给Wordpress自带的搜索添加一个验证码-防止Wordpress搜索给服务器造成负载过高和避免恶意搜索

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WordPress自带的搜索功能有两个问题:一个就是搜索过多会造成Wordpress服务器数据库查询压力过大,从而给服务器带来过大的负载压力;第二个就是有坏人会利用Wordpress搜索功能进行恶意搜索,会造成搜索引擎收录搜索结果。

解决这两个问题一个最好的办法就是给Wordpress自带的搜索加一个验证码,阻止那些机器搜索行为:

function esc_search_captcha( $query, $error = true ) {
      if ( is_search() && !is_admin() ) {
        if ( ! isset( $_COOKIE['esc_search_captcha'] ) ) {
          $query->is_search = false;
          $query->query_vars['s'] = false;
          $query->query['s'] = false;
                if ( $error == true ){
            //$query->is_404 = true;
            if ( isset( $_POST['result'] ) ) {
              if ( $_POST['result'] == $_COOKIE['result'] ) {
                $_COOKIE['esc_search_captcha'] = 1;
                setcookie('esc_search_captcha',1,0,'/');
                echo '<script>location.reload();</script>';
              }
            }
                  $num1 = rand(1,50);
            $num2 = rand(1,50);
            $result = $num1+$num2;
            $_COOKIE['result'] = $result;
            setcookie('result',urldecode($result),0,'/');
            ?>
                  <html>
            <head>
            <meta charset="UTF-8">
            <title>人机验证</title>
            <style>
            body{color: #333;text-align: center;font-size: 16px;}
            .erphp-search-captcha{margin: 50px auto 15px;max-width: 250px;width: 100%;padding: 40px 20px;border: 1px solid #ddd;text-align: center;border-radius: 5px;}
            .erphp-search-captcha form{margin: 0}
            .erphp-search-captcha input{border: none;border-bottom: 1px solid #666;width: 50px;text-align: center;font-size: 16px;}
            .erphp-search-captcha input:focus{outline: none;}
            .erphp-search-captcha button{border: none;background: transparent;color: #ff5f33;cursor: pointer;}
            .erphp-search-captcha button:focus{outline: none;}
            a{color: #000;font-size: 12px;}
            </style>
            </head>
            <body>
            <div class="erphp-search-captcha">
            <form action="" method="post"><?php echo $num1;?> + <?php echo $num2;?> = <input type="text" name="result" required /> <button type="submit">验证</button></form>
            </div>
            <a href="<?php echo home_url();?>">返回首页</a>
            </body>
            </html>
            <?php
            exit;
          }
        }
      }
    }
    add_action( 'parse_query', 'esc_search_captcha' );

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sadbird520 已回答的问题 2023年8月29日
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请问站长,这段代码加在wordpress的哪个文件里呀?


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Qi 发表新评论 2023年9月4日
Avatar for sadbird520

是加在你的主题下的funtion.php这个里面。

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