浮光掠影——php的safe_mode

来源：互联网发布：linux运行windows程序编辑：程序博客网时间：2024/05/04 23:26

从 http://hipop.aliapp.com 迁移

好吧，本博客的开篇作，就从wp的安装说起吧。

本博客安装完成之后，有一个大问题：无法上传文件

报如下错误：

Warning: copy() [function.copy]: SAFE MODE Restriction in effect. The script whose uid is 697074 is not allowed to access /wp-content/uploads owned by uid 2001 in /wp-admin/includes/file.php on line 348Warning: copy(/wp-content/uploads/spring.jpg) [function.copy]: failed to open stream: No such file or directory in/wp-admin/includes/file.php on line 348Warning: Cannot modify header information - headers already sent by (output started at /wp-admin/includes/file.php:348) in /wp-includes/pluggable.php on line 866

打眼一看，知道是权限问题和php安全模式在作祟。解决问题之前先认识问题，所以先让我们回忆回忆啥是“safe_mode”：

php的官方说明里如下解释：

The PHP safe mode is an attempt to solve the shared-server security problem. It is architecturally incorrect to try to solve this problem at the PHP level, but since the alternatives at the web server and OS levels aren’t very realistic, many people, especially ISP’s, use safe mode for now.

PHP的安全模式是为了试图解决共享服务器的安全问题，它（结构性错误地？）在php层上尝试解决这些问题，但因为在硬件或操作系统层上想解决这些问题不太好办，所以许多人，尤其是ISP，他们仍然在使用安全模式。

你看看，PHP自己都承认safe_mode ”incorrect“！更是在5.4.0以后的php版本中删除了这个模式（在5.3.0会报告过时）

（ISP到底在担心什么，真的没有很好的解决方案吗，我们是否需要safe_mode?….未完待续）