How to Merge Multiple PDF Files into One Using PHP?

Merging PDF Files using PHP

In the digital age, the need to combine PDF files seamlessly has become crucial. This article aims to guide you through the process of merging PDF files using PHP, offering a detailed solution to the commonly asked question:

Question: How can I merge multiple PDF files into a single document using PHP?

Answer:

Utilizing Ghostscript, a versatile command-line tool, we can achieve PDF file merging efficiently. While a commercial license for Ghostscript is required for commercial use, non-commercial use allows for distribution under the AGPL license (ensuring the release of your code as open source).

Here's a comprehensive PHP code snippet to help you get started:

$fileArray= array("name1.pdf","name2.pdf","name3.pdf","name4.pdf");

$datadir = "save_path/";
$outputName = $datadir."merged.pdf";

$cmd = "gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=$outputName ";
//Add each pdf file to the end of the command
foreach($fileArray as $file) {
    $cmd .= $file." ";
}
$result = shell_exec($cmd);

Usage Instructions:

1. Create an array of PDF file names (e.g., $fileArray).
2. Define the destination directory ($datadir) where the merged PDF will be saved.
3. Call the gs command (part of Ghostscript) using the necessary command-line options.
4. Loop through the $fileArray and append each PDF file to the command.
5. Execute the command using shell_exec().

Note: Before attempting to merge PDF files, ensure that Ghostscript is installed on your system. Depending on your operating system, you may need to obtain Linux's gs package, macOS's Ghostscript package, or Windows' Ghostscript package.

Using this code snippet, you can effortlessly merge multiple PDF files, streamlining your document management tasks.

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