<?php 

$aaa=basename($SCRIPT_NAME) ;
$bbb=dirname($SCRIPT_NAME) ;
echo"

SCRIPT_NAME=$SCRIPT_NAME <BR>

PHP_SELF=$PHP_SELF<BR>
aaa=basename(SCRIPT_NAME)=$aaa <BR>
bbb=dirname(SCRIPT_NAME)=$bbb
"; 
?> 

결과...

SCRIPT_NAME=/cgi-bin/php3/path_info.php3 
PHP_SELF=/cgi-bin/php3/path_info.php3 
aaa=basename(SCRIPT_NAME)=path_info.php3 
bbb=dirname(SCRIPT_NAME)=/cgi-bin/php3