ID: 8661
Updated by: jmoore
Reported By: [EMAIL PROTECTED]
Old-Status: Analyzed
Status: Duplicate
Bug Type: Scripting Engine problem
PHP Version: 4.0.4
Assigned To:
Comments:
dup of 8130
Previous Comments:
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[2001-03-16 03:58:55] [EMAIL PROTECTED]
I don't agree with this. The zend engine only does a shallow copy in this particular
instance, and it is a bug. If the array is not accessed through a method in the
object, the copy is performed correctly. Please re-analyze this.
---------------------------------------------------------------------------
[2001-03-15 09:20:44] [EMAIL PROTECTED]
Zend copies arrays and objects "shallow" (for performance
reasons). The workaround is to implement "clone" method.
This probably should be built-in function in Zend.
---------------------------------------------------------------------------
[2001-02-28 00:21:05] [EMAIL PROTECTED]
My bad, my email address is [EMAIL PROTECTED]
Please detail on a fix for this bug.
Thanks,
Larry
---------------------------------------------------------------------------
[2001-01-11 16:55:42] [EMAIL PROTECTED]
The workaround that I have had to implement is doing an explicit clone method (similar
to a copy constructor) and when making a copy, say
$new = $old->clone();
instead of
$new = $old;
example implementation:
class Element
{
var $value;
function &clone()
{
$obj = new Element();
$obj=>value = $this->value;
}
}
class X
{
var $array;
function &clone()
{
$obj = new X();
foreach($this->array as $index => $value)
{
$obj->array[$index] = $value->clone();
}
return $obj;
}
}
---------------------------------------------------------------------------
[2001-01-11 16:46:44] [EMAIL PROTECTED]
Yes, this is the same, if I change the method to
do_nothing() in the Element class and print out a message,
the same behavior happens. The behavior is that if I call a method on an array object
after the array has been copied, the copy now refers to the original. Also, if the
method is called on the original object, the copy is then linked with the original.
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The remainder of the comments for this report are too long. To view the rest of the
comments, please view the bug report online.
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