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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 |
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154 | * If set to 'html5', it changes to search input type and adds placeholder text. |
155 | * |
156 | * @param boolean $echo Default to echo and not return the form. |
157 | * @return string|null String when retrieving, null when displaying or if searchform.php exists. |
158 | */ |
159 | function get_search_form( $echo = true ) { |
160 | do_action( 'pre_get_search_form' ); |
161 |
|
162 | $format = current_theme_supports( 'html5', 'search-form' ) ? 'html5' : 'xhtml'; |
163 | $format = apply_filters( 'search_form_format', $format ); |
164 |
|
165 | $search_form_template = locate_template( 'searchform.php' ); |
166 | if ( '' != $search_form_template ) { |
167 | ob_start(); |
168 | require( $search_form_template ); |
169 | $form = ob_get_clean(); |
170 | } else { |
171 | if ( 'html5' == $format ) { |
172 | $form = '<form role="search" method="get" class="search-form" action="' . esc_url( home_url( '/' ) ) . '"> |