shell exec - How to run cmd commands as administrator from php -

i trying learn php shell_exec() function believe, enables run cmd commands within php script.but in system, when open command prompt , type in command, example, ipconfig, says :

'ipconfig' not recognized internal or external command, operable program or batch file. 

so in order avoid it, have right click command prompt , select "run administrator" , works fine.

now problem when try run similar commands ipconfig inside php script, same error given above. there way solve problem? mean there way run cmd commands administrator inside php?

i attaching sample code below, can edit , me out. in advance.

here's code :

<?php $output = shell_exec('ipconfig 2>&1'); echo $output; ?> 

output (which wish avoid)

'ipconfig' not recognized internal or external command,operable program or batch file.

right click command prompt , select "run administrator"

i assume using xampp , defualt install location. if not serach file php.exe , use full path.

c:\xampp\php\php.exe  full\path\file.php 

hence can run php script admin privilege.