PHP在表单上重新加载当前页面提交

问题描述：

I have a form on a page to submit a comment, and once a user places a comment I would like it to reload the page.

This is what I got

      $insertGoTo = "employer.php?employer=" . $row_employer_page['employer'] . "";
  if (isset($_SERVER['QUERY_STRING'])) {
    $insertGoTo .= (strpos($insertGoTo, '?')) ? "&" : "?";
    $insertGoTo .= $_SERVER['QUERY_STRING'];
  }
  header(sprintf("Location: %s", $insertGoTo));
}

It works, however I got this error on submit.

    Notice: Undefined variable: row_employer_page in /u/students/m/*******/public_html/cis231/project/employer.php on line 51

Warning: Cannot modify header information - headers already sent by (output started at /u/students/m/*******/public_html/cis231/project/employer.php:51) in /u/students/m/*******/public_html/cis231/project/employer.php on line 56

The lines it references are the code I posted above. I'm not sure what's going on, it reload the page how I want but throws that error

我在页面上有一个表单提交评论，一旦用户发表评论，我希望它重新加载页面。 p>

这就是我得到的 p>

  $ insertGoTo =“employer.php？employer =”。  $ row_employer_page ['雇主']。  “”; 
 if（isset（$ _ SERVER ['QUERY_STRING']））{
 $ insertGoTo。=（strpos（$ insertGoTo，'？'））？  “＆安培;”  ：“？”; 
 $ insertGoTo。= $ _SERVER ['QUERY_STRING']; 
} 
标题（sprintf（“位置：％s”，$ insertGoTo））; 
} 
  code>  
 
 它有效，但我在提交时遇到此错误。   p> 
 
 
 注意：未定义的变量：第51行的/u/students/m/*******/public_html/cis231/project/employer.php中的row_employer_page 
  
警告：无法修改标题信息 - 已经发送的标题（输出从/u/students/m/*******/public_html/cis231/project/employer.php:51开始）/ u / students / m 第56行上的/*******/public_html/cis231/project/employer.php 
  code>  pre> 
 
 它引用的行是我上面发布的代码。 我不确定发生了什么，它重新加载页面我想要的但却抛出了这个错误 p> 
  div>

答

You can not send headers once you've echoed content already (at line 56). That header function. You may want to use a template engine though and echo the compiled template at the end of the file.

Another solution would be to capture the output with http://php.net/manual/de/function.ob-start.php and flush it afterwards.

答

On the top of your code:

<?php
ob_start();

?>

PHP在表单上重新加载当前页面提交

相关推荐