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I have a php program that joins thousands of pdf files into one just to send it to the printer, but the moment I go beyond 1024 I get the error:


I have followed all the tutorials I have found, I have modified the /proc/sys/fs/file-max file

I have tried:
sysctl -w fs.file-max=600000
but I'm still the same as I was, as soon as I go beyond 1024 open files the program stops and the error appears

AH01071: Got error 'PHP message: PHP Warning: fopen(./fras/1017.pdf): Failed to open stream: Too many open files in

Why don't you just close the files after concating with the main file?

My suggestion:

Combine the first 1000 files into one file.
Then the next 1000 files.
And so on.

After the these combinations, you can combine the 1000-combine-files into one extreme large file.

Consider Alternatives:

- Command-line tools: Tools like pdftk offer command-line PDF merging options that might be more efficient for large datasets.
- Third-party libraries: Explore dedicated PDF manipulation libraries like setasign/fpdi for PHP that offer optimized functionalities for merging PDFs.

Jolinar wrote: ↑Tue 21. May 2024, 14:52 Consider Alternatives:

- Command-line tools: Tools like pdftk offer command-line PDF merging options that might be more efficient for large datasets.
- Third-party libraries: Explore dedicated PDF manipulation libraries like setasign/fpdi for PHP that offer optimized functionalities for merging PDFs.

I use this library, but I didn't find an option to close the file after importing it

// set the source file
$pdf->setSourceFile($fichero);
// import page 1
$tplId = $pdf->importPage(1);

No matter how much I searched, I couldn't find the option to close the file after importing it.

Openfile -> append to main-file -> close file -> next pdf.

Looks to me you keep them open all the time.

Why don't you do the above? Then it doesn't matter how many files you have.