Upload, Compile and Download C File using PHP

Hi,


I am running a wamp server in windows.
I am trying to compile C file which I upload and then I will try to download it.
I can do an upload of c file.
I also can compile if I specify the name of the c file as the source and the name of the output that I want in the code.
I also can download it.
However, I am currently stuck at compile.
The code below is working

$output = system('"C:\Program Files\CodeBlocks\MinGW\bin\gcc.exe" "C:\Program Files\EasyPHP-5.3.9\www\upload\test1.c" -O3 -o "C:\Program Files\EasyPHP-5.3.9\www\upload\test1.exe"');

PHP:

I want the file that I upload is the file that I can compile
Hence I modify it to

$source=dirname(__FILE__).'\upload\\'.$_FILES['uploadedfile']['name'];
echo $source;
//mainfilename=test1
$outputname=substr_replace($_FILES['uploadedfile']['name'], 'exe', strpos($_FILES['uploadedfile']['name'], '.')+1);
$destination=dirname(__FILE__).'\upload\\'.$outputname;echo $destination;         
$output = system('"C:\Program Files\CodeBlocks\MinGW\bin\gcc.exe" $source -O3 -o $destination');

PHP:

$source and $destination produce the exact string as the code which is working. What am I missing to make this work?