Paramater of function as global

Flybersite

Hi all

I'm trying to write a function that gets a value from an array

Now what I am trying to do is this:

function getValue($array,$keyFromArray)
{
global [the value of $array should be represented here as a variable];
}

Is this somehow possible?

Thanks in advance

dagon

if you make a var global inside a function it will only be global for that function see:

http://nz.php.net/global

What problem are you actully trying to solve?

NogDog

If all you want to do is get the value, I see no reason for declaring it as global. But since I see no need for a function to get a value from an array, I suspect there is some important information here we are not yet privy to, as Dagon suggested above.

In any case, the use of "global" is almost always an undesired technique, mainly due to the strong coupling it creates between the function and the application.

Installer

The "global" keyword doesn't make a variable global; the variable is global already. So "global $array;" means "make the global variable $array available to this function." (The global scope comprises everything outside of functions and classes.)

In your example code $array is passed to the function as a parameter. You can use it as you wish in the function. For example, "$array[] = 10;" or "echo $array[$keyFromArray];". If you want changes inside the function to affect the global array, make the parameter a reference: function getValue(& $array, $keyFromArray), or, usually better, return a value to apply to the array.

laserlight

It sounds like you want to modify the argument from within the function, so I would go with Installer's suggestion of using pass by reference for the parameter.