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Source View: http_headers_useragent

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Line Code
6755                return $this->pingback_error( 48, __( 'The pingback has already been registered.' ) );
6756           }
6757
6758           // very stupid, but gives time to the 'from' server to publish !
6759           sleep( 1 );
6760
6761           $remote_ip = preg_replace( '/[^0-9a-fA-F:., ]/', '', $_SERVER['REMOTE_ADDR'] );
6762
6763           /** This filter is documented in wp-includes/class-http.php */
6764           $user_agent = apply_filters( 'http_headers_useragent', 'WordPress/' . get_bloginfo( 'version' ) . '; ' . get_bloginfo( 'url' ), $url );
6765
6766           // Let's check the remote site
6767           $http_api_args = array(
6768                'timeout'             => 10,
6769                'redirection'         => 0,
6770                'limit_response_size' => 153600, // 150 KB
6771                'user-agent'          => "$user_agent; verifying pingback from $remote_ip",
6772                'headers'             => array(
6773                     'X-Pingback-Forwarded-For' => $remote_ip,