Question

我正在尝试为我的网站创建这个简单的电子邮件订阅表单。每次添加电子邮件时，我都希望输入框确认电子邮件已添加。这看起来很简单，但我无法动态地在输入框中回答答案。我知道如何使用Javascript更改输入值，但它似乎没有包含在PHP中。

编辑：我对PHP不是很熟悉。我知道我不应该在我的函数中包含Javascript，它只是我想要实现的一个例子。

有更简单的方法吗？

谢谢！

    <div id="email_form">
    <form action="" method="post">
    <input name="email" class="email" type="text" placeholder="Subscribe" id="emailinput"><button type="submit" name="SubmitButton" class="btn_email"><b>&gt;</b></button>
    </form>
    </div>


    <?php    
if(isset($_POST['SubmitButton'])){ //check if form was submitted

$to = "myemail@email.com";
$from = "no-reply@email.com";

$headers = "From: " . $from . "\r\n";

$subject = "New subscription";
$body = "New user subscription: " . $_POST['email'];


if( filter_var($_POST['email'], FILTER_VALIDATE_EMAIL) )
{ 
    if (mail($to, $subject, $body, $headers, "-f " . $from))
    {
        echo '<script type="text/javascript">';
        echo 'var elem = document.getElementById("emailinput");';
        echo 'elem.value = "Submited!";';
        echo '</script>';   
    }
    else
    {
       echo 'It works but There was a problem with your e-mail (' . $_POST['email'] . ')';   
    }
}
else
{
   echo 'It kinda works but there was a problem with your e-mail (' . $_POST['email'] . ')';   
}

}    
?>

Answer 1

在回复表单之前，请对提交内容进行处理。然后，如果电子邮件处理成功，当您回显输入框时，使用属性值=＆＃34;成功回显您的输入！＆＃34;

Answer 2

谢谢大家，把PHP放在第一位并回应价值。我实际上是在使用占位符而不是值，所以它不可编辑。

首次在Stackoverflow上提问，绝对不会让这个伟大的社区感到失望。

以下是我的最终参考代码：

<?php    
    if ( isset($_POST['SubmitButton']) ) {
        $to      = "myemail@email.com";
        $from    = "no-reply@email.com";
        $headers = "From: " . $from . "\r\n";
        $subject = "New subscription";
        $body    = "New user subscription: " . $_POST['email'];
        $message = "";
        $value   = "";

        if( filter_var($_POST['email'], FILTER_VALIDATE_EMAIL) ) { 
            if (mail($to, $subject, $body, $headers, "-f " . $from)) {
                $value = "Submited!";
            } else {
                $value = "Invalid Email";   
            }
        } else {
                $value = "Invalid Email";  
        }
    }    
?>

<div id="email_form">
    <form action="" method="post">
        <input name="email" class="email" type="text" id="emailinput" placeholder="<?php echo $value; ?>" />
        <button type="submit" name="SubmitButton" class="btn_email">
            <b>&gt;</b>
        </button>
    </form>
</div>

使用PHP和Javascript更改输入值

2 个答案: