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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 |
|---|---|
| 3182 | |
| 3183 | function get_site_option( $key, $default = false, $use_cache = true ) { |
| 3184 | // Allow plugins to short-circuit site options. |
| 3185 | $pre = apply_filters( 'pre_site_option_' . $key, false ); |
| 3186 | if ( false !== $pre ) |
| 3187 | return $pre; |
| 3188 | |
| 3189 | $value = get_option($key, $default); |
| 3190 | |
| 3191 | return apply_filters( 'site_option_' . $key, $value ); |
| 3192 | } |
| 3193 | |
| 3194 | // expects $key, $value not to be SQL escaped |
| 3195 | function add_site_option( $key, $value ) { |
| 3196 | $value = apply_filters( 'pre_add_site_option_' . $key, $value ); |
| 3197 | $result = add_option($key, $value); |
| 3198 | do_action( "add_site_option_{$key}", $key, $value ); |
| 3199 | return $result; |
| 3200 | } |