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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 |
---|---|
216 |
|
217 | /** |
218 | * Filter the HTML format of the search form. |
219 | * |
220 | * @since 3.6.0 |
221 | * |
222 | * @param string $format The type of markup to use in the search form. |
223 | * Accepts 'html5', 'xhtml'. |
224 | */ |
225 | $format = apply_filters( 'search_form_format', $format ); |
226 |
|
227 | $search_form_template = locate_template( 'searchform.php' ); |
228 | if ( '' != $search_form_template ) { |
229 | ob_start(); |
230 | require( $search_form_template ); |
231 | $form = ob_get_clean(); |
232 | } else { |
233 | if ( 'html5' == $format ) { |
234 | $form = '<form role="search" method="get" class="search-form" action="' . esc_url( home_url( '/' ) ) . '"> |