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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 |
|---|---|
| 242 | * |
| 243 | * @since 2.7.0 as 'get_search_form' action. |
| 244 | * @since 3.6.0 |
| 245 | * @since 5.5.0 The `$args` parameter was added. |
| 246 | * |
| 247 | * @link https://core.trac.wordpress.org/ticket/19321 |
| 248 | * |
| 249 | * @param array $args The array of arguments for building the search form. |
| 250 | */ |
| 251 | do_action( 'pre_get_search_form', $args ); |
| 252 | |
| 253 | $echo = true; |
| 254 | |
| 255 | if ( ! is_array( $args ) ) { |
| 256 | /* |
| 257 | * Back compat: to ensure previous uses of get_search_form() continue to |
| 258 | * function as expected, we handle a value for the boolean $echo param removed |
| 259 | * in 5.2.0. Then we deal with the $args array and cast its defaults. |
| 260 | */ |