php exec function help

Hi there,

I am new to PHP could someone help please.

How do i use exec() function to open paintshop? I am executing  this in cmos

I can open mspaint but not the specific image i want to open.. How do i specify so it opens exact bin.jpg or some other image?

what if it is a variable?
 
<?php
echo "Please enter a .jpg image";
 
$jpg = trim(fget(STDIN));
exec("'mspaint'.$jpg");
 
?> 

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