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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 |
|---|---|
| 4320 | */ |
| 4321 | function the_search_query() { |
| 4322 | /** |
| 4323 | * Filters the contents of the search query variable for display. |
| 4324 | * |
| 4325 | * @since 2.3.0 |
| 4326 | * |
| 4327 | * @param mixed $search Contents of the search query variable. |
| 4328 | */ |
| 4329 | echo esc_attr( apply_filters( 'the_search_query', get_search_query( false ) ) ); |
| 4330 | } |
| 4331 | |
| 4332 | /** |
| 4333 | * Gets the language attributes for the 'html' tag. |
| 4334 | * |
| 4335 | * Builds up a set of HTML attributes containing the text direction and language |
| 4336 | * information for the page. |
| 4337 | * |
| 4338 | * @since 4.3.0 |