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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 |
|---|---|
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * Filters all options after retrieving them. |
| 222 | * |
| 223 | * @since 4.9.0 |
| 224 | * |
| 225 | * @param array $alloptions Array with all options. |
| 226 | */ |
| 227 | return apply_filters( 'alloptions', $alloptions ); |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Loads and caches certain often requested site options if is_multisite() and a persistent cache is not being used. |
| 232 | * |
| 233 | * @since 3.0.0 |
| 234 | * |
| 235 | * @global wpdb $wpdb WordPress database abstraction object. |
| 236 | * |