dede后台Fatal error： Allowed memory size of 8388608 bytes

　　解决方式一: ( 我用这方式就可以安装了)

　　打开在.htaccess 文件裡 最上面开头加上

　　php_value max_execution_time 1200

　　php_value memory_limit 200M

　　php_value post_max_size 200M

　　php_value upload_max_filesize 200M

　　解决方式二: (这我就不太会请高手解释)

　　或者在httpd.conf主机配置里改

　　解决方式三: (这个我试过没什麽作用..请高手帮忙解释)

　　如出现这种问题则表明，程序运行占用的记忆空间超过了8M,解决方法修改PHP.ini文件将

　　memory_limit = 8M ;

　　的值改为12M就可以了

　　This

　　error message can spring up in a previously functional PHP script when

　　the memory requirements exceed the default 8MB limit. Don’t fret,

　　though, because this is an easy problem to overcome.To change the memory

　　limit for one specific script by including a line such as this at the

　　top of the script:

　　ini_set(“memory_limit”,”12M”);

　　The 12M

　　sets the limit to 12 megabytes (12582912 bytes). If this doesn’t work,

　　keep increasing the memory limit until your script fits or your server

　　squeals for mercy.

　　You can also make this change permanently for all

　　PHP scripts running on the server by adding a line like this to the

　　server’s php.ini file:

　　memory_limit = 12M

　　Keep in mind that a

　　huge memory limit is a poor substitute for good coding. A poorly written

　　script may inefficiently squander memory which can cause severe

　　problems for frequently executed scripts. However, some applications are

　　run infrequently and require lots of memory like importing and

　　processing a big data file.