wordpress屏蔽恶意关键词搜索

add_action('admin_init', 'php_search_ban_key');
function php_search_ban_key() {
    add_settings_field('php_search_key', '搜索关键词屏蔽', 'php_search_key_callback_function', 'reading');
    register_setting('reading','php_search_key');
}
 
function php_search_key_callback_function() {
    echo '<textarea name="php_search_key" rows="10" cols="50" id="php_search_key" class="large-text code">' .
     
    get_option('php_search_key') . '</textarea>';
}
add_action('template_redirect', 'php_search_ban');
function php_search_ban(){
if (is_search()) {
    global $wp_query;
    $php_search_key = get_option('php_search_key');
        if($php_search_key){
        $php_search_key = str_replace("\r\n", "|", $php_search_key);
        $BanKey = explode('|', $php_search_key);
        $S_Key = $wp_query->query_vars;
            foreach($BanKey as $Key){
                if( stristr($S_Key['s'],$Key) != false ){
                wp_die('请不要搜索非法关键字');
                }
            }
        }
    }
}