I have a php script that generates a pdf report. When we go to save the pdf document, the filename that Acrobat suggests is report_pdf, since the php script is named report_
Try:
header('Content-Disposition: attachment; filename="July Report.pdf"');
or
header('Content-Disposition: inline; filename="July Report.pdf"');
Another option would be to use the $_SERVER['PATH_INFO'] to pass your "July Report.pdf" - an example link might be:
That file should default to saving as "July Report.pdf" - and should behave exactly like your old php script did, just change the code that produces the link to the pdf.