链接提交按钮到另一个页面。

huangapple
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英文:

Link submit button to another page

问题

我想将一个提交按钮链接到另一个PHP页面。但是，在表单标签中使用action不允许接下来的PHP代码被执行。我无法获取变量$_SESSION['logged']的值为1。是因为页面直接转到"messages.php"之前整个代码都被执行了吗？

英文:

I want to link a submit button to another PHP page. But using action in form tag doesn't allow the PHP code that comes next to be executed. I don't get the variable $_SESSION['logged']'s value to be 1. Is it because the page directly goes to the "messages.php" before the whole code is executed?

  1. <?php
  2. session_start();
  3. ?>
  4. <!DOCTYPE html >
  5. <html  >
  6. <body class="main">
  7.     <form action="messages.php" method="post">
  8. 	    <p><center>Username : <input type="text" name="user" class="form-control"/></center></p>
  9. 		<p><center>Password : <input type="password" name="pswd" class="form-control"/></center></p>
  10. 		<p><center><input type="submit"  value="Log in" class="btn btn-primary"/></center></p>
  11. 		</div>
  12.     </form>
  13. <?php
  14. $_SESSION['logged']=0;
  15. $_SESSION['user'] = '';
  16. $_SESSION['pswd'] = '';
  18. if (isset($_POST['user']) AND isset($_POST['pswd']) )
  19. {
  20.     $user=$_POST['user'];
  21.     $pswd=$_POST['pswd'];
  22.     $account = new Account();
  23.     try {
  24.     	$logged = $account->LogIn($user, $pswd);
  25.     } catch (Exception $e) {
  26.     	/* Something went wrong: echo the exception message and die */
  27. 	    echo $e->getMessage();
  28.     	die();
  29.     }
  30.     $_SESSION['logged']=1; #1 means logged in
  31. }
  32. ?>
  33. </body>
  34. </html>

答案1

得分: 2

以下是您要翻译的内容：

  1. <form action="?" method="post">
  2.     <p><center>用户名：<input type="text" name="user" class="form-control"/></center></p>
  3.     <p><center>密码：<input type="password" name="pswd" class="form-control"/></center></p>
  4.     <p><center><input type="submit" value="登录" class="btn btn-primary"/></center></p>
  5. </form>
  7. 然后，在应用业务逻辑后重定向到 messages.php：
  9. <?php
  11. $_SESSION['logged'] = 0;
  13. $_SESSION['user'] = '';
  14. $_SESSION['pswd'] = '';
  16. if (isset($_POST['user']) AND isset($_POST['pswd']))
  17. {
  18.     $user = $_POST['user'];
  19.     $pswd = $_POST['pswd'];
  21.     $account = new Account();
  22.     try
  23.     {
  24.         $logged = $account->LogIn($user, $pswd);
  25.         $_SESSION['logged'] = 1; #1 表示已登录
  27.         $script = "<script>
  28.         window.location = 'messages.php';</script>";
  29.         echo $script;
  30.     }
  31.     catch (Exception $e)
  32.     {
  33.         /* 出现问题：输出异常消息并终止 */
  34.         echo $e->getMessage();
  35.         die();
  36.     }
  37. }
  39. ?>
英文:

The form should be with the action on the page you are making the logic, which means the present one:

  1. &lt;form action=&quot;?&quot; method=&quot;post&quot;&gt;
  2.             &lt;p&gt;&lt;center&gt;Username : &lt;input type=&quot;text&quot; name=&quot;user&quot; class=&quot;form-control&quot;/&gt;&lt;/center&gt;&lt;/p&gt;
  3.             &lt;p&gt;&lt;center&gt;Password : &lt;input type=&quot;password&quot; name=&quot;pswd&quot; class=&quot;form-control&quot;/&gt;&lt;/center&gt;&lt;/p&gt;
  4.             &lt;p&gt;&lt;center&gt;&lt;input type=&quot;submit&quot;  value=&quot;Log in&quot; class=&quot;btn btn-primary&quot;/&gt;&lt;/center&gt;&lt;/p&gt;
  5.         &lt;/div&gt;
  6.         
  7.         &lt;/form&gt;

And then, after applying busines logic redirect to messages.php:

  1.     &lt;?php
  3. $_SESSION[&#39;logged&#39;]=0;
  5. $_SESSION[&#39;user&#39;] = &#39;&#39;;
  6. $_SESSION[&#39;pswd&#39;] = &#39;&#39;;
  8. if (isset($_POST[&#39;user&#39;]) AND isset($_POST[&#39;pswd&#39;]) )
  9. {
  10.     $user=$_POST[&#39;user&#39;];
  11.     $pswd=$_POST[&#39;pswd&#39;];
  14. $account = new Account();
  15. try
  16. {
  17.     $logged = $account-&gt;LogIn($user, $pswd);
  18.     $_SESSION[&#39;logged&#39;]=1; #1 means logged in
  20. $script = &quot;&lt;script&gt;
  21. window.location = &#39;messages.php&#39;;&lt;/script&gt;&quot;;
  22. echo $script;
  25. }
  26. catch (Exception $e)
  27. {
  28.     /* Something went wrong: echo the exception message and die */
  29.     echo $e-&gt;getMessage();
  30.     die();
  31. }
  34. }
  36. ?&gt;

huangapple
  • 本文由 发表于 2023年6月1日 03:31:05
  • 转载请务必保留本文链接：https://go.coder-hub.com/76376726.html
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