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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 |
|---|---|
| 216 | * |
| 217 | * @since 1.5.0 As 'option_' . $setting |
| 218 | * @since 3.0.0 |
| 219 | * @since 4.4.0 The `$option` parameter was added. |
| 220 | * |
| 221 | * @param mixed $value Value of the option. If stored serialized, it will be |
| 222 | * unserialized prior to being returned. |
| 223 | * @param string $option Option name. |
| 224 | */ |
| 225 | return apply_filters( "option_{$option}", maybe_unserialize( $value ), $option ); |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * Protects WordPress special option from being modified. |
| 230 | * |
| 231 | * Will die if $option is in protected list. Protected options are 'alloptions' |
| 232 | * and 'notoptions' options. |
| 233 | * |
| 234 | * @since 2.2.0 |