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# realpath

(PHP 4 , PHP 5)

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.

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

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

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