From: [EMAIL PROTECTED]
Operating system:
PHP version: 4.1.2
PHP Bug Type: Documentation problem
Bug description: Associativity of assignment operators listed wrongly
The operators page at /manual/en/language.operators.php lists the the
assignment operators (=, +=, etc.) as being left associative, but they
must logically be right associative. Left associativity would mean that
this:
$a = $b = 0;
was interpreted as:
($a = $b) =0;
which is clearly nonsensical. Indeed a quick test shows that:
$d = $c += $a += $b += 4;
is interpreted as:
$d = ($c += ($a += ($b += 4)));
which looks like right associativity to me!
(Actually, a little further testing suggests that the assignment operators
need some special annotations, as they don't appear to strictly obey their
stated precedence level. For example, the statement:
$x = $z + $y = 543;
if interpreted strictly according to the precedence rules should be
equivalent to:
$x = ($z + $y) = 543;
which would be a parse error, but in fact is interpreted as:
$x = $z + ($y = 543);
which may be the "obvious" intention, but had me WTF-ing for a while!!)
--
Edit bug report at http://bugs.php.net/?id=17386&edit=1
--
Fixed in CVS: http://bugs.php.net/fix.php?id=17386&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=17386&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=17386&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=17386&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=17386&r=support
Expected behavior: http://bugs.php.net/fix.php?id=17386&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=17386&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=17386&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=17386&r=globals
