ID: 28800
Updated by: [EMAIL PROTECTED]
Reported By: pmichaud at pobox dot com
-Status: Open
+Status: Verified
Bug Type: Scripting Engine problem
Operating System: Linux
PHP Version: 4.3.6, 5.0.0RC2
New Comment:
Verified that this is indeed the case. Since we are using strtol()
internally here, I would actually expect INF for both your "inf" and
"infinity" cases. The strtol() spec says that this should be the
result. And a quick local check verifies this, but the others
definitely shouldn't be returning INF. It looks like we are not
checking the end pointer returned from strtol() at all in any of our
conversion functions. We need something like this:
l = strtol(s, &endp, 0);
if (s != endp && *endp == `\0') {
... valid conversion ...
}
Previous Comments:
------------------------------------------------------------------------
[2004-06-20 05:08:46] pmichaud at pobox dot com
Changed PHP version number to note bug exists in 5.0.0RC2.
------------------------------------------------------------------------
[2004-06-20 05:05:27] pmichaud at pobox dot com
Changed PHP version number to note reports of bug in many versions of
PHP.
------------------------------------------------------------------------
[2004-06-20 04:49:31] pmichaud at pobox dot com
Changed bug category.
------------------------------------------------------------------------
[2004-06-15 22:26:40] pmichaud at pobox dot com
Description:
------------
PHP seems to incorrectly convert strings beginning with "inf" to INF
(infinity). This includes converting strings such as "info" and
"inflammable". Surprisingly, the strings "inf" and "infinity" do *not*
convert to infinity but correctly become zeros. A script that
illustrates the problem is given below:
This is very annoying because one cannot simply do a test for a
positive number with code such as
if ($x>0) { echo "$x is positive"; }
because if $x is any string beginning with "inf" (but not "inf" or
"infinity") it is treated as a positive number.
Pm
Reproduce code:
---------------
Here's a script that illustrates the problem:
<?php
header("Content-type: text/plain");
$a = "into";
$b = "info";
$c = "inf";
$d = "infinity";
$e = "infin";
$f = "inflammable";
echo "a: $a == ",$a+0,"\n"; # outputs 0 (correct)
echo "b: $b == ",$b+0,"\n"; # outputs INF, incorrect!
echo "c: $c == ",$c+0,"\n"; # outputs 0 (?!)
echo "d: $d == ",$d+0,"\n"; # outputs 0 (?!)
echo "e: $e == ",$e+0,"\n"; # outputs INF, incorrect!
echo "f: $f == ",$f+0,"\n"; # outputs INF, incorrect!
?>
Expected result:
----------------
a: into == 0
b: info == 0
c: inf == 0
d: infinity == 0
e: infin == 0
f: inflammable == 0
Actual result:
--------------
a: into == 0
b: info == INF
c: inf == 0
d: infinity == 0
e: infin == INF
f: inflammable == INF
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=28800&edit=1
