当我在发件人字段中收到两次列表电子邮件的表单响应时

以下内容可能写在两行上，但实际上会将电子邮件地址连接到上一个电子邮件地址。

$headers = "From: $email";  
$headers .= " $email";/* try commenting out this line */

如所示

From: myemail@gmail.com myemail@gmail.com [mailto:myemail@gmail.com myemail@gmail.com]

在下面的代码中，您将覆盖第二行的头变量，因为您没有连接字符串。

 $headers .= "Reply-To: $email";
 $headers = "From: $email";

尝试将其更改为：

 $headers .= "Reply-To: $email";
 $headers .= "From: $email";

根据你的原作，因为苏格兰正在下雨，我很无聊，所以我写了这篇文章，我希望它能有所帮助。我认为其中一个问题是标头中使用的行结尾，正如下面的评论中所指出的，在访问captcha检查的返回值时，语法似乎有点奇怪。

在我的测试中使用的表单页面上，我使用了：

head
----
<script type='text/javascript'>
    var key='<?php echo GOOGLE_RECAPTCHA_KEY; ?>';
    /* this is the public key */
    function verifyCaptcha(){
        grecaptcha.render( 'grc', {
            'sitekey'   :   key,
            'theme'     :   'light',
            'size'      :   'compact'
        });
    }
</script>
<script src='https://www.google.com/recaptcha/api.js?onload=verifyCaptcha&render=explicit' async defer></script>

body
----
<form name='mailtest' method='post' action='/test/target.php'>
    <h1>Google reCaptcha form mail test</h1>
    <input type='text' name='name' placeholder='Please enter your name' required />
    <input type='text' name='phone_number' placeholder='Please enter your phone' required />
    <input type='text' name='their-message' placeholder='Please enter your message' required />
    <input type='email' name='email' placeholder='Please enter your email address' required />
    <!-- empty placeholder for re-captcha -->
    <div id='grc'></div>
    <!-- A new form element will be created by the recaptcha if successful -->
    <!--
        g-recaptcha-response
    -->
    <input type="submit" value="Send email" />
</form>


form action script
------------------
<?php
    $after = "http://www.website.co.uk/thankyou.htm";
    $oops = "http://www.website.co.uk/error.htm";
    if( $_SERVER['REQUEST_METHOD']=='POST' ){

        /* Config: edit these to suit */
        $recipient='myemail@gmail.com';
        $subject='Contact Form Enquiry';
        $google_secret='abc-def-123-456xxxxxxxxx';


        /* Container in which to build message */
        $message=array();
        $headers=array();

        /* Fields of relevance to the email */
        $fields=array( 'email', 'submit', 'name', 'phone_number', 'their-message' );
        foreach( $fields as $field ){
            /* Assign as a variable variable */
            $$field=( isset( $_POST[ $field ] ) && !empty( $_POST[ $field ] ) ) ? trim( filter_input( INPUT_POST, $field, FILTER_SANITIZE_STRING ) ) : false;
            /* Add to message */
            if( $$field ) $message[]="{$field}: {$$field}";
        }
        /* Add elements to the headers array */
        $headers[]="From: {$email}";
        $headers[]="Reply-To: {$email}";
        /*
            These are pertinent to Outlook so could be set too
            --------------------------------------------------
            $headers[]="Importance: Normal";
            $headers[]="Sensitivity: Private";
            $headers[]="Priority: Urgent";
            $headers[]="Comments: an email from x";
            $headers[]="Keywords: x,y,z";
            $headers[]="Cc: user@example.com";
            $headers[]="Bcc: user@example.com";
        */

        /* Get submitted captcha image data */
        $captcha=isset( $_POST['g-recaptcha-response'] ) && !empty( $_POST['g-recaptcha-response'] ) ? $_POST['g-recaptcha-response'] : false;
        if( !!$captcha===false ) header( 'location: '.$oops.'?captcha=empty' );

        $response=file_get_contents( "https://www.google.com/recaptcha/api/siteverify?secret=".$google_secret."&response=".trim( $captcha )."&remoteip=".$_SERVER['REMOTE_ADDR'] );
        /* decode */
        $response=json_decode( $response );
        /* The syntax you had seemed incorrect as it used a dot notation */
        if( $response->success ){
            /* To debug output and expected mail send parameters */
            exit("mail( '"$recipient'", '"$subject'", '"".implode( PHP_EOL, $message )."'", '"".implode( "'r'n", $headers )."'" )");
            /* Send the mail*/
            $res=@mail( $recipient, $subject, implode( "'n", $message ), implode( "'r'n", $headers ) );
            /* Redirect based upon mail sending success / failure */
            if( $res ) header( 'location: '.$after.'?mailsent=true' );
            else header( 'location: '.$oops.'?mailsent=false' );
        } else {
            /* Get the reason straight from the horses mouth */
            $reason=implode('_',$response->{'error-codes'});
            /* Redirect because capture failed */
            header( 'location: '.$oops.'?captcha=failed&reason='.$reason );
        }

    } else {
        /* Redirect - incorrect method */
        header( 'location: '.$oops.'?method=bad' ); 
    }
?>

成功验证并提交表单后，调试的输出为：

邮件（"myemail@gmail.com"，"联系表格查询"，"电子邮件：joe.bloggs@example.com姓名：joe bloggs电话号码：0141 3533789他们的留言：你好，我需要你的帮助。。。再见，谢谢所有的鱼"，"来自：joe.bloggs@example.com答复：joe.bloggs@example.com"）

示例输出没有显示的是行结尾为'r'n。顺便说一句，我假设url www.website.co.uk只是作为一个例子~就像example.com一样？如果没有，则表单的操作中存在拼写错误。