Warning: array_key_exists() expects parameter 2 to be array

I’m not add the code, I just replaced it.

function tptn_parse_request( $wp ) {
   	global $wpdb, $tptn_settings;
    if ( empty( $wp ) ) {
    global $wp;
    }

	$table_name = $wpdb->base_prefix . "top_ten";
	$top_ten_daily = $wpdb->base_prefix . "top_ten_daily";
	$str = '';

	if ( array_key_exists( 'top_ten_id', $wp->query_vars ) && array_key_exists( 'activate_counter', $wp->query_vars ) && $wp->query_vars['top_ten_id'] != '' ) {

		$id = intval( $wp->query_vars['top_ten_id'] );
		$blog_id = intval( $wp->query_vars['top_ten_blog_id'] );
		$activate_counter = intval( $wp->query_vars['activate_counter'] );

		if ( $id > 0 ) {

			if ( ( 1 == $activate_counter ) || ( 11 == $activate_counter ) ) {

				$tt = $wpdb->query( $wpdb->prepare( "INSERT INTO {$table_name} (postnumber, cntaccess, blog_id) VALUES('%d', '1', '%d') ON DUPLICATE KEY UPDATE cntaccess= cntaccess+1 ", $id, $blog_id ) );

				$str .= ( FALSE === $tt ) ? 'tte' : 'tt' . $tt;
			}

			if ( ( 10 == $activate_counter ) || ( 11 == $activate_counter ) ) {

				$current_date = gmdate( 'Y-m-d H', current_time( 'timestamp', 0 ) );

				$ttd = $wpdb->query( $wpdb->prepare( "INSERT INTO {$top_ten_daily} (postnumber, cntaccess, dp_date, blog_id) VALUES('%d', '1', '%s', '%d' ) ON DUPLICATE KEY UPDATE cntaccess= cntaccess+1 ", $id, $current_date, $blog_id ) );

				$str .= ( FALSE === $ttd ) ? ' ttde' : ' ttd' . $ttd;
			}
		}
		Header( "content-type: application/x-javascript" );
		echo '<!-- ' . $str . ' -->';

		//stop anything else from loading as it is not needed.
		exit;

	} elseif ( array_key_exists( 'top_ten_id', $wp->query_vars ) && array_key_exists( 'view_counter', $wp->query_vars ) && $wp->query_vars['top_ten_id'] != '' ) {

		$id = intval( $wp->query_vars['top_ten_id'] );

		if ( $id > 0 ) {

			$output = get_tptn_post_count( $id );

			Header( "content-type: application/x-javascript" );
			echo 'document.write("' . $output . '")';

			//stop anything else from loading as it is not needed.
			exit;
		}

	} else {
		return;
	}
}
add_action( 'wp', 'tptn_parse_request' );

PHP Warning: array_key_exists() expects parameter 2 to be array, null given in /wp-content/plugins/top-10/top-10.php on line 234

PHP Warning: array_key_exists() expects parameter 2 to be array, null given in /wp-content/plugins/top-10/top-10.php on line 264

Hi,
It works for me, all the warning is gone and the plugin also tracks the posts.

thanks for your help.