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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 |
|---|---|
| 265 | $key = str_replace('-', '', $option); |
| 266 | |
| 267 | if ( isset( $user->{$wpdb->prefix . $key} ) ) // Blog specific |
| 268 | $result = $user->{$wpdb->prefix . $key}; |
| 269 | elseif ( isset( $user->{$key} ) ) // User specific and cross-blog |
| 270 | $result = $user->{$key}; |
| 271 | else |
| 272 | $result = false; |
| 273 | |
| 274 | return apply_filters("get_user_option_{$option}", $result, $option, $user); |
| 275 | } |
| 276 | |
| 277 | /** |
| 278 | * Update user option with global blog capability. |
| 279 | * |
| 280 | * User options are just like user metadata except that they have support for |
| 281 | * global blog options. If the 'global' parameter is false, which it is by default |
| 282 | * it will prepend the WordPress table prefix to the option name. |
| 283 | * |