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realpath

Returns canonicalized absolute pathname (PHP 4, PHP 5)
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.

Parameters

path

The path being checked.

Return Values

Returns the canonicalized absolute pathname on success. The resulting path will have no symbolic link, '/./' or '/../' components.

realpath() returns FALSE on failure, e.g. if the file does not exist. On BSD systems realpath() doesn't fail if only the last path component doesn't exist, while other systems will return FALSE.

Examples

Example 668. realpath() example

<?php
chdir
('/var/www/');
echo
realpath('./../../etc/passwd');
?>

The above example will output:

/etc/passwd