How Can I Merge PDF Files in PHP Using Ghostscript?

Merging PDF Files in PHP

In PHP, you can utilize Ghostscript to seamlessly merge multiple PDF files. Here's how you can accomplish it:

PHP Code:

$fileArray = ["name1.pdf", "name2.pdf", "name3.pdf", "name4.pdf"];

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

$cmd = "gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=$outputName ";

foreach($fileArray as $file) {
    $cmd .= $file . " ";
}

$result = shell_exec($cmd);

Process:

1. Initialize an array $fileArray containing the names of the PDF files to be merged.
2. Set up the output directory $datadir and the merged file name $outputName.
3. Construct the Ghostscript command $cmd with the necessary options and the list of PDF files.
4. Execute the command using shell_exec.

Prerequisites:

Before executing this code, ensure that you have the following installed:

• Ghostscript (gs on Linux or Ghostscript on Windows)
• For commercial use, you'll need a $25,000 annual license or must release your code open source under AGPL.

Additional Notes:

• Check the file paths and permissions to ensure the command runs without errors.
• The output merged PDF file will be available at the specified $outputName.
• Consider using a PDF library or Composer package for a more robust PDF merging solution in PHP.

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