Basically in non-compatibility mode == does the same as PHP 4 (it compares object type and properties) and === compares object handles (this is because comparing object handles from our experience with Java isn't used that often and it's very useful to be able to use the PHP 4 == semantics).
In compatibility mode, both == and === compare object type and properties.
In any case, overloaded internal extensions, such as SimpleXML can still overload the cast_object() handler to cast their objects to scalars.
Andi
At 08:24 AM 5/10/2004 +0900, Rui Hirokawa wrote:
I performed the same test with HEAD (PHP 5.0.0RC3-dev (build: May 9 2004 10:16:50)).
There are no E_NOTICE message now, but, the problems are still existing with RC2,
PHP 4.3.6 same,not same,not same,same same,not same,not same,same
PHP 5.0.0-CVS 2004/5/9 (ze1_compatibility_mode = Off) same,not same,not same,same not same,not same,not same,same
PHP 5.0.0-CVS 2004/5/9 (ze1_compatibility_mode = On) same,same,not same,same not same,not same,not same,not same
Rui
On Sun, 09 May 2004 19:17:35 +0300 Andi Gutmans <[EMAIL PROTECTED]> wrote:
> Did you check HEAD? I fixed something to do with the comparison. if it > still doesn't work please let me know. > > Andi > > At 04:43 PM 5/9/2004 +0900, Rui Hirokawa wrote: > > >Hi, > > > >I think objects comparison in PHP5 has problems. > >Here is small sample code, > > > ><?php > >class Foo { > > var $v = 1; > > } > > class Boo { > > var $v = 1; > > } > > $a = new Foo; > > $b = new Foo; > > $c = new Boo; > > $d = new Foo; > > $d->v = 2; > > $e = $a; > > > >// value comparison > > echo $a == $b ? "same," : "not same,"; > > echo $a == $c ? "same," : "not same,"; > > echo $a == $d ? "same," : "not same,"; > > echo $a == $e ? "same" : "not same"; > > echo "\n"; > >// value and type comparison > > echo $a === $b ? "same," : "not same,"; > > echo $a === $c ? "same," : "not same,"; > > echo $a === $d ? "same," : "not same,"; > > echo $a === $e ? "same" : "not same"; > >?> > > > >The output from PHP4 and PHP5(ze1_compat on/off) is, > > > >PHP 4.3.6 : > > same,not same,not same,same > > same,not same,not same,same > > > >PHP 5.0.0RC2 zend.ze1_compatibility_mode=off : > > same,not same,not same,same > > (Notice: Object of class [Foo|Boo] could not be converted to integer) > > not same,not same,not same,same > > > >PHP 5.0.0RC2 zend.ze1_compatibility_mode=on : > > same,same,not same,same > > not same,not same,not same,not same > > > > > >The problem and question are, > >1. the different class is recognised as same in PHP5 (ze1_compat=on). > >2. the same object is recognised as different in PHP5 (ze1_compat=on). > >3. Why integer casting of object was implicitly applied in PHP5 > > (ze1_compat=off) ? > >
-- Rui Hirokawa <[EMAIL PROTECTED]>
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