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Posted by "Richard Lynch" on 07/25/05 04:31
On Fri, July 22, 2005 11:46 am, Surendra Singhi said:
>
> "Richard Lynch" <ceo@l-i-e.com> writes:
>> The & operator is not, as far as I know, defined for an array assignment
>> operation.
>>
>> True, you can use & in the parameter list in some versions to keep PHP
>> from copying the whole array. But that does not legitimatize what you
>> are
>> doing, I don't think.
>
> I never claimed, what I was doing was correct, rather I didn't knew well
> enough that 'PHP is not C++', and I was misunderstanding how reference and
> global variables work in PHP.
>>
>> I could be 100% wrong. I've never even *TRIED* to use a reference to an
>> array because I simply don't want to write code that confusing in the
>> first place.
>
> I don't think it will make the code confusing, but the person looking at
> the
> code should understand how reference and global variables work. Using
> reference variables avoids unnecessary extra copying of objects, and while
> using large arrays it can make a big difference in speed.
>
> The lesson to learn from this thread is that variables declared in a
> function
> as global (using global keyword) are new reference variables to the actual
> global variable. And, so when these global variables in functions are
> assigned
> a new reference, it breaks the old reference and makes them refer to the
> new
> location, and the actual global variable is not affected.
> But in contrast, if the global variables in the function are assigned a
> new
> value, this does changes the value of the variable in the outer global
> scope.
Well, *I* would be confused by the globals, references, and whatnot you've
got running around...
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