install_search_form( bool $deprecated = true )
Displays a search form for searching plugins.
Parameters
- $deprecated
-  (bool) (Optional) Not used. Default value: true 
Source
File: wp-admin/includes/plugin-install.php
function install_search_form( $deprecated = true ) {
	$type = isset( $_REQUEST['type'] ) ? wp_unslash( $_REQUEST['type'] ) : 'term';
	$term = isset( $_REQUEST['s'] ) ? wp_unslash( $_REQUEST['s'] ) : '';
	?>
	<form class="search-form search-plugins" method="get">
		<input type="hidden" name="tab" value="search" />
		<label class="screen-reader-text" for="typeselector"><?php _e( 'Search plugins by:' ); ?></label>
		<select name="type" id="typeselector">
			<option value="term"<?php selected( 'term', $type ); ?>><?php _e( 'Keyword' ); ?></option>
			<option value="author"<?php selected( 'author', $type ); ?>><?php _e( 'Author' ); ?></option>
			<option value="tag"<?php selected( 'tag', $type ); ?>><?php _ex( 'Tag', 'Plugin Installer' ); ?></option>
		</select>
		<label class="screen-reader-text" for="search-plugins"><?php _e( 'Search Plugins' ); ?></label>
		<input type="search" name="s" id="search-plugins" value="<?php echo esc_attr( $term ); ?>" class="wp-filter-search" placeholder="<?php esc_attr_e( 'Search plugins...' ); ?>" />
		<?php submit_button( __( 'Search Plugins' ), 'hide-if-js', false, false, array( 'id' => 'search-submit' ) ); ?>
	</form>
	<?php
}  Changelog
| Version | Description | 
|---|---|
| 4.6.0 | The $type_selectorparameter was deprecated. | 
| 2.7.0 | Introduced. | 
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Licensed under the GNU GPLv2+ License.
    https://developer.wordpress.org/reference/functions/install_search_form