其实采用Cookies可以记录用户在网站的搜索记录，我们需要记录并输出用户的搜索记录，并添加一个清空搜索历史功能，如何通过Cookie记录来查看WordPress网站的用户搜索历史？
将用户搜索记录写入 Cookie
/**
* 通过Cookie记录用户搜索记录
*/
function wpkj_set_recently_searches(){
//仅在前端搜索页面执行
if ( is_search() && !is_admin() ) {
$search_term = get_search_query();
if( $search_term ) $search_term = trim( $search_term );
//如果搜索字段不存在或为空，不继续
if( !$search_term || $search_term === \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’) return;
//检查并设置搜索历史数组
$recently_searches = array();
if(isset($_COOKIE[\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wpkj_recently_searches\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’])) {
$recently_searches = explode(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, $_COOKIE[\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wpkj_recently_searches\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’], 20);
}
if(!in_array( $search_term, $recently_searches)){
$recently_searches[] = $search_term;
}
//设置cookie为30天
setcookie(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wpkj_recently_searches\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, implode(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, $recently_searches), current_time(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’timestamp\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’) + (86400*30), \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”/\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”);
}
}
add_action( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wp\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wpkj_set_recently_searches\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, 20 );
在上面的代码中，我们封装了一个 wpkj_set_recently_searches 函数，然后将该函数挂载到 wp 钩子中执行。
获取并输出用户的搜索记录
/**
* 获取用户最近搜索记录
*/
function wpkj_get_recently_searches( $limit = 10, $title = false ){
$recently_searches = array();
if(isset($_COOKIE[\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wpkj_recently_searches\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’])) {
$recently_searches = explode(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, $_COOKIE[\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wpkj_recently_searches\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’]);
//将搜索记录倒序
$recently_searches = array_reverse($recently_searches);
if( !emptyempty($recently_searches) ) {
$HTML = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'<div class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”recently-searches\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
if( $title ) $html .= \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'<h2 class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”searches-title recently-searches-title\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’. htmlspecialchars($title) .\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'</h2>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
$html .= \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'<ul class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”recently-searches-ul\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
$home_url_slash = get_option(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’home\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’) . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’/\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
$i = 1;
foreach( $recently_searches as $result ) {
$html .= \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'<li class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”search-item\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”><a href=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’. $home_url_slash . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’?s=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ . $result . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’. htmlspecialchars($result) .\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'</a></li>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
$i++;
}
$html .= \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'</ul>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
$html .= \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'<div class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”recently-searches-del\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’.__( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’Clear search history\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, THEME_SLUG ).\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'</div>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
$html .= \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'</div>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
return $html;
}
}
}
wpkj_get_recently_searches 函数有两个参数，第一个为调用的个数，第二个为标题。然后我们可以在需要输出搜索记录的地方，使用下面的代码即可：
if(function_exists(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wpkj_get_recently_searches\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’)) {
echo wpkj_get_recently_searches( 10, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’搜索历史\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’);
}
清空当前用户搜索历史
这里通过 js 方式实现：
//添加一个js函数用于删除cookie
function delCookie(name) {
var exp = new Date();
exp.setTime(exp.getTime() – 1);
var cval = getCookie(name);
if (cval != null) document.cookie = name + \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” + cval + \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”;expires=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” + exp.toGMTString();
}
//很抱歉，这里采用的是jquery操作
jQuery(document).ready(function($) {
$(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”.recently-searches-del\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”).on(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”click\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”, function() {
//删除cookie
delCookie(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”wpkj_recently_searches\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”);
//隐去搜索历史部分的内容
$(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”.recently-searches\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”).fadeOut();
});
});
你可以将上面的 js 代码添加到一个 js 文件中，比如命名为 recently-searches.js，然后可以通过下面的代码引入：
//引入搜索历史js
function wpkj_recently_searches_scripts() {
wp_enqueue_script( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’recently_searches\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, get_template_directory_uri() . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’https://img.2kss.com/assets/js/recently-searches.js\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, array( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’jquery\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ), \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, true );
}
add_action( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wp_enqueue_scripts\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wpkj_recently_searches_scripts\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ );
请注意下 js 文件的路径，上面的代码表示我将 recently-searches.js 放在了当前主题的 /assets/js 目录下，你需要根据自己的实际修改这个路径。到这里就 OK 了。