Instantiating an object does have some extra overhead that the static
call bypasses.
How much overhead depends on the complexity of the object, I would
predict that it's mainly in its constructor and any parent
constructors.
I can't speak to differences in PHP4/PHP5 in this specific regard, but
would make a wild guess that they would not be THAT different in
performance if the thing works in both.
On Sun, April 30, 2006 9:12 am, Edward Vermillion wrote:
> I'm still trying to get my head around all the OOP stuff and was
> wondering if there is any basic difference between calling a static
> function as opposed to creating an object, in situations where both
> methods will do the same thing for you. Is there any overhead to
> creating an object from a class that might impact time/memory
> consumption(efficiency), or does PHP treat these two methods the
> same? I'm currently working with PHP4 but am also curious as to how
> it works in PHP5.
>
> I.E.:
>
> <pseudoCode>
> class Foo {
>
> var $_vars = array();
>
> function &setVar1($var) {
> static $localVars = array();
> if (!empty($localVars[$var])) {
> return $localVars[$var];
> } else {
> $localVars[$var] =& new $var();
> return $localVars[$var];
> }
> }
>
> function &setVar2($var) {
> if (!empty($this->_vars[$var])) {
> return $this->_vars[$var];
> } else {
> $this->_vars[$var] =& new $var();
> return $this->_vars[$var];
> }
> }
> }
>
> $result1 =& Foo::setVar1('something');
>
> $bar = new Foo();
> $result2 =& $bar->setVar2('something');
> </pseudoCode>
>
> Right now I'm working on an object controller type of class, but I
> can see where I might run into this situation in other areas where
> storing a value in a static function variable or a class variable
> would accomplish much the same thing as far as the calling code is
> concerned.
>
> Any thoughts?
>
> Ed
>
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