On Sat, 21 Jun 2003 19:24:26 +0200, you wrote:
>I want to call this generic echo function within a class, but have
>trouble referencing the output function with $this-> .
>Any suggestions? Maybe there is a better solution to this?
>
>This is within a class:
>
>[snip]
># generic WALK functions
> function walkit($array)
> {
> array_walk($array,"$this->output"); //not
>working
> }
>
> function output($item,$key)
> {
> echo "$key. $item<br />\n";
> }
You want to apply a function that's wrapped in a class to a given array?
My first reaction is that your best approach is to invoke a function within
a class, without creating an instance of that class. See the :: operator.
The following code covers several ways of calling functions wrapped in
classes. You probably want the last two calls:
<?
/* Class A has method B */
class A {
function B ($s = "None") {
echo ("<p>input : $s</p>");
}
}
/* $C is an instance of A */
$C = new A ();
/* $D is an array of strings */
$D = array('item 1', 'item 2', 'item 3', 'item 4');
/* invoke A::B */
A::B ('call 1');
/* invoke $C->B */
$C->B ('call 2');
/* invoke A::B via call_user_func() */
call_user_func (array('A', 'B'), 'call 3');
/* invoke $C->B via call_user_func() */
call_user_func (array($C, 'B'), 'call 4');
/* invoke A::B via call_user_func_array() */
call_user_func_array (array('A', 'B'), array('call 5'));
/* invoke $C->B via call_user_func_array() */
call_user_func_array (array($C, 'B'), array('call 6'));
/* apply A::B to $D via array_walk() */
array_walk ($D, array('A', 'B'));
/* apply $C->B to $D via array_walk() */
array_walk ($D, array($C, 'B'));
?>
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