Je was op zoek naar: user defined signature creation (Japans - Engels)

タブuser can set an user defined delimiter
tab

赤外線user-defined connection
infrared

検索インデックスを作成(i)...label for searching documentation using custom (user defined) scope
build search & index...

class php_user_filter is predefined and is an abstract baseclass for use with user defined filters. see the manual page for stream_register_filter() for details on implementing user defined filters.
as with most php internal functions if a failure occours an e_warning message will be generated describing the nature of the error.