htaccess expire

Quelle: TipAndTricks Artikel
This sets the expiry date of the file 2 months into the future from the current time. The following values can be used to specify the time period:
  • years
  • months
  • weeks
  • days
  • hours
  • minutes
  • seconds

eg. ExpiresDefault "access plus 14 days"
To add expires header to the image, CSS, javascript files add the following to your .htaccess file

Expire Header

	<FilesMatch "\.(ico|jpg|jpeg|png|gif|js|css|swf)$">
	ExpiresDefault "access plus 2 hours"

Expire images header

	ExpiresActive On
	ExpiresDefault A0
	ExpiresByType image/gif A2592000
	ExpiresByType image/png A2592000
	ExpiresByType image/jpg A2592000
	ExpiresByType image/jpeg A2592000
	ExpiresByType image/ico A2592000
	ExpiresByType text/css A2592000
	ExpiresByType text/javascript A2592000
	A2592000 means 1 month in the future (60*60*24*30=2592000)

Keep in mind that when you use expires header the files are cached in the browser until it expires so do not use this on files that changes frequently. If you change/update a file that has a far future expiry (eg. CSS or javascript files) then you should rename that file and use the renamed version so the browser doesn't fetch the old file.

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