PHP include() 在 doctype 之前，导致一个空格-php问题

PHP include() before doctype, causing a white space(PHP include() 在 doctype 之前，导致一个空格)

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问题描述

我的网站存在空白问题.我在 doctype 之前包含了一些文件这导致输出空白.

I have a website with a white space problem. I am including a few files before the doctype and this is causing a white space to be outputted.

搜索后我找到了这个解决方案:doctype前的空格问题

After searching I have found this solution: Problem with whitespace before doctype

但是在删除 ?> 之后我仍然遇到问题.下面是代码:

However after removing ?> I am still getting the problem. Below is the code:

<?php
include ("include/session.php");
include ("include/updatestage.php");                                        
?>
<!DOCTYPE HTML>....

这里是session.php:

<?php session_start();

// if a team name has been assigned to a session...
if ( isset($_SESSION ['teamName']))
{

//create "global variable $teamName that can be used across all pages as long as the function "session_start(); is present"
$teamName = $_SESSION ['teamName'];

}
else{

die ( "You are not logged in! Redirecting to login page...<meta http-equiv='REFRESH' content='2; url = index.php'>");

}

这里是updatestage.php:

<?php
include("config.php");
//update stage

$inserted="n";
mysql_query ("UPDATE `team` SET `inserted`='$inserted' WHERE teamName = '$teamName' ");

$advance="n";
mysql_query ("UPDATE `game` SET `advance`='$advance' ");

这里是getstageinfo.php:

<?php
include("include/config.php");
//Select the slogan from the current user
$currentStage = mysql_query("
SELECT `currentStage` FROM `team` WHERE `teamName` = '$teamName'
");
//assign the text located at the logo field (the path of the logo) to a variable $slogan
$row = mysql_fetch_assoc($currentStage);
$currentStage= $row['currentStage'];
?>

最后是 config.php:

<?php
// connect to database
$con = mysql_connect("xxxxxxx","xxxxxxx","xxxxxxx"); 

if (!$con)
      {
      die('Could not connect: ' . mysql_error());
      }

// select database 
mysql_select_db ("xxxxxxx");          
?>

//////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////////////////////

好的，所以我已经添加回 ?> 并尝试了以下建议:

Ok so I have added back in the ?> and tried the suggestions below:

<!DOCTYPE HTML>
<?php
include("include/session.php");
include("include/updatestage.php");
?>

或尝试:

<?php

echo "<!DOCTYPE HTML>
";

include ("include/session.php");
include ("include/updatestage.php");

?>

生产:

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at public_html/period1.php:2) in public_html/include/session.php on line 1

尝试:

<?php
include("include/session.php");
include("include/updatestage.php");
?><!DOCTYPE HTML>

或者:

<?php

  ob_start();

  echo "<!DOCTYPE HTML>
";

  include ("include/session.php");
  include ("include/updatestage.php");

  ob_end_flush();

?>

仍然产生空白.

推荐答案

你可以这样解决问题:

<?php
include ("include/session.php");
include ("include/updatestage.php");                                        
?><!DOCTYPE HTML>

但是我观察到这方面的错误行为(尽管不是自 PHP4 以来)，所以保证修复的最简单解决方案是将 <!DOCTYPE> 放在包含之前 - 因为两者都不包含file 输出任何内容，如果这样做会破坏您的文档.

But I have observed buggy behaviour in this respect (although not since PHP4), so the easiest solution that guarantees a fix is to put the <!DOCTYPE> before the include - since neither included file outputs anything, and would break your document if it did.

<!DOCTYPE HTML>
<?php

  include ("include/session.php");
  include ("include/updatestage.php");

?>
<!-- Rest of HTML -->

或者这个:

<?php

  echo "<!DOCTYPE HTML>
";

  include ("include/session.php");
  include ("include/updatestage.php");

?>
<!-- Rest of HTML -->

记得确保<?php标签中的<是所有文件中的第一个字符，如果你去的话使用第二个选项.

Remember to make sure that the < in the opening <?php tag is the first character in all files if you go with the second option.

编辑首先完全没有考虑到会话/cookies问题已经引起了它的丑陋，这里是一个可行的解决方案:

EDIT Having in the first place completely failed to take into account the session/cookies problem that has reared it's ugly head, here is a working solution:

<?php

  ob_start();

  echo "<!DOCTYPE HTML>
";

  include ("include/session.php");
  include ("include/updatestage.php");

  ob_end_flush();

?>
<!-- Rest of HTML -->

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