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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 325 | $link_visibile = preg_replace('/[^YNyn]/', '', $link_visible); |
| 326 | |
| 327 | if ( empty($link_owner) ) |
| 328 | $link_owner = $current_user->id; |
| 329 | else |
| 330 | $link_owner = (int) $link_owner; |
| 331 | |
| 332 | if ( empty($link_notes) ) |
| 333 | $link_notes = ''; |
| 334 | $link_notes = apply_filters('pre_link_notes', $link_notes); |
| 335 | |
| 336 | if ( empty($link_description) ) |
| 337 | $link_description = ''; |
| 338 | $link_description = apply_filters('pre_link_description', $link_description); |
| 339 | |
| 340 | if ( empty($link_rss) ) |
| 341 | $link_rss = ''; |
| 342 | $link_rss = apply_filters('pre_link_rss', $link_rss); |
| 343 | |