TalkPHP - View Single Post - A little unclear about "global" keyword...

xenon · 06-08-2008, 01:52 PM

It's not called renaming, it's simply a statement to help the parser understand what is the variable that needs to be modified (is it coming from the namespace or is it coming from the current function -- the latter is assumed by default).

PHP Code:


			
$a = 5;

function showA()
{
    global $a; // not renaming anything, just letting the parser know that the $a is declared globally, and use its value, instead of defining a function-level variable called $a

    $a = 10;
}

showA();
echo $a; // will output 10, but if you remove the global statement (or comment it), it will output 5, of course

06-08-2008, 01:52 PM	#4 (permalink)
xenon The Frequenter Join Date: Dec 2007 Location: Bucharest, Romania Posts: 438 Thanks: 3	It's not called renaming, it's simply a statement to help the parser understand what is the variable that needs to be modified (is it coming from the namespace or is it coming from the current function -- the latter is assumed by default). PHP Code: `$a = 5; function showA() { global $a; // not renaming anything, just letting the parser know that the $a is declared globally, and use its value, instead of defining a function-level variable called $a $a = 10; } showA(); echo $a; // will output 10, but if you remove the global statement (or comment it), it will output 5, of course` __________________ I have optimistic thoughts, even though sometimes (if not always) life's a bitch.