我无法通过php [重复]发送表单输入

Question

这个问题在这里已有答案：

• “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP 28回答

所以，我有这个代码，并且无法向我的电子邮件发送输入，我该如何解决这个问题？我已经尝试了数百万种方法，但仍然无法解决这个问题，我观看了很多视频和教程，但我认为问题出现在我的代码中。如何使此代码有效？

 <form action="email_handler.php">
    <div class="subscribe-form">
        <h2 class="heading">Check your compatibility with your favorite person </h2>
        <div class="grid grid--gutter-small grid--auto-sizing">

            <div class="grid  grid__item">
                <label for="firstName">Your name</label>
                <input action="mailto:[email protected]" id="mynum" placeholder="Name" class="input" type="text"  name="name1" required />
            </div>

            <div class="grid  grid__item">
                <label for="lastName">Your surname</label>
                <input id="mynum1" placeholder="Surname" class="input" type="text" name="name2" required/>
            </div>

            <div class="grid  grid__item">
                <label for="lastName">His/Her name</label>
                <input id="mynum2" placeholder="Name" class="input" type="text" name="name3" required />
            </div>

            <div class="grid  grid__item">
                <label for="lastName">His/Her surname</label>
                <input id="mynum3" placeholder="Surname" class="input" type="text" name="name4" required />
            </div>




            <div class="grid grid__item">
                <button type="button" id="check" class="button" name="submit">Check</button>
            </div>

            <div class="grid grid__item">
                    <div class="out">
                        <p class="name2" id="out"></p>
                    </div>
                    </div>
        </div>
    </div>
    </form>
<?php  
    if(isset($_POST['submit'])){
        $name=$_POST['name'];
        $name1=$_POST['name1'];
        $name2=$_POST['name2'];
        $name3=$_POST['name3'];


        $to='[email protected]';
        $subject='Sovmestimost';
        $message="Name: ".$name."\n"."Surname: ".$name1."\n"."His/her name:      ".$name2."\n"."His/her second name: ".$name3;
        $headers="From: ".$name;
    }
?>

Answer 1

在你的形式方法属性缺失

<form action="email_handler.php" method ="post">