Setting Proper Header for Caching in PHP

Question

I'm using php to output an image using readfile function. I've set the headers for this php file as below:

$expires = 60*60*7;
header('Pragma: public');
header('Expires: '. gmdate('D, d M Y H:i:s \G\M\T', time() + $expires));
header('Content-Type: image/jpeg');
header("Cache-Control: maxage=".$expires);

Both expire and Cache-Control headers are set, but each time i load the url, image gets downloaded. Is there any other header rule needed to enable caching?

SamT · Accepted Answer · 2013-09-23 18:01:07Z

1

Use the Content Disposition header:

header("Content-Disposition: inline;filename=something.jpg")

This tells the browser to display it inline (rather than the default attchment, which triggers the download). Attachments will download regardless of cache values.

answered Sep 23, 2013 at 18:01

SamT

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