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$plugins_dir
插件目录变量

This is the directories where Smarty will look for the plugins that it needs. Default is "plugins" under the SMARTY_DIR. If you supply a relative path, Smarty will first look under the SMARTY_DIR, then relative to the cwd (current working directory), then relative to each entry in your PHP include path.
该变量定义Smarty寻找所需插件的目录。默认是在SMARTY目录下的“plugins”目录。如果提供了一个相对路径,Smarty将首先在SMARTY目录下寻找,然后到当前工作目录下寻找,继而到php包含路径中的每个路径中寻找。

Technical Note: For best performance, do not setup your plugins_dir to have to use the PHP include path. Use an absolute pathname, or a path relative to SMARTY_DIR or the cwd.
技巧:为了获取最好性能,不要将插件目录安装成必须使用php包含路径的境地。最好用一个绝对路径名字,或者是一个相对SMARTY目录或当前工作目录的路径。

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