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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 |
|---|---|
| 423 | |
| 424 | foreach ( $options as $option ) { |
| 425 | // "When trying to design a foolproof system, |
| 426 | // never underestimate the ingenuity of the fools :)" -- Dougal |
| 427 | if ( in_array( $option->option_name, array( 'siteurl', 'home', 'category_base', 'tag_base' ) ) ) |
| 428 | $option->option_value = untrailingslashit( $option->option_value ); |
| 429 | $value = maybe_unserialize( $option->option_value ); |
| 430 | $all_options->{$option->option_name} = apply_filters( 'pre_option_' . $option->option_name, $value ); |
| 431 | } |
| 432 | return apply_filters( 'all_options', $all_options ); |
| 433 | } |
| 434 | |
| 435 | /** |
| 436 | * Loads and caches all autoloaded options, if available or all options. |
| 437 | * |
| 438 | * This is different from get_alloptions(), in that this function will cache the |
| 439 | * options and will return the cached options when called again. |
| 440 | * |
| 441 | * @since 2.2.0 |