Filters the user agent sent when pinging-back a URL.

$concat_useragent string

The user agent concatenated with ' -- WordPress/' and the WordPress version.

$useragent string

The useragent.

$pingback_server_url string

The server URL being linked to.

$pagelinkedto string

URL of page linked to.

$pagelinkedfrom string

URL of page linked from.

File: wp-includes/comment.php. View all references

$client->useragent = apply_filters( 'pingback_useragent', $client->useragent . ' -- WordPress/' . get_bloginfo( 'version' ), $client->useragent, $pingback_server_url, $pagelinkedto, $pagelinkedfrom );