我需要帮助在PHP文件中实现一个Javascript代码，用一个新的搜索框替换默认的搜索框。我必须使用echo吗？看起来怎么样？提前谢谢你的帮助，我已经试了好几个小时了。
$(function () {
$(\'a[href="#search"]\').on(\'click\', function(event) {
event.preventDefault();
$(\'#search\').addClass(\'open\');
$(\'#search > form > input[type="search"]\').focus();
});
$(\'#search, #search button.close\').on(\'click keyup\', function(event) {
if (event.target == this || event.target.className == \'close\' || event.keyCode == 27) {
$(this).removeClass(\'open\');
}
});
实现此PHP：
<?php
//Header File
if ( ! defined( \'ABSPATH\' ) ) exit;
?>
<!DOCTYPE html>
<html <?php language_attributes(); ?>>
<head>
<meta charset="<?php bloginfo( \'charset\' ); ?>">
<?php
wp_head();
?>
</head>
<body <?php body_class(); ?>>
<div id="global" class="global">
<div class="pagesidebar">
<div class="sidebarcontent">
<h2 id="sidelogo">
<a href="<?php echo vibe_site_url(); ?>"><img src="<?php echo apply_filters(\'wplms_logo_url\',VIBE_URL.\'/assets/images/logo.png\',\'pagesidebar\'); ?>" alt="<?php echo get_bloginfo(\'name\'); ?>" /></a>
</h2>
<?php
$args = apply_filters(\'wplms-mobile-menu\',array(
\'theme_location\' => \'mobile-menu\',
\'container\' => \'\',
\'menu_class\' => \'sidemenu\',
\'fallback_cb\' => \'vibe_set_menu\',
));
wp_nav_menu( $args );
?>
</div>
<a class="sidebarclose"><span></span></a>
</div>
<div class="pusher">
<?php
$fix=vibe_get_option(\'header_fix\');
?>
<header class="sleek transparent <?php if(isset($fix) && $fix){echo \'fix\';} ?>">
<div class="<?php echo vibe_get_container(); ?>">
<div id="searchdiv">
<form role="search" method="get" id="searchform" action="<?php echo home_url( \'/\' ); ?>">
<div><label class="screen-reader-text" for="s">Search for:</label>
<input type="text" value="<?php the_search_query(); ?>" name="s" id="s" placeholder="<?php _e(\'Hit enter to search...\',\'vibe\'); ?>" />
<?php
$course_search=vibe_get_option(\'course_search\');
if(isset($course_search) && $course_search)
echo \'<input type="hidden" value="course" name="post_type" />\';
?>
<input type="submit" id="searchsubmit" value="Search" />
</div>
</form>
</div>
<div class="row">
<div class="col-md-12 col-sm-12 col-xs-12">
<?php
if(is_home()){
echo \'<h1 id="logo">\';
}else{
echo \'<h2 id="logo">\';
}
?>
<a href="<?php echo vibe_site_url(); ?>"><img src="<?php echo apply_filters(\'wplms_logo_url\',VIBE_URL.\'/assets/images/logo.png\',\'header\'); ?>" alt="<?php echo get_bloginfo(\'name\'); ?>" /></a>
<?php
if(is_home()){
echo \'</h1>\';
}else{
echo \'</h2>\';
}
$args = apply_filters(\'wplms-main-menu\',array(
\'theme_location\' => \'main-menu\',
\'container\' => \'nav\',
\'menu_class\' => \'menu\',
\'walker\' => new vibe_walker,
\'fallback_cb\' => \'vibe_set_menu\'
));
?>
<?php
if ( function_exists(\'bp_loggedin_user_link\') && is_user_logged_in() ) :
?>
<ul class="topmenu">
<li><a href="<?php bp_loggedin_user_link(); ?>" class="smallimg vbplogin"><?php $n=vbp_current_user_notification_count(); echo ((isset($n) && $n)?\'<em></em>\':\'\'); bp_loggedin_user_avatar( \'type=full\' ); ?><span><?php bp_loggedin_user_fullname(); ?></span></a></li>
<?php do_action(\'wplms_header_top_login\'); ?>
<?php
if ( in_array( \'woocommerce/woocommerce.php\', apply_filters( \'active_plugins\', get_option( \'active_plugins\' ) ) ) || (function_exists(\'is_plugin_active_for_network\') && is_plugin_active_for_network( \'woocommerce/woocommerce.php\'))) { global $woocommerce;
?>
<li><a class="smallimg vbpcart"><span class="fa fa-shopping-cart"><?php echo (($woocommerce->cart->cart_contents_count)?\'<em>\'.$woocommerce->cart->cart_contents_count.\'</em>\':\'\'); ?></span></a>
<div class="woocart"><?php woocommerce_mini_cart(); ?></div>
<div id="searchicon"><i class="icon-search-2"></i></div>
</li>
<?php
}
?>
</ul>
<?php wp_nav_menu( $args ); ?>
<?php
else :
?>
<ul class="topmenu">
<li><a href="#login" class="smallimg vbplogin"><span><?php _e(\'LOGIN\',\'vibe\'); ?></span></a></li>
<?php
if ( in_array( \'woocommerce/woocommerce.php\', apply_filters( \'active_plugins\', get_option( \'active_plugins\' ) ) ) || (function_exists(\'is_plugin_active_for_network\') && is_plugin_active_for_network( \'woocommerce/woocommerce.php\'))) { global $woocommerce;
?>
<li><a class="smallimg vbpcart"><span class="fa fa-shopping-cart"><?php echo (($woocommerce->cart->cart_contents_count)?\'<em>\'.$woocommerce->cart->cart_contents_count.\'</em>\':\'\'); ?></span></a>
<div class="woocart"><?php woocommerce_mini_cart(); ?></div>
<div id="searchicon"><i class="icon-search-2"></i></div>
</li>
<?php
}
?>
</ul>
<?php wp_nav_menu( $args ); ?>
<?php
endif;
?>
<?php
$style = vibe_get_login_style();
if(empty($style)){
$style=\'default_login\';
}
?>
<div id="vibe_bp_login" class="<?php echo $style; ?>">
<?php
vibe_include_template("login/$style.php");
?>
</div>
</div>
<a id="trigger">
<span class="lines"></span>
</a>
</div>
</header>
