I'm surprised. I would have thought that it would have been the other way
around. Passing by reference should have similar implications to reference
counting as used the Zend engine. It means that physical memory does not
have to be allocated to passed variables (thereby saving resources in
physical memory and time used in allocating and copying memory).
In fact, because the Zend engine uses reference counting it will in effect
use pass by reference for all parameters. In the case of a parameter passed
as 'non-reference' it will only be allocated its own memory at a time that
the parameter value is changed within the function. You can see a detailed
explanation of how reference counting works here:
http://www.zend.com/zend/art/ref-count.php
I am not familiar with the parser source, so these are purely my thoughts on
my understanding of the parser behaviour. I'd be interested to hear of other
peoples views.
-----Original Message-----
From: Yasuo Ohgaki [mailto:[EMAIL PROTECTED]]
Sent: 30 March 2001 10:08
To: [EMAIL PROTECTED]
Subject: Re: [PHP] Passing by reference deprecated?
FYI
Unless you need to modify and return modified contents of variables, pass by
reference makes script execution a little slower under PHP4.
--
Yasuo Ohgaki
""Neil Kimber"" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Pass by reference itself is not deprecated, just call-time
> pass-by-reference.
> I believe this means your calling line of code being prevented from
> specifying that it should be invoked as pass-by-reference.
>
> So,
>
>
> function NormalPassByRefence(&$prmValue)
> {
> $prmValue ++;
> }
>
> $numValue=1;
> NormalPassByRefence($numValue); // This will still work
> // $numValue =2 at this point
>
>
> function CallTimePassByRefence($prmValue)
> {
> $prmValue ++;
> }
>
> $numValue=1;
> CallTimePassByRefence(&$numValue); // This will no longer work - it's
been
> deprecated
> // $numValue =1 at this point
>
>
>
>
> -----Original Message-----
> From: CC Zona [mailto:[EMAIL PROTECTED]]
> Sent: 30 March 2001 04:40
> To: [EMAIL PROTECTED]
> Subject: [PHP] Passing by reference deprecated?
>
>
> set_value(&$variable,$value)
> {
> $variable=value;
> }
>
> "Warning: Call-time pass-by-reference has been deprecated - argument
passed
> by value; If you would like to pass it by reference, modify the
declaration
> of [runtime function name](). If you would like to enable call-time
> pass-by-reference, you can set allow_call_time_pass_reference to true in
> your INI file. However, future versions may not support this any longer. "
>
> When did passing by reference get deprecated? The documentation at
> <http://php.net/manual/en/language.references.pass.php> doesn't suggest
> what to do instead--in fact, it uses an example like the syntax above. So
> my next question is: would using a return value or declaring a global be
> the (only) other options?
>
> TIA
>
> --
> CC
>
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>
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