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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 |
|---|---|
| 308 | $link_url = apply_filters('pre_link_url', $link_url); |
| 309 | |
| 310 | if ( empty($link_rating) ) |
| 311 | $link_rating = 0; |
| 312 | else |
| 313 | $link_rating = (int) $link_rating; |
| 314 | |
| 315 | if ( empty($link_image) ) |
| 316 | $link_image = ''; |
| 317 | $link_image = apply_filters('pre_link_image', $link_image); |
| 318 | |
| 319 | if ( empty($link_target) ) |
| 320 | $link_target = ''; |
| 321 | $link_target = apply_filters('pre_link_target', $link_target); |
| 322 | |
| 323 | if ( empty($link_visible) ) |
| 324 | $link_visible = 'Y'; |
| 325 | $link_visibile = preg_replace('/[^YNyn]/', '', $link_visible); |
| 326 | |