PHP | How to merge multiple PDFs into single file using pdftk

Using PDFtk we can merge multiple files into a single file using a command like this:

Example : pdftk file1 file2 output file3.

Sample code to accomplish the same using PHP is given below:

$arrayOfPDFFiles;
$outputPDFName = “mergeResult.pdf”;
$dir =”Files/GeneratedPDFs/”;
for($i =0;$i<sizeOf($arrayOfPDFFiles);$i++)
{
$multiplePDFs = $multiplePDFs.” “.$dir.$arrayOfPDFFiles[$i];
}
$command = 'pdftk '.$multiplePDFs .” output “.$dir.$outputName;
passthru($command);

Note : For this code to work, please make sure pdftk is installed on your system.

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