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May 20th, 2009

how to add expires header to images?

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How can i add expires header to images?
i used the following in css file and php respectively

PHP Syntax (Toggle Plain Text)
<?php
-----------CSS------------------------------------------------------
   ob_start ("ob_gzhandler");
   header ("content-type: text/css; charset: UTF-8");
   header ("cache-control: must-revalidate");
   $offset = 48 * 60 * 60;
   $expire = "expires: " . gmdate ("D, d M Y H:i:s", time() + $offset) . " GMT";
   header ($expire);
?>
----------PHP------------------------------------------------------
<?php
if (substr_count($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip'))
	ob_start("ob_gzhandler");
else
	ob_start();
header ("content-type: text/html; charset: UTF-8");
header ("cache-control: must-revalidate");
echo  $offset = 48 * 60 * 60;
$expire = "expires: " . gmdate ("D, d M Y H:i:s", time() + $offset) . " GMT";
header ($expire);
?>
<?php
-----------CSS------------------------------------------------------
   ob_start ("ob_gzhandler");
   header ("content-type: text/css; charset: UTF-8");
   header ("cache-control: must-revalidate");
   $offset = 48 * 60 * 60;
   $expire = "expires: " . gmdate ("D, d M Y H:i:s", time() + $offset) . " GMT";
   header ($expire);
?>
----------PHP------------------------------------------------------
<?php
if (substr_count($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip'))
	ob_start("ob_gzhandler");
else
	ob_start();
header ("content-type: text/html; charset: UTF-8");
header ("cache-control: must-revalidate");
echo  $offset = 48 * 60 * 60;
$expire = "expires: " . gmdate ("D, d M Y H:i:s", time() + $offset) . " GMT";
header ($expire);
?>

Both are working but it does not applies to the images used in css files. They need to be specified separately.
How?
This is my problem can any one help me please...
Also if u can please tell me how to specify Etags?

I also tried in another method using .htaccess

PHP Syntax (Toggle Plain Text)

<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/gif A2592000
ExpiresByType image/jpg A2592000
ExpiresByType image/png A2592000
ExpiresByType application/x-javascript A2592000
ExpiresByType text/css A2592000
ExpiresByType image/x-icon A2592000
</IfModule>

i think this is working but not working for icon files
i also don know what this means "A2592000"
how can i set my own time for as expire header?

Thanks in adavance.

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danishbacker

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May 21st, 2009

Re: how to add expires header to images?

Problem solved. The second method is working.
Using .htaccess

PHP Syntax (Toggle Plain Text)
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType text/html "access plus 2 days" 
ExpiresByType image/gif "access plus 60 days"
ExpiresByType image/jpg "access plus 60 days"
ExpiresByType image/png "access plus 60 days" 
ExpiresByType application/x-javascript "access plus 60 days"
ExpiresByType text/css "access plus 60 days"
ExpiresByType image/x-icon "access plus 360 days"
</IfModule>
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType text/html "access plus 2 days" 
ExpiresByType image/gif "access plus 60 days"
ExpiresByType image/jpg "access plus 60 days"
ExpiresByType image/png "access plus 60 days" 
ExpiresByType application/x-javascript "access plus 60 days"
ExpiresByType text/css "access plus 60 days"
ExpiresByType image/x-icon "access plus 360 days"
</IfModule>

Also i got the meaning of A2592000 = 720hours = 30days
the numbers after A is the time to expire time (in seconds)
ie A3600 is 1 hour

Thank you all.

danishbacker

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since Apr 2008

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Sep 24th, 2009

Re: how to add expires header to images?

Thanks a lot man!
I registered just to say THANKS to you!

Cheers!

Click to Expand / Collapse Quote originally posted by danishbacker ...

Problem solved. The second method is working.
Using .htaccess
PHP Syntax (Toggle Plain Text)
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType text/html "access plus 2 days" 
ExpiresByType image/gif "access plus 60 days"
ExpiresByType image/jpg "access plus 60 days"
ExpiresByType image/png "access plus 60 days" 
ExpiresByType application/x-javascript "access plus 60 days"
ExpiresByType text/css "access plus 60 days"
ExpiresByType image/x-icon "access plus 360 days"
</IfModule>
<IfModule mod_expires.c> ExpiresActive On ExpiresByType text/html "access plus 2 days" ExpiresByType image/gif "access plus 60 days" ExpiresByType image/jpg "access plus 60 days" ExpiresByType image/png "access plus 60 days" ExpiresByType application/x-javascript "access plus 60 days" ExpiresByType text/css "access plus 60 days" ExpiresByType image/x-icon "access plus 360 days" </IfModule>
Also i got the meaning of A2592000 = 720hours = 30days
the numbers after A is the time to expire time (in seconds)
ie A3600 is 1 hour

Thank you all.

bbrosg

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since Sep 2009

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