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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 |
|---|---|
| 302 | $update = false; |
| 303 | |
| 304 | if ( !empty($link_id) ) |
| 305 | $update = true; |
| 306 | |
| 307 | $link_id = (int) $link_id; |
| 308 | |
| 309 | if( trim( $link_name ) == '' ) |
| 310 | return 0; |
| 311 | $link_name = apply_filters('pre_link_name', $link_name); |
| 312 | |
| 313 | if( trim( $link_url ) == '' ) |
| 314 | return 0; |
| 315 | $link_url = apply_filters('pre_link_url', $link_url); |
| 316 | |
| 317 | if ( empty($link_rating) ) |
| 318 | $link_rating = 0; |
| 319 | else |
| 320 | $link_rating = (int) $link_rating; |