Example of forcibly downloading a PDF file using PHP

When you need to download a PDF file, if it is not processed, it will open the PDF file directly in the browser, and then you need to save it as a file to save the download, below we can use PHP to directly download PDF files. sometimes we encounter such a situation. when we need to download a PDF file, if it is not processed, it will open the PDF file directly in the browser, then you need to save the downloaded file by saving it as a file. This article uses PHP to directly download PDF files.

Implementation principle: we only need to modify the HTTP header of the page and set Content-Type to force-download to solve the problem.

See the code:
The code is as follows:
ForceDownload ("includemodownload ");
Function forceDownload ($ filename ){

If (false = file_exists ($ filename )){
Return false;
}

// Http headers
Header ('content-Type: application-x/force-download ');
Header ('content-Disposition: attachment; filename = "'. basename ($ filename ).'"');
Header ('content-length: '. filesize ($ filename ));

// For IE6
If (false === strpos ($ _ SERVER ['http _ USER_AGENT '], 'msie 6 ')){
Header ('cache-Control: no-Cache, must-revalidate ');
}
Header ('pragma: no-cache ');

// Read file content and output
Return readfile ($ filename );;
}

For convenience, I wrote a function forceDownload () and then called it.