Joomla Performance: Specify a Cache Validator
07 Nov 2017 02:25 - 21 Aug 2026 23:56 #4889
by Trony
If You test your Website with a tools like GTmetrix , You could find a suggestion like Specify a cache validator:
First Step
Check in your htaccess if You have these rules:
I suggest to comment with # and put FileETag MTime Size:
Second Step
Sometimes Joomla did not ETag header and so, You Edit index.php of Your Template and You put at top this PHP's Code:
I prefer to use Weak ETag Validation instead Strong.
You can read more here: Strong and Weak validation
Conclusions
You can to use only Last Modified Header but ETag is more Compatible with some Browsers and Bots (Bing for Example).
Joomla Performance: Specify a Cache Validator was created by Trony
If You test your Website with a tools like GTmetrix , You could find a suggestion like Specify a cache validator:
The following resources are missing a cache validator. Resources that do not specify a cache validator cannot be refreshed efficiently. Specify a Last-Modified or ETag header to enable cache validation for the following resources
First Step
Check in your htaccess if You have these rules:
Code:
FileETag None
Header unset ETag
Header unset Last-Modified
I suggest to comment with # and put FileETag MTime Size:
Code:
FileETag MTime Size
#FileETag None
#Header unset ETag
#Header unset Last-Modified
Second Step
Sometimes Joomla did not ETag header and so, You Edit index.php of Your Template and You put at top this PHP's Code:
Code:
<?php
$etagFuso= md5_file($_SERVER['SCRIPT_FILENAME']);
header('ETag: '. 'W/"'.$etagFuso.'"', true );
?>
You can read more here: Strong and Weak validation
Conclusions
You can to use only Last Modified Header but ETag is more Compatible with some Browsers and Bots (Bing for Example).
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