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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 |
|---|---|
| 643 | * Filters a blog option value. |
| 644 | * |
| 645 | * The dynamic portion of the hook name, `$option`, refers to the blog option name. |
| 646 | * |
| 647 | * @since 3.5.0 |
| 648 | * |
| 649 | * @param string $value The option value. |
| 650 | * @param int $id Blog ID. |
| 651 | */ |
| 652 | return apply_filters( "blog_option_{$option}", $value, $id ); |
| 653 | } |
| 654 | |
| 655 | /** |
| 656 | * Add a new option for a given blog id. |
| 657 | * |
| 658 | * You do not need to serialize values. If the value needs to be serialized, then |
| 659 | * it will be serialized before it is inserted into the database. Remember, |
| 660 | * resources can not be serialized or added as an option. |
| 661 | * |