From: pmichaud at pobox dot com
Operating system: Linux
PHP version: 4.3.6
PHP Bug Type: *General Issues
Bug description: Strings beginning with "inf" improperly converted
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 bug report at http://bugs.php.net/?id=28800&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=28800&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=28800&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=28800&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=28800&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=28800&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=28800&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=28800&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=28800&r=support
Expected behavior: http://bugs.php.net/fix.php?id=28800&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=28800&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=28800&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=28800&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=28800&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=28800&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=28800&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=28800&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=28800&r=float
