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经验之谈:PHP安装设置技巧总结

Jun 13, 2016 am 11:05 AM
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刚刚学习PHP时,你可能会为PHP安装设置问题而烦恼,这里将介绍PHP安装设置的一些小技巧,在这里拿出来和大家分享一下。

1: doc_root设置

php3.ini中的doc_root就像web的documentroot, 如果include "/xxx/xxx"; 就会自动自動把第一個 /变成doc_root的设置.

比如:php3.ini中doc_root设置为c:mp,那么当include "/dir1/aaa.php"时你的aaa.php应该在c:mpdir1目录下 

2: php4.00的session设置

在php4.00版本中设置session的tmp目录老是不好设置,其实你只要将tmp目录设置为php的当前盘的根目录就可以了

比如:你的php4在e盘,只要在e盘根目录建立一个tmp目录就可以了但是,最新的版本中好象没有这个问题了.

3: 我上传文件,怎么老错

有的时候往往是最基本的东西忘记了,比如在php.ini中有没有设定uploadtemp_dir. 

4: solaris下php4.0.0如何才能支持sybase

首先你得安装sybase client软件,否则编译php时会提示找不到.h文件. 然后在编译php前运行configure脚本时,加上--with-sybase参数. 然后用make命令编译php,make install安装它,修改httpd.conf 重启动apache daemon. That's all.

5: 为什么我的crypt()用不了

crypt()是UNIX/Linux下的,在MS下你不能直接用,除非有一个php_crypt.dll文件

6: PHP中有ASP中的application变量吗?

没有,至少到目前的版本中还没有!不过你可以通过别的方法实现.
(1)Linux/Unix下,可以通过共享内存的方法实现(phpchina.com上有一文章)
(2)可以通过数据库方式或文件方式实现
(3)其它的方式...

7: Session的疑惑

问: 如果通过代理服务器,共用一个IP地址,那么,存在服务器上的session会不会冲突啊?

答: 其实,不用担心这个问题,session是建立在cookie之上的,只是一个信息存在服务器,一个存在客户端,它和ip是没有关系的. 

8: Cookie的疑惑

问: 我在本地机子上测试COOKIE来保存留言簿里的一些值,以方便下 次留言时不用填写,但我发现了这样一个情况: 就是在我的整个网页没有关闭之前一切正常,但如果关闭了网页 重新打开后就不能把COOKIE保留的值读出来,无论我把COOKIE的 有效时间设为多大也没用,请问为什么会这样???如果通过代理服务器,共用一个IP地址,那么,存在服务器上的session会不会冲突啊?

答: cookie的默认有效期是连线状态,也就是说,你可以在浏览器与这个站点链接的时候,cookie有效, 只要你有一个窗口是开着的,这个cookie就仍然有效,但是,当你关掉最后一个窗口的时候,你与这个站点之间的链接就失效了,当然, 你的cookie 也就失效了.你可以用 setcookie('$cookie_name','$cookie_vaue',time()+$sec+8*3600);来设定有效期。以上就是我在工作中总结的PHP安装设置的小技巧,你学会了吗?
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