在doctype之前PHP包含（），导致空格 [英] PHP include() before doctype, causing a white space
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，这导致输出一个空格。
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之前的空白问题
After searching I have found this solution: Problem with whitespace before doctype
但是在删除？> 之后我就是仍然遇到问题。以下是代码：
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'];
?>
最后这里是 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，我已经添加回来了？>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>\n";
include ("include/session.php");
include ("include/updatestage.php");
?>
产生：
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>\n";
include ("include/session.php");
include ("include/updatestage.php");
ob_end_flush();
?>
仍然产生空格。
推荐答案
你可以解决这个问题：
<?php
include ("include/session.php");
include ("include/updatestage.php");
?><!DOCTYPE HTML>
但我观察到这方面的错误行为（虽然不是自PHP4以来），所以最简单的解决方案是保证修复是在包含之前放置<！DOCTYPE> - 因为两个文件都没有输出任何内容，并且会破坏你的文件。
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>\n";
include ("include/session.php");
include ("include/updatestage.php");
?>
<!-- Rest of HTML -->
请记住确保< 在开头<？php 标签是所有文件中的第一个字符，如果你选择第二个选项。
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已经养成丑陋头脑的会话/ cookie问题，这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>\n";
include ("include/session.php");
include ("include/updatestage.php");
ob_end_flush();
?>
<!-- Rest of HTML -->
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