Custom Genesis Search Form, replace input with button

search.php

<?php

/**
 * You can find the source function for the genesis search form
 * within the Genesis theme under > /lib/strucutre/search.php
 *
 * This updated search from has replaced the <input type="button">
 * with a <button> element. This makes it easier to add an icon
 * in replacement of the text with the approtraite attribute roles
 * that doesn't cause an html validation error.
 *
 * This version of the search from assumes you have declared supprot for html
 * and acessability supprot.
 * This update removes the filters for the button, label and search text
 * as they are redundent.
 */


// Replace the default genesis search form
add_filter( 'get_search_form', 'pb_custom_search_form', 10, 4 );
function pb_custom_search_form() {

	$onfocus = "if ('" . esc_js( $search_text ) . "' === this.value) {this.value = '';}";
	$onblur  = "if ('' === this.value) {this.value = '" . esc_js( $search_text ) . "';}";

	$value_or_placeholder = ( get_search_query() == '' ) ? 'placeholder' : 'value';

	$form  = sprintf( '<form %s>', genesis_attr( 'search-form' ) );

	$form_id = uniqid( 'searchform-', true );

	$form .= sprintf(
		'<meta itemprop="target" content="%s"/><label class="search-form-label screen-reader-text" for="%s">%s</label><input itemprop="query-input" type="search" name="s" id="%s" %s="%s" /><button class="search-button" type="submit">%s</button></form>',
		home_url( '/?s={s}' ),
		esc_attr( $form_id ),
		esc_html( 'Search this website', 'genesis' ),
		esc_attr( $form_id ),
		$value_or_placeholder,
		esc_attr( 'Search...', 'genesis' ),
		esc_attr( 'Search', 'genesis' )
	);

	return apply_filters( 'genesis_search_form', $form );

}