PHP电子邮件订阅，无法发布php文件

Question

嘿，我尝试登录文本文件时遇到电子邮件订阅问题。

<!-- Signup Form -->
        <form id="signup-form" action="form.php" method="post">
            <input type="email" name="email" id="email" placeholder="Email Address" />
            <input type="submit" value="Sign Up" />
        </form>

这是我的PHP代码：

<?php
if(empty($_POST['submit']) === false) {
    $email = htmlentities(strip_tags($_POST['email']));

    $logname = 'email.txt';
    $logcontents = file_get_contents($logname);

    if(strpos($logcontents,$email)) {
        die('You are already subscribed.');
    } else {
        $filecontents = $email.',';
        $fileopen = fopen($logname,'a+');
        $filewrite = fwrite($fopen,$filecontents);
        $fileclose = fclose($fileopen);
        if(!$fileopen or !$filewrite or !$fileclose) {
        die('Error occured');
        } else {
            echo 'Your email has been added.';
        }
    }
}
?>

我一直无法获取POST /form.php事件，而php文件在该路径下，有人知道我可能做错了什么？ 我为此不干了:(

Answer 1

首先，将名称属性添加到您的提交按钮，如在POST中一样，您将不会获得“提交”的表单值，并且您的代码将永远不会前进

  <form id="signup-form" action="form.php" method="post"> <input type="email" name="email" id="email" placeholder="Email Address" /> <input type="submit" name="submit" value="Sign Up" /> </form> 

现在在您的php代码中，您只需要检查$ _POST ['submit']是否符合条件，并且还输入了错字，您使用了未定义的变量$ fopen，请对其进行更改。

<?php
   if($_POST['submit']) {
        $email = htmlentities(strip_tags($_POST['email']));
        $logname = 'email.txt';
        $logcontents = file_get_contents($logname);

        if(strpos($logcontents,$email)) {
            die('You are already subscribed.');
        } else {
            $filecontents = $email.',';
            $fileopen = fopen($logname,'a+');
            $filewrite = fwrite($fileopen,$filecontents);
            $fileclose = fclose($fileopen);
            if(!$fileopen or !$filewrite or !$fileclose) {
            die('Error occured');
            } else {
                echo 'Your email has been added.';
            }
        }
    }
?>