Hello,
Sorry to hijack, but I started thinking about something I read
for optimization of php.
They stated, if you know your not going to make changes
to a variable, to send it to a function as reference, as to NOT
make a copy of it...
Is this really worthwhile?
func($a)
{
echo $a;
}
VS
func(& $a)
{
echo $a;
}
- Ben
----- Original Message -----
From: "Cliff Hirsch" <[EMAIL PROTECTED]>
To: "NYPHP Talk" <[email protected]>
Sent: Monday, November 19, 2007 3:01 PM
Subject: Re: [nyphp-talk] Why is pass-by-reference deprecated?
On 11/19/07 1:27 PM, "Gary Mort" <[EMAIL PROTECTED]> wrote:
Cliff Hirsch wrote:
The php manual says:
³In recent versions of PHP you will get a warning saying that
"Call-time pass-by-reference" is deprecated when you use a & in
foo(&$a);²
Why is this? Besides being ugly, difficult to understand and not very
elegant, is there any reason technical reason why this is deprecated?
Because if you declare it in the function:
function foo(&$mya) {
}
Than you have told PHP that whenever this function is used, variables
should be passed by reference and not copied.
So the thinking is, you should know ahead of time whether or not you
want to pass by reference or pass a copy, and not decide to do it at the
time you call your code.
IE, don't do:
foo(&$a);
Ah, I got it. Pass-by-reference in the function call is what's depricated.
As in foo(&$a); (as you noted above).
Pass-by-reference in the function definition is not depricated. As in
public function Thefunction(&$varref) {
}
Still ugly and error prone compared to clean oop, but passing objects around
is sort of the same thing and infinitely more confusing.
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http://www.nyphp.org/show_participation.php
