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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 |
|---|---|
| 238 | * |
| 239 | * @since 1.5.0 As 'option_' . $setting |
| 240 | * @since 3.0.0 |
| 241 | * @since 4.4.0 The `$option` parameter was added. |
| 242 | * |
| 243 | * @param mixed $value Value of the option. If stored serialized, it will be |
| 244 | * unserialized prior to being returned. |
| 245 | * @param string $option Option name. |
| 246 | */ |
| 247 | return apply_filters( "option_{$option}", maybe_unserialize( $value ), $option ); |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * Primes specific options into the cache with a single database query. |
| 252 | * |
| 253 | * Only options that do not already exist in cache will be loaded. |
| 254 | * |
| 255 | * @since 6.4.0 |
| 256 | * |