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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 |
|---|---|
| 192 | |
| 193 | /** |
| 194 | * Filters the HTML format of the search form. |
| 195 | * |
| 196 | * @since 3.6.0 |
| 197 | * |
| 198 | * @param string $format The type of markup to use in the search form. |
| 199 | * Accepts 'html5', 'xhtml'. |
| 200 | */ |
| 201 | $format = apply_filters( 'search_form_format', $format ); |
| 202 | |
| 203 | $search_form_template = locate_template( 'searchform.php' ); |
| 204 | if ( '' != $search_form_template ) { |
| 205 | ob_start(); |
| 206 | require( $search_form_template ); |
| 207 | $form = ob_get_clean(); |
| 208 | } else { |
| 209 | if ( 'html5' == $format ) { |
| 210 | $form = '<form role="search" method="get" class="search-form" action="' . esc_url( home_url( '/' ) ) . '"> |