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In PHP I want to know the differences between the GLOBAL and GLOBALS.
Some example:
print_r($GLOBALS);
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Global symbol table stores all information related to the global scope of the program, and is accessed in Python using globals() method. The functions, variables which are not associated with any class or function are stored in global scope.
Superglobal Variables in PHP are predefined global variables. Global variables are variables with global scope, which means that they can be used wherever needed – they do not need to be declared, nor do they need to be marked with global in functions.
A global variable is a programming language construct, a variable type that is declared outside any function and is accessible to all functions throughout the program.
Difference is: $_GET retrieves variables from the querystring, or your URL.> $_POST retrieves variables from a POST method, such as (generally) forms.
That are two different things related to the same: global variables.
$GLOBALS - PHP superglobal array representing the global variable table accessible as an array. Because it's a superglobal, it's available everywhere.
An associative array containing references to all variables which are currently defined in the global scope of the script. The variable names are the keys of the array.
global - Keyword to import a specific global variable into the local variable table.
Then you asked:
But why we cant access the session and cookie variables by using
$GLOBALS?
That's wrong, you can access session and cookie variables by using $GLOBALS:
$GLOBALS['_SESSION']['session_variable_name']
However $_SESSION is a superglobal as well, so you don't need to use either $GLOBALS nor global to access session variables from everywhere:
$_SESSION['session_variable_name']
Same applies to $_COOKIE.
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