WordPress给搜索页前加人机验证码

WordPress搜索功能比较消耗性能,遇到蜘蛛抓取到了搜索页面时,可能会导致爆内存。

下面代码加到主题的 functions.php 里,给搜索页前加人机验证码,可以避免恶意搜索消耗性能。

/*
Plugin Name: 搜索验证码
*/
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' );

版权声明:
作者:逐凨
链接:https://izhufeng.cn/wordpress/358.html
来源:逐风
文章版权归作者所有,未经允许请勿转载。

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