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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