From: jvm at jvmyers dot com
Operating system: Mac OSX 10.4.11
PHP version: 5.2.5
PHP Bug Type: Strings related
Bug description: short-circuiting on compound boolean in if expression
Description:
------------
Note: I am on a Mac and PHP 5.2.4 is the most recent version available
from entropy.
Problem: Compound booleans expressed as string args in an 'if' statement
don't 'appear' to work as expected:
Context:
1. I generate an array of counters.
2. I dynamically generate a compound boolean based on selected counters
in the array. (Note: since the real array is sparse, I must use the
'empty' operator).
3. When I submit the compound boolean as the expression of an 'if'
statement, the 'if' appears to resolve ONLY the first element of the
compound boolean.
Conclusion: appears to be a short-circuiting issue
Case 1: 'if' expression passed as string => "1. Conditions met"
Case 2: same as Case 1, but using catenation operator => "2. Conditions
met"
Case 3: same 'if' expression but passed in context => "3. Conditions not
met"
Reproduce code:
---------------
<?php
$aArray = array(1,0);
$sCondition = "!empty($aArray[0]) && !empty($aArray[1])";
if ($sCondition)
{
echo "Case 1. Conditions met<br />";
}
else
{
echo "Case 1. Conditions not met<br />";
}
if ("".$sCondition."")
{
echo "Case 2. Conditions met<br />";
}
else
{
echo "Case 2. Conditions not met<br />";
}
if (!empty($aArray[0]) && !empty($aArray[1]))
{
echo "Case 3. Conditions met<br />";
}
else
{
echo "Case 3. Conditions not met<br />";
}
?>
Expected result:
----------------
See, Case 3, above.
Actual result:
--------------
See, Case 1 and Case 2, above.
--
Edit bug report at http://bugs.php.net/?id=44236&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=44236&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=44236&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=44236&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=44236&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=44236&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=44236&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=44236&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=44236&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=44236&r=support
Expected behavior: http://bugs.php.net/fix.php?id=44236&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=44236&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=44236&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=44236&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=44236&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=44236&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=44236&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=44236&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=44236&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=44236&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=44236&r=mysqlcfg
