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Posted by Henk Verhoeven on 08/03/06 21:14
Hi,
To be honest, i think the "solution" of php4 to reference anomalies
sucks. I suggest you use php5, or php 4.3. In php4.4 you have to resort
to this kind of ugly code:
function &getAttribute( $name )
{
if ( isset( $this->attributes[ $name ] ) )
return $this->attributes[ $name ];
$null = NULL;
return $null;
}
BTW, you may not need $this->attributes, you can do:
function setAttribute( $name, $value )
{
$this->$name = $value;
}
function &getAttribute( $name )
{
if ( isset( $this->$name ) )
return $this->$name;
$null = NULL;
return $null;
}
Greetings,
Henk Verhoeven.
More info about reference anomalies:
http://www.phppeanuts.org/site/index_php/Pagina/167/reference+anomaly.html
jamiesonhale@gmail.com wrote:
> Consider a class that encapsulates an associative array. It has two
> "setter" methods:
>
> class A
> {
> ...
> function setAttribute( $name, $value )
> {
> $this->attributes[ $name ] = $value;
> }
> ...
> function setAttributeByRef( $name, &$value )
> {
> $this->attributes[ $name ] =& $value;
> }
> ...
>
> The following "getter" method *used* to work just fine prior to version
> 4.4.2:
>
> ...
> function & getAttribute( $name )
> {
> if ( isset( $this->attributes[ $name ] ) )
> return $this->attributes[ $name ];
> return NULL;
> }
> ...
>
> However, as of version 4.4.2, this throws a "FATAL: Only variable
> references should be returned by reference." error. Unfortunately, my
> host (and several of my client hosts) are stuck on this version.
>
> Is there an elegant way to solve this problem? I want to return a value
> indicating that no such attribute exists.
>
> (I've googled the problem and can't find anything useful other than a
> suggestion in a PHP bug report that I learn how to write "proper"
> code.)
>
> Thanks!
>
> J
>
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