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

Parameters

$concat_useragentstring

The user agent concatenated with ‘ — WordPress/’ and the WordPress version.

$useragentstring

The useragent.

$pingback_server_urlstring

The server URL being linked to.

$pagelinkedtostring

URL of page linked to.

$pagelinkedfromstring

URL of page linked from.

Source

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

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