ID: 28800
User updated by: pmichaud at pobox dot com
Reported By: pmichaud at pobox dot com
Status: Open
Bug Type: Scripting Engine problem
Operating System: Linux
-PHP Version: known: 4.2.2, 4.3.6, 5.0.0RC3
+PHP Version: 4.3.6, 5.0.0RC2
New Comment:
Changed PHP version number to note bug exists in 5.0.0RC2.
Previous Comments:
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[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
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=28800&edit=1
