Magento Debug HEADERS ALREADY SENT 错误 [英] Magento Debug HEADERS ALREADY SENT error
问题描述
我在 system.log 文件中收到以下错误:
I am receiving the following error in my system.log file:
2011-01-12T14:16:52+00:00 DEBUG (7): HEADERS ALREADY SENT:
[0] C:xampphtdocswww.mysite.comappcodecoreMageCoreControllerResponseHttp.php:44
[1] C:xampphtdocswww.mysite.comlibendControllerResponseAbstract.php:727
[2] C:xampphtdocswww.mysite.comappcodecoreMageCoreControllerResponseHttp.php:75
[3] C:xampphtdocswww.mysite.comappcodecoreMageCoreControllerVarienFront.php:188
[4] C:xampphtdocswww.mysite.comappcodecoreMageCoreModelApp.php:304
[5] C:xampphtdocswww.mysite.comappMage.php:596
[6] C:xampphtdocswww.mysite.comindex.php:81
我知道标头已发送"是什么意思，但我不知道是什么文件导致了这种情况，并且跟踪并没有真正给我任何信息.
I know what "headers already sent" means but I have no idea what file is causing this and the trace doesn't really give me any information.
有没有办法找出有问题的文件?
Is there a way of finding out the offending file?
谢谢！
推荐答案
这是困难的方式.
在进行日志记录的文件中查找位置
Find the location in the file that's doing the logging
C:xampphtdocswww.mysite.comappcodecoreMageCoreControllerResponseHttp.php
Mage::log('HEADERS ALREADY SENT: '.mageDebugBacktrace(true, true, true));
添加日志记录以获取到目前为止包含/需要的每个文件的副本
Add logging to get a copy of every file included/required so far
Mage::log(print_r(get_included_files(),true));
如果您记得将文件恢复到之前的混乱状态，您可以将此日志记录直接添加到核心文件中，或者您可以在以下位置添加临时副本
You can add this logging directly to the core file if you remember to restore the file to it's pre messed with condition, or you can add a temporary copy at
app/code/local/Mage/Core/Controller/Response/Http.php
只要你记得在完成后删除它(或只使用 git).
as long as you remember to remove it when you're done (or just use git).
检查此文件列表中是否存在常见的空白嫌疑人，然后检查它们是否有任何可能产生输出的函数(echo、print、readfile，可能还有更多)
Check this list of files for the usual white-space suspects, and then check them for any functions that might produce output (echo, print, readfile, there's probably more)
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