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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 |
|---|---|
| 1303 | $first_name = ''; |
| 1304 | $first_name = apply_filters('pre_user_first_name', $first_name); |
| 1305 | |
| 1306 | if ( empty($last_name) ) |
| 1307 | $last_name = ''; |
| 1308 | $last_name = apply_filters('pre_user_last_name', $last_name); |
| 1309 | |
| 1310 | if ( empty($description) ) |
| 1311 | $description = ''; |
| 1312 | $description = apply_filters('pre_user_description', $description); |
| 1313 | |
| 1314 | if ( empty($rich_editing) ) |
| 1315 | $rich_editing = 'true'; |
| 1316 | |
| 1317 | if ( empty($comment_shortcuts) ) |
| 1318 | $comment_shortcuts = 'false'; |
| 1319 | |
| 1320 | if ( empty($admin_color) ) |
| 1321 | $admin_color = 'fresh'; |