使用 foreach 循环未更新数据和未定义变量错误答案

【问题标题】：Data not updated and error of undefined variable with foreach loop使用 foreach 循环未更新数据和未定义变量错误
【发布时间】：2017-06-23 08:15:54
【问题描述】：

插入部分后有数据未更新。

有一个错误Notice: Undefined variable: domain in C:\wamp64\www\email_verify\index.php on line 69.

Notice: Undefined variable: target in C:\wamp64\www\email_verify\index.php on line 69.
Notice: Undefined variable: target_ip in C:\wamp64\www\email_verify\index.php on line 69.

如果在 textarea 中输入了三封电子邮件，则会出现 3 次错误。

插入第一部分后如何解决并更新数据？

代码在这里：

<?php

include_once('config.php');

if(isset($_POST["email_verify_btn"])) {    
    $email = $_POST["email_verify"];

    if(strpos($email,"\n")) {
        $text = explode("\n",$email);
    }

    function domain_exists($text)
    {
        $domain = substr(strrchr($text, "@"), 1);
        $arr = @dns_get_record($domain, DNS_MX);

        if ($arr[0]['host'] == $domain && !empty($arr[0]['target'])) {
            return $arr[0]['target'];
        }
    }

    foreach ($text as $abc) {
        $status = 1;
        $c_by = 1;
        $c_date = date('Y-m-d H:i:s');
        $c_ip = $_SERVER['REMOTE_ADDR'];
        $_SESSION['date_time'] = $c_date;

        $insert = $connect->query("INSERT INTO `email_verify_list`(`primary_email`,`session`,`status`,`created_by`, `created_date`, `created_ip`) VALUES ('$abc','".$_SESSION['date_time']."','$status','$c_by','$c_date','$c_ip')");   

        if($insert == 1) {
            $c_by = 1;
            $c_date = date('Y-m-d H:i:s');
            $c_ip = $_SERVER['REMOTE_ADDR'];                                                    

            if(filter_var($abc, FILTER_VALIDATE_EMAIL)) {                               
                if(domain_exists($abc)) {                               
                    $domain = substr(strrchr($abc, "@"), 1);

                    $data = @dns_get_record($domain, DNS_MX);

                    if($data) {
                        $status = "email id is valid";                      
                    }           

                    if (is_array($data) || is_object($data)) {                              
                        foreach ($data as $key1) {                          
                            $host = $key1['host'];
                            $target = $key1['target'];
                            $target_ip = gethostbyname($key1['target']);                        
                        }
                    }                               
                } else {
                    $status = "mx recored not exist";
                }                               
            } else {
                $status = "not in syntax" ;         
            }

            $insert_all = $connect->query("UPDATE `email_verify_list` SET `host_name`='$domain',`target`='$target',`target_ip`='$target_ip',`status`='$status' WHERE session='".$_SESSION['date_time']."'");
        }
    } 
}
?>

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=UTF-8"/>
<meta charset="utf-8"/>
<title>BULK EMAIL VARIFIER</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, shrink-to-fit=no"/>
<link rel="apple-touch-icon" href="pages/ico/60.png">
<link rel="apple-touch-icon" sizes="76x76" href="pages/ico/76.png">
<link rel="apple-touch-icon" sizes="120x120" href="pages/ico/120.png">
<link rel="apple-touch-icon" sizes="152x152" href="pages/ico/152.png">
<link rel="icon" type="image/x-icon" href="favicon.ico"/>
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-touch-fullscreen" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="default">
<meta content="" name="description"/>
<meta content="" name="author"/>
<link href="assets/plugins/pace/pace-theme-flash.css" rel="stylesheet" type="text/css"/>
<link href="assets/plugins/bootstrapv3/css/bootstrap.min.css" rel="stylesheet" type="text/css"/>
<link href="assets/plugins/font-awesome/css/font-awesome.css" rel="stylesheet" type="text/css"/>
<link href="assets/plugins/jquery-scrollbar/jquery.scrollbar.css" rel="stylesheet" type="text/css" media="screen"/>
<link href="assets/plugins/switchery/css/switchery.min.css" rel="stylesheet" type="text/css" media="screen"/>
<link href="pages/css/pages-icons.css" rel="stylesheet" type="text/css" />
<link class="main-stylesheet" href="pages/css/pages.css" rel="stylesheet" type="text/css"/>
<!--[if lte IE 9]>
    <link href="assets/plugins/codrops-dialogFx/dialog.ie.css" rel="stylesheet" type="text/css" media="screen" />
    <![endif]-->
</head>
<body class="fixed-header ">

<div id="rootwizard" class="m-t-50">

<ul class="nav nav-tabs nav-tabs-linetriangle nav-tabs-separator nav-stack-sm">
<li class="active">
<a data-toggle="tab" href="#tab1"><span>EMAIL VERIFY</span></a>
</li>
</ul>

<form  method="post" action="" > 

<div class="tab-content">
<div class="tab-pane padding-20 active slide-left" id="tab1">
<div class="row row-same-height">
<div class="col-md-12">
<div class="padding-30">
        <div class="row clearfix">
        <div class="col-sm-3">
        <div class="form-group form-group-default">
        <label><font size="2">ENTER YOUR EMAIL&nbsp;&nbsp;&nbsp;<span class="glyphicon glyphicon-envelope"></span></font></label><br>
        <textarea cols="43" rows="9" name="email_verify"  style="border-color:white;border-width:thin;padding:4pt;" multiple/></textarea><br>
        </div>
        </div>
        </div>
        <div class="row clearfix">
        <div class="col-sm-3">
        <button type="submit" name="email_verify_btn" class="btn btn-lg btn-info"  style="padding:11pt;width:200px;"/><span><b><font size="2">SUBMIT</font></b></span></button>
        </div>
        </div>  <br><br>
        <div class="row clearfix">
        <div class="col-sm-12">
        <table width="100%" class="table ">
        <tr class="success">
        <th>PRIMARY EMAIL&nbsp;&nbsp;&nbsp;<span class="glyphicon glyphicon-envelope"></span></th>
        <th>HOST NAME</th>
        <th>TARGET</th>
        <th>TARGET IP</th>
        <th>STATUS</th>
        </tr>
        <?php 

        $select = $connect->query("SELECT * from `email_verify_list` where session='".$_SESSION['date_time']."' ");
        while($row = $select->fetch_assoc()) {
        ?>
        <tr>
        <td><?php echo $row['primary_email']; ?></td>
        <td><?php echo $row['host_name']; ?></td>
        <td><?php echo $row['target']; ?></td>
        <td><?php echo $row['target_ip']; ?></td>
        <td><?php echo $row['status']; ?></td>
        </tr>
        <?php } ?>
        </table>
        </div>
        </div>
</div>
</div>
</div>
</div>
</div>
</form>

</div>



<script src="assets/plugins/pace/pace.min.js" type="text/javascript"></script>
<script src="assets/plugins/jquery/jquery-1.11.1.min.js" type="text/javascript"></script>
<script src="assets/plugins/modernizr.custom.js" type="text/javascript"></script>
<script src="assets/plugins/jquery-ui/jquery-ui.min.js" type="text/javascript"></script>
<script src="assets/plugins/bootstrapv3/js/bootstrap.min.js" type="text/javascript"></script>
<script src="assets/plugins/jquery/jquery-easy.js" type="text/javascript"></script>
<script src="assets/plugins/jquery-unveil/jquery.unveil.min.js" type="text/javascript"></script>
<script src="assets/plugins/jquery-bez/jquery.bez.min.js"></script>
<script src="assets/plugins/jquery-ios-list/jquery.ioslist.min.js" type="text/javascript"></script>
<script src="assets/plugins/jquery-actual/jquery.actual.min.js"></script>
<script src="assets/plugins/jquery-scrollbar/jquery.scrollbar.min.js"></script>
<script type="text/javascript" src="assets/plugins/classie/classie.js"></script>
<script src="assets/plugins/switchery/js/switchery.min.js" type="text/javascript"></script>
<script src="assets/plugins/bootstrap3-wysihtml5/bootstrap3-wysihtml5.all.min.js"></script>
<script type="text/javascript" src="assets/plugins/jquery-autonumeric/autoNumeric.js"></script>
<script type="text/javascript" src="assets/plugins/bootstrap-tag/bootstrap-tagsinput.min.js"></script>
<script type="text/javascript" src="assets/plugins/jquery-inputmask/jquery.inputmask.min.js"></script>
<script src="assets/plugins/bootstrap-form-wizard/js/jquery.bootstrap.wizard.min.js" type="text/javascript"></script>
<script src="assets/plugins/jquery-validation/js/jquery.validate.min.js" type="text/javascript"></script>
<script src="assets/plugins/bootstrap-datepicker/js/bootstrap-datepicker.js" type="text/javascript"></script>
<script src="assets/plugins/summernote/js/summernote.min.js" type="text/javascript"></script>
<script src="assets/plugins/moment/moment.min.js"></script>
<script src="assets/plugins/bootstrap-daterangepicker/daterangepicker.js"></script>
<script src="assets/plugins/bootstrap-timepicker/bootstrap-timepicker.min.js"></script>
<script src="pages/js/pages.min.js"></script>
<script src="assets/js/form_wizard.js" type="text/javascript"></script>
<script src="assets/js/scripts.js" type="text/javascript"></script>
<script src="assets/js/demo.js" type="text/javascript"></script>
<script>
         window.intercomSettings = {
           app_id: "xt5z6ibr"
         };
</script>
</body>
</html>

【问题讨论】：

我认为问题在于您总是进行更新，即使在 $host = $key1['host']; $target = $key1['target']; $target_ip = gethostbyname($key1['target']); 没有运行的情况下也是如此。
输出 $status 看看它说了什么。
所以域不存在并且$target等没有被设置，事实上你为什么认为它应该在这种情况下保存？另外，也许用有效的输入来测试它。
给if($insert == 1) {添加一个else大小写，并在那里输出插入错误。
那么$insert == 1这意味着插入工作？

标签： javascript php html css ajax

【解决方案1】：

在您的表中添加自动增量字段，并在插入查询运行后获取最后插入的记录 ID。并在 where 子句中将该 id 用于更新记录。

【讨论】：

【解决方案2】：

如果您只提交一封电子邮件，问题是没有设置 $text。

这应该不同：

if(strpos($email,"\n")) {
    $text = explode("\n",$email);
}

应该是的。

if(strpos($email,"\n")) {
    $text = explode("\n",$email);
} else {
    $text = array($email);
}

或者你可以这样做。

$text = explode("\n",$email);

【讨论】：

请查看代码是否到达INSERT语句，然后查看$insert中的返回值是什么