Filters a list of trackback URLs following sanitization.

The string returned here consists of a space or carriage return-delimited list of trackback URLs.

$urls_to_ping string

Sanitized space or carriage return separated URLs.

$to_ping string

Space or carriage return separated URLs before sanitization.

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

return apply_filters( 'sanitize_trackback_urls', $urls_to_ping, $to_ping );