Warning:: No error (errno 0) in？

Question

Warning: chdir() [function.chdir]: No error (errno 0) in E:\PHPnow\htdocs\web\html\inc\zip.php on line 13Warning: Cannot modify header information - headers already sent by (output started at E:\PHPnow\htdocs\web\html\inc\zip.php:13) in E:\PHPnow\htdocs\web\html\inc\zip.php on line 15Warning: Cannot modify header information - headers already sent by (output started at E:\PHPnow\htdocs\web\html\inc\zip.php:13) in E:\PHPnow\htdocs\web\html\inc\zip.php on line 16Warning: Cannot modify header information - headers already sent by (output started at E:\PHPnow\htdocs\web\html\inc\zip.php:13) in E:\PHPnow\htdocs\web\html\inc\zip.php on line 17Warning: Cannot modify header information - headers already sent by (output started at E:\PHPnow\htdocs\web\html\inc\zip.php:13) in E:\PHPnow\htdocs\web\html\inc\zip.php on line 18Warning: Cannot modify header information - headers already sent by (output started at E:\PHPnow\htdocs\web\html\inc\zip.php:13) in E:\PHPnow\htdocs\web\html\inc\zip.php on line 19PK

Answer 1

Warning 在PHP里属于比较轻的错误提示，通常不会严重影响程序的正常运行。

Warning: chdir() 这个警告提示No error，那么可能是对于chdir() 这个函数，服务器端权限安全设置导致的。

Warning: Cannot modify header information

这种警告在PHP里比较常见，原因也有多样，解决办法：

1. 检查有<?php ... ?> 前面没有空白行，特别是include或者require的文件。不少问题是这些空白行导致的。

2. 在header后加上exit(); 

header ("Location: xxx");exit();

3. 用Javascrīpt来解决:

<? echo "<scrīpt> self.location( file.php );</scrīpt>"; ?>

4. 用输出缓存来解决:

<?php ob_start(); ?>... HTML codes ...<?php... PHP codes ...header ("Location: ....");ob_end_flush();?>

5. 开启php.ini中的

output_buffering = On