// 4. Clean up temporary files
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@unlink($decompressedFileName);
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@unlink($recoloredFileName);
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@unlink($originalFileName);
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} else {
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$errorMessage = "Failed to decompress the PDF for editing.";
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@unlink($originalFileName);
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}
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} else {
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$errorMessage = "Failed to move uploaded file.";
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}
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} else {
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$errorMessage = "Invalid file type. Please upload a PDF.";
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}
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} else {
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$errorMessage = "File upload failed. Please try again.";
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}
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}
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}
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// Check for a download link from a previous successful submission
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if (isset($_SESSION['last_download'])) {
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$downloadLink = $_SESSION['last_download'];
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unset($_SESSION['last_download']);
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}
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?>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>PDF Text Recolor - Free Online Tool</title>
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<meta name="description" content="Free online tool to change the text color of your PDF files. Upload your file, pick a new color, and download the modified PDF instantly.">
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<!-- Open Graph / Facebook & Twitter Card Meta Tags -->
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<?php
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$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
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$host = $_SERVER['HTTP_HOST'];
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$imageUrl = $protocol . $host . '/assets/pasted-20250928-215140-17dd4a54.png';
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$pageUrl = $protocol . $host . $_SERVER['REQUEST_URI'];
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?>
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<meta property="og:title" content="PDF Text Recolor - Free Online Tool">
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<meta property="og:description" content="Free, online tool to change the text color of your PDF files. Upload your file, pick a new color, and download.">
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<meta property="og:image" content="<?php echo $imageUrl; ?>">
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<meta property="og:url" content="<?php echo $pageUrl; ?>">
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<meta property="og:type" content="website">
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<meta name="twitter:card" content="summary_large_image">
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<meta name="twitter:title" content="PDF Text Recolor - Free Online Tool">
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<meta name="twitter:description" content="Free, online tool to change the text color of your PDF files. Upload your file, pick a new color, and download.">
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<meta name="twitter:image" content="<?php echo $imageUrl; ?>">
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<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet">
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<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css">
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<link rel="preconnect" href="https://fonts.googleapis.com">
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<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
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<link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap" rel="stylesheet">
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<link rel="stylesheet" href="assets/css/custom.css?v=<?php echo time(); ?>">
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</head>
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<body>
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<nav class="navbar navbar-expand-lg navbar-light bg-white shadow-sm">
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<div class="container">
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<a class="navbar-brand" href="/">PDF Text Recolor</a>
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<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
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<span class="navbar-toggler-icon"></span>
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</button>
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<div class="collapse navbar-collapse" id="navbarNav">
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<ul class="navbar-nav ms-auto">
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<li class="nav-item"><a class="nav-link" href="#how-it-works">How It Works</a></li>
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<li class="nav-item"><a class="nav-link" href="/privacy.php">Privacy</a></li>
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</ul>
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</div>
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</div>
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</nav>
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<main>
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<section class="hero text-center">
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<div class="container">
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<div class="row justify-content-center">
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<div class="col-lg-8">
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<h1 class="display-4 fw-bold">Recolor Text in Your PDFs, Instantly</h1>
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<p class="lead text-muted mb-5">Free, online tool to change the text color of your PDF files. Upload your file, pick a new color, and download.</p>
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<div class="card p-4 p-md-5">
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<?php if ($errorMessage): ?>
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<div class="alert alert-danger">
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<?php echo htmlspecialchars($errorMessage); ?>
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</div>
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<?php endif; ?>
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<?php if ($downloadLink): ?>
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<div class="alert alert-success text-center">
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<h4>Your PDF is ready!</h4>
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<p>The text color has been changed. Click the button below to download your file.</p>
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<a href="<?php echo htmlspecialchars($downloadLink); ?>" class="btn btn-success btn-lg w-100">
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<i class="bi bi-download me-2"></i> Download Your Recicolored PDF
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</a>
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<hr>
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<a href="/" class="btn btn-secondary mt-2">Start Over</a>
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</div>
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<?php else: ?>
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<form id="recolor-form" method="POST" enctype="multipart/form-data">
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<div class="mb-3">
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<label for="pdfFile" class="form-label fs-5">1. Upload your PDF</label>
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<input class="form-control form-control-lg" type="file" id="pdfFile" name="pdfFile" accept=".pdf" required>
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</div>
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<div class="mb-4">
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<label for="colorPicker" class="form-label fs-5">2. Pick a new color</label>
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<input type="color" class="form-control form-control-color w-100" id="colorPicker" name="colorPicker" value="#4A90E2" title="Choose your color">
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</div>
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<button type="submit" class="btn btn-primary btn-lg w-100">Recolor & Download <i class="bi bi-arrow-right-circle ms-2"></i></button>
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</form>
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<?php endif; ?>
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</div>
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</div>
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</div>
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</div>
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</section>
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<section id="how-it-works" class="py-5">
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<div class="container">
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<h2 class="text-center mb-5">How It Works</h2>
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<div class="row text-center g-4">
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<div class="col-md-4">
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<div class="card h-100 p-4">
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<i class="bi bi-cloud-arrow-up step-icon mb-3"></i>
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<h3 class="h4">Upload</h3>
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<p class="text-muted">Select the PDF document you want to modify from your device.</p>
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<img src="https://picsum.photos/seed/upload-step/400/300" class="img-fluid rounded mt-3" alt="Icon representing uploading a file">
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</div>
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</div>
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<div class="col-md-4">
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<div class="card h-100 p-4">
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<i class="bi bi-palette step-icon mb-3"></i>
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<h3 class="h4">Pick Color</h3>
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<p class="text-muted">Choose the new color for the text using the simple color picker.</p>
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<img src="https://picsum.photos/seed/color-step/400/300" class="img-fluid rounded mt-3" alt="Icon representing a color palette">
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</div>
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</div>
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<div class="col-md-4">
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<div class="card h-100 p-4">
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<i class="bi bi-file-earmark-arrow-down step-icon mb-3"></i>
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<h3 class="h4">Download</h3>
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<p class="text-muted">Your new PDF will be ready for download immediately, with no watermarks.</p>
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<img src="https://picsum.photos/seed/download-step/400/300" class="img-fluid rounded mt-3" alt="Icon representing downloading a file">
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</div>
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</div>
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</div>
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</div>
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</section>
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</main>
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<footer class="footer mt-auto py-4 bg-light">
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<div class="container text-center">
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<p class="text-muted mb-0">© <?php echo date("Y"); ?> PDF Text Recolor. All Rights Reserved. | <a href="/privacy.php" class="text-muted">Privacy Policy</a></p>
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</div>
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</footer>
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<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"></script>
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<script src="assets/js/main.js?v=<?php echo time(); ?>"></script>
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</body>
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</html>
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