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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 |
|---|---|
| 770 | $value = $row->meta_value; |
| 771 | $value = maybe_unserialize( $value ); |
| 772 | wp_cache_set( $cache_key, $value, 'site-options' ); |
| 773 | } else { |
| 774 | $value = apply_filters( 'default_site_option_' . $option, $default ); |
| 775 | } |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | return apply_filters( 'site_option_' . $option, $value ); |
| 780 | } |
| 781 | |
| 782 | /** |
| 783 | * Add a new site option. |
| 784 | * |
| 785 | * Existing options will not be updated. Note that prior to 3.3 this wasn't the case. |
| 786 | * |
| 787 | * @see add_option() |
| 788 | * @package WordPress |