Resolving Multiple Definition Errors for Global Variables in C
The Problem
When multiple source files include a header that defines global variables, the linker reports multiple definition errors. Consider a header file (main.h) that directly defines global arrays:
#ifndef __MAIN_H
#define __MAIN_H
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define max 100
struct studen ...
Posted on Wed, 24 Jun 2026 17:37:45 +0000 by Scooby08
Global Variables in PHP 7 Internals
In PHP, variables declared outside of functions or classes are considered global. These reside in the main script scope and can be accessed within functions or methods using the global keyword.
function incrementId() {
global $counter;
$counter++;
}
$counter = 1;
incrementId();
echo $counter; // outputs 2
Initialization of Global Vari ...
Posted on Fri, 15 May 2026 22:31:09 +0000 by mcovalt