Compiling a C program that was entered into a textbox and received via PHP?

Question

I have this problem: I want to pass a whole C code from a php textbox onto server and want to compile it with gcc and want the output back on php page. Is it possible?

Sample code:

php page input
<textarea>
#include<stdio.h>
void main()
{
printf("hello world");
}

Compiled on server terminal/shell

php page output:

hello world

Answer 1

Save the input as a file and call the necessary system commands on that file with the "exec()" function.

This is, however, INCREDIBLY DANGEROUS to do on a public webpage. Even if it isn't public, it's still not safe.