   #PHP Manual Filesystem functions readlink rename

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                                   realpath

   (PHP 4 )
   realpath -- Returns canonicalized absolute pathname

Description

   string realpath ( string path)

   realpath() expands all symbolic links and resolves references to
   '/./', '/../' and extra '/' characters in the input path and return
   the canonicalized absolute pathname. The resulting path will have no
   symbolic link, '/./' or '/../' components.

   realpath() returns FALSE on failure, e.g. if the file does not exists.

   Example 1. realpath() example
   <?php
   $real_path = realpath("../../index.php");
   ?>

   See also: basename(), dirname(), and pathinfo().
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