Support » Plugin: W3 Total Cache » Empty Vary HTTP header

  • An empty Vary header may be added in PgCache.php at line 1243. I’ve done the following to remove it:

    diff --git a/wp-content/plugins/w3-total-cache/lib/W3/PgCache.php b/wp-content/plugins/w3-total-cache/lib/W3/PgCache.php
    index 26f471c..432b6ac 100644
    --- a/wp-content/plugins/w3-total-cache/lib/W3/PgCache.php
    +++ b/wp-content/plugins/w3-total-cache/lib/W3/PgCache.php
    @@ -1239,8 +1239,10 @@ class W3_PgCache {
             /**
              * Add vary header
              */
    -        $headers = array_merge($headers, array(
    -            'Vary' => $vary));
    +        if ( $vary ) {
    +            $headers = array_merge($headers, array(
    +                'Vary' => $vary));
    +        }
    
             /**
              * Add custom headers

    https://wordpress.org/plugins/w3-total-cache/

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