how can i access a folder or file in parent folder php

Question

i want a shared folder which contains images to be accessed by html pages inside sub folders.(child folders)

Answer 1

If you mean your html folder and images folder are siblings, you're probably looking for the .. directory... um, thingy.

Your files look like:

/www
    /html
        index.php
    /images
        myimage.png

Write an img tag like this:

<img src="../images/myimage.png" />