Write pdf directly to the server

I'm trying to write the pdf file directly to a directory on the server, without creating the pdf file to be downloaded to my local machine. The file name as a link so that it can be viewed immediately or have the link emailed.

Is it some version of this:

$out_file = fopen("document.pdf", "wb");
$client->convertURI('$url, $out_file);
fclose($out_file);

I'm not familiar enough with PHP to completely understand "fopen" and "fwrite" commands.

Thank you.

You code looks correct to me. I would only suggest to use a full path to the destination directory on your server, eg

$out_file = fopen("/full/path/to/document.pdf", "wb"); 

fopen() creates a new file on your server, convertURI() writes PDF to that file, and fclose() closes the file.