array always new

solution A
0

1 $myarray=array();
2 .. code that fill $myarray;
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solution B
0

1 unset($myarray);
2 .. code that fill $myarray;
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if myarray going from point 0, when it is at point 1
is make new totally?
I want that in the point 2 the array is how the first time used
(not affect by previous use; all how new )

artev wrote:
> 1 $myarray=array();

I think this is better then second variant.