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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 |
|---|---|
| 380 | } |
| 381 | |
| 382 | // If home is not set use siteurl. |
| 383 | if ( 'home' == $option && '' == $value ) |
| 384 | return get_option( 'siteurl' ); |
| 385 | |
| 386 | if ( in_array( $option, array('siteurl', 'home', 'category_base', 'tag_base') ) ) |
| 387 | $value = untrailingslashit( $value ); |
| 388 | |
| 389 | return apply_filters( 'option_' . $option, maybe_unserialize( $value ) ); |
| 390 | } |
| 391 | |
| 392 | /** |
| 393 | * Protect WordPress special option from being modified. |
| 394 | * |
| 395 | * Will die if $option is in protected list. Protected options are 'alloptions' |
| 396 | * and 'notoptions' options. |
| 397 | * |
| 398 | * @since 2.2.0 |