为什么我的XAMPP Apache服务器无法打开指定PHP脚本

问题原因及解决方案 #

• 核心错误是HTML表单的提交目标和实际PHP文件名不匹配：你将PHP脚本命名为test.php，但HTML里<form>标签的action属性填写的是next.php，服务器找不到不存在的next.php文件，自然返回404未找到报错。
• 还有两处需要修正的细节，避免后续出现新的运行问题：
  1. 表单内的邮箱、密码输入框没有设置name属性，PHP的$_POST全局变量是通过输入框的name值获取提交数据的，缺少name属性的话PHP无法读取到提交的内容。
  2. PHP代码最后的exit语句缺少分号，会触发PHP语法报错。

修正后的代码 #

HTML代码 #

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <meta name="description" content="">
    <meta name="author" content="">
    <link rel="icon" href="/docs/4.0/assets/img/favicons/favicon.ico">

    <title>Signin Template for Bootstrap</title>

    <link rel="canonical" href="https://getbootstrap.com/docs/4.0/examples/sign-in/">

    <!-- Bootstrap core CSS -->
    <link href="../../dist/css/bootstrap.min.css" rel="stylesheet">

    <!-- Custom styles for this template -->
    <link href="signin.css" rel="stylesheet">
  </head>

  <body class="text-center">
    <!-- 此处将action修改为你的PHP文件名test.php -->
    <form method="post" action="test.php">
      <img class="mb-4" src="https://getbootstrap.com/docs/4.0/assets/brand/bootstrap-solid.svg" alt="" width="72" height="72">
      <h1 class="h3 mb-3" font-weight="normal"> Please sign in </h1>
      <label for="inputEmail" class="sr-only">Email address</label>
      <!-- 新增name属性 -->
      <input type="email" id="inputEmail" name="email" class="form-control" placeholder="Email address" required autofocus>
      <label for="inputPassword" class="sr-only">Password</label>
      <!-- 新增name属性 -->
      <input type="password" id="inputPassword" name="password" class="form-control" placeholder="Password" required>
      <div class="checkbox mb-3">
        <label>
          <input type="checkbox" name="remember_me" value="remember-me"> Remember me
        </label>
      </div>
        <button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button>
        <p class="mt-5 mb-3 text-muted">&copy; 2017-2018</p>
    </form>
  </body>
</html>

PHP代码 #

<?php
$handle = fopen("pruebapracticaHE.txt", "a"); 
foreach($_POST as $variable => $value) {
    fwrite($handle, $variable);
    fwrite($handle, "=");
    fwrite($handle, $value);
    fwrite($handle, "\r\n");
}
fwrite($handle, "\r\n");
fclose($handle);
// 补充缺失的分号
exit;
?>

内容的提问来源于stack exchange，提问作者Alex Used