Do you mean the APP_DIR constant?
These constants can be useful when working with files for example, when needing an absolute path APP is good, or even WWW_ROOT / WEBROOT_DIR when uploading images to a public directory.
Just pr() each of these constants and if you'll see the output... If you're not sure what the use is, it's likely you don't need to use it right now.
p.s. I often use these constant with Configure::write() to define new paths for use within my application.
On 31 January 2014 06:54, Sayam Abbas <abbassayam@gmail.com> wrote:
what is the use of APP_URL costant?--
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