PHP fwrite（）块到一个大文件/ 504网关超时

Question

I'm working on an upload tool to upload large files (1GB - 4GB) to a FTP server. I used HTML5 to slice the uploaded file into 1MB chunks and then upload each of those chunks to a temp folder. As soon as every chunk is uploaded a PHP script creates the file out of those chunks:

if (($fp = fopen(UPLOAD_DIR.$fileName, 'w')) !== false) {
    for ($i = 1; $i <= $totalFiles; $i++) {
        fwrite($fp, file_get_contents($tempDir.'/'.$fileName.'.part'.$i));               
    }
    fclose($fp);        
}

Everything works for smaller file sizes (tested with files around 1GB - 1.5GB), but as soon as i upload very large files (eg 3GB) my PHP script stops with a 504 Gateway timeout. The 'max_execution_time' in my php.ini is set to 90. Is there any way to avoid the 504 timeout in this case or a way to speed up the script, which creates the file? I could try to change 'max_execution_time', but that doesn't seem to be the perfect solution. Any suggestions?

EDIT: The script is running on a Linux System

Answer 1

I don't know what operating system your server is running, but if it is linux, you could try it directly from the command line using for example exec .

Something like:

exec('cat ' . $tempDir . '/' . $fileName . '.part* > ' . UPLOAD_DIR . $fileName);

You might need to use escapeshellcmd() on your variables if you don't control them.

You can also generate a list of partial file names in a loop if .part* does not give you the correct order.