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Re: OT: and even in Dart .........Re: simple session question [message #175719 is a reply to message #175718] Sat, 22 October 2011 17:34 Go to previous messageGo to previous message
Thomas Mlynarczyk is currently offline  Thomas Mlynarczyk
Messages: 131
Registered: September 2010
Karma:
Senior Member
Luuk schrieb:
> i did send a bug-report:
> https://bugs.php.net/bug.php?id=60114

I do not see any bug here. I was confused because it's a crappy way to
code, but it's clear why it works the way it does:

$foo = 0;
$foo = $foo++;

is definitely identical to

$foo = 0;
$foo = ($foo++);

since ++ has higher precedence than =. In fact, ($foo = $foo)++ does
rightfully throw a parse error, since you can only increment a variable,
not an expression.

As mentioned before in this thread, the above code is equivalent to

$foo = 0;
$tmp = $foo; // $foo++ yields the previous value, which is 0
$foo = $foo + 1; // then $foo is incremented...
$foo = $tmp; // ...and then re-assigned the old value

It's the exact same procedure as it would be with $foo = $bar++.

Greetings,
Thomas

--
Ce n'est pas parce qu'ils sont nombreux à avoir tort qu'ils ont raison!
(Coluche)
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