is_ssl(): bool

User Contributed Notes

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   Codex 9 years ago

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   With load balancers

   It won’t work for websites behind some load balancers, especially Network Solutions hosted websites. To bodgy up a fix, save this gist into the plugins folder and enable it. For details, read “WordPress is_ssl() doesn’t work behind some load balancers.”

   Websites behind load balancers or reverse proxies that support HTTP_X_FORWARDED_PROTO can be fixed by adding the following code to the wp-config.php file, above the require_once call:

   if (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')
       $_SERVER['HTTPS'] = 'on';

   • This advice is spot on IF your environment allows you to modify values in $_SERVER. Unfortunately that is not always true. For example in Azure App Services, I appear to be unable to alter $_SERVER. Since $_SERVER is the only variable that is used by is_ssl() , the only solution is a direct hack within is_ssl() to force it return true.

     Will Brownsberger 4 years ago
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   Nawawi Jamili 4 years ago

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   if behind web proxy/balancer, can use this function.

   function wpdocs_maybe_is_ssl() {
       // cloudflare
       if ( ! empty( $_SERVER['HTTP_CF_VISITOR'] ) ) {
           $cfo = json_decode( $_SERVER['HTTP_CF_VISITOR'] );
           if ( isset( $cfo->scheme ) && 'https' === $cfo->scheme ) {
               return true;
           }
       }
   
       // other proxy
       if ( ! empty( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) && 'https' === $_SERVER['HTTP_X_FORWARDED_PROTO'] ) {
           return true;
       }
   
       return function_exists( 'is_ssl' ) ? is_ssl() : false;
   }