Passing variable number of arguments from array to function with call_user_func()?

[rob]

Hello,

If I have an array made up of a bunch of key =value pairs, how can I
pass the values of each key as an argument to a function, given that
the number of items in the array are not static (i.e: sometimes
there's one item, sometimes there's two)?

For example, if I have the following array:

$list = array('sky' ='blue', 'grass' ='green');
$list = array_values($list);

I'd like to pass the two values in $list to a function that has two
arguments, i.e:

function color($sky, $grass) { }

The trick is is that $list will not always contain two items -
sometimes one, three, four, etc, so it has to pass them dynamically to
the function. I know about call_user_func(), and how I can pass
parameters to it, but I'm having a difficult time trying to pass
multiple parameters given that I don't know how many I need to pass.

Can anyone help?

Rob

[amygdala]

"rob" <ro*@rawb.netschreef in bericht
news:11*********************@q75g2000hsh.googlegro ups.com...

Hello,

<snip>

The trick is is that $list will not always contain two items -
sometimes one, three, four, etc, so it has to pass them dynamically to
the function. I know about call_user_func(), and how I can pass
parameters to it, but I'm having a difficult time trying to pass
multiple parameters given that I don't know how many I need to pass.

Can anyone help?

Rob

call_user_func_array()

[Jerry Stuckle]

rob wrote:

Hello,

If I have an array made up of a bunch of key =value pairs, how can I
pass the values of each key as an argument to a function, given that
the number of items in the array are not static (i.e: sometimes
there's one item, sometimes there's two)?

For example, if I have the following array:

$list = array('sky' ='blue', 'grass' ='green');
$list = array_values($list);

I'd like to pass the two values in $list to a function that has two
arguments, i.e:

function color($sky, $grass) { }

The trick is is that $list will not always contain two items -
sometimes one, three, four, etc, so it has to pass them dynamically to
the function. I know about call_user_func(), and how I can pass
parameters to it, but I'm having a difficult time trying to pass
multiple parameters given that I don't know how many I need to pass.

Can anyone help?

Rob

Just pass them as an array, i.e.

color($list);

function color ($colors) {
if (is_array($colors))
foreach ($colors as $c)
process one color from the list here
else
process a single color here
}

You might want to make this a function which pulls out each item in the
list and calls another function to process a single color (if the
processing is separate, that is).


--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
js*******@attglobal.net
==================

[C.]

On 13 Aug, 01:42, rob <[e-mail]:

>
For example, if I have the following array:

$list = array('sky' ='blue', 'grass' ='green');
$list = array_values($list);

I'd like to pass the two values in $list to a function that has two
arguments, i.e:

function color($sky, $grass) { }

call_user_func('color', $list);

function color()
{
$params = func_get_args();
....

But it's much cleaner to do this:

color($list);

function color($list) // expect an array as input
{
....

Which eliminates the positional problems which are exacerbated by
variable argument parsing.

C.