Question

我正在尝试在mysql数据库中创建一个订阅条目。每次我提交表单时，都会创建一个新条目，而电子邮件地址或输入值不会出现在数据库中。请找出问题所在。

<?php
include 'dbh.php';
$subs=$_POST['$sub_email']:
$sql="INSERT INTO subscribe(sub) VALUES('$subs')";
$result=mysqli_query($conect,$sql);
header("Location:index.html");
?>

<form class="form" method="post" action="subscribe.php" style="margin-top: 20px">
    <div class="input-group">
        <div class="input-group-addon">@</div>
        <input type="email" class="form-control" name="subs_email" id="inlineFormInputGroup" placeholder="Your Email">
    </div>
    <button  type="submit" class="btn btn-success btn-lg" style="margin-top:5px " >Submit</button>
</form>

Answer 1

请注意，您的HTML输入具有属性name="subs_email"

因此，您的$_POST数组索引应该是subs_email而不是$subs_email

$subs=$_POST['subs_email']:

Answer 2

如果电子邮件ID不存在，请尝试以下代码插入：

<?php
include 'dbh.php';
if(isset($_POST['subs_email'])) {
    $subs = mysqli_real_escape_string($conect, $_POST['subs_email']);   //escape variables for security
        // insert if email id not exist
    $result = mysqli_query($conect,"SELECT `sub` FROM `subscribe` WHERE  `sub` = '".$subs."' LIMIT 1");
    if (mysqli_num_rows($result) <= 0) { {
        $sql = "INSERT INTO subscribe (sub) VALUES('".$subs."')";
        $result = mysqli_query($conect,$sql);
    }
    header("Location:index.html");
}
?>

<form class="form" method="post" action="subscribe.php" style="margin-top: 20px">
    <div class="input-group">
        <div class="input-group-addon">@</div>
        <input type="email" class="form-control" name="subs_email" id="inlineFormInputGroup" placeholder="Your Email">
    </div>
    <button  type="submit" class="btn btn-success btn-lg" style="margin-top:5px " >Submit</button>
</form> **strong text**

表单的输入未更新

2 个答案: