PHP 基于表单不发送内容？寻找新鲜的目光

Question

我正在编写一个简单的 PHP 订阅表单，当它运行时它什么也没做。 PHP 看起来像这样：

<form class='subscribe' method='post' action='<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>'>
                Subscribe for occasional updates and reminders!
                Email: <input type='text' class='input' name='email' id='email' >
                <!--There will be some type of CAPTCHA here-->
                    <label for='Subscribe'>
                        <input value='Subscribe' type='submit' id='subscribebutton' class='input' name='subscribebutton'>
                    </label>
                <span class='error'><?php echo $inError ?> </span>
                <?php
                      $email = '';
                      $inError = '';
                      if($_SERVER['REQUEST_METHOD'] == 'POST') {
                        if(empty($_POST['email']))
                            $inError = "You must provide an email to register!";
                        elseif(stripos($_POST['email'],'@') !== TRUE || stripos($_POST['email'],'.') !== TRUE)
                            $inError = "Please provide a properly formatted email to register.";
                        else
                        {
                            $email = sanatizeInput($_POST['email']);
                            $emailFile = fopen('emails.txt','a') or die ('Sorry. Subscriptions are disabled for the time being.');
                            fwrite($emailFile, $email);
                        }
                      }
                      function sanatizeInput($data) {
                          $data = trim($data);
                          $data = stripslashes($data);
                          $data = htmlspecialchars($data);
                          return $data;
                      }

                ?>

如果我提交没有内容或内容格式不正确的表单，它不会抛出错误，它不会写入文件，当我按下提交按钮时它似乎什么也没做（尽管它确实清除了字段并出现提交表格）。
这可能是一些简单的事情，但我的眼睛完全看不到它。
任何帮助将不胜感激。
提前致谢，扎克

Answer 1

正确关闭表单标签，然后将您的 php 代码移至页面顶部。像这样的东西，它应该可以工作。

<?php
$email = '';
$inError = '';
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    if (empty($_POST['email']))
        $inError = "You must provide an email to register!";
    elseif (stripos($_POST['email'], '@') !== TRUE || stripos($_POST['email'], '.') !== TRUE)
        $inError = "Please provide a properly formatted email to register.";
    else {
        $email = sanatizeInput($_POST['email']);
        $emailFile = fopen('emails.txt', 'a') or die('Sorry. Subscriptions are disabled for the time being.');
        fwrite($emailFile, $email);
    }
}

function sanatizeInput($data) {
    $data = trim($data);
    $data = stripslashes($data);
    $data = htmlspecialchars($data);
    return $data;
}
?>
<form class='subscribe' method='post' action='<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>'>
    Subscribe for occasional updates and reminders!
    Email: <input type='text' class='input' name='email' id='email' >
    <!--There will be some type of CAPTCHA here-->
    <label for='Subscribe'>
        <input value='Subscribe' type='submit' id='subscribebutton' class='input' name='subscribebutton'>
    </label>
    <?php if(!empty($inError)){ ?><span class='error'><?php echo $inError; ?> </span> <?php } ?>
</form>

PHP 基于表单不发送内容？寻找新鲜的目光

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