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Bug #16568 string comparison features give opposing results
Submitted: 2002-04-12 10:46 UTC Modified: 2002-04-12 11:32 UTC
From: lent at fstrf dot org Assigned:
Status: Not a bug Package: Strings related
PHP Version: 4.1.2 OS: SunOS 5.6
Private report: No CVE-ID: None
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From: lent at fstrf dot org
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 [2002-04-12 10:46 UTC] lent at fstrf dot org 
NOTE: in the examples below the $myrow array is a string array populated by an ingres select statement.

if $myrow[6] is null going into the first example then 
$myrow[6] will not be set to &npsp, but in the second example it will.  Shouldn't these two examples be equivalent?  Also strcmp function behaves like example 1.


EXAMPLE 1:

trim($myrow[6]);
($myrow[6]) == " " ? $myrow[6] = " ")

EXAMPLE 2:

trim($myrow[6]);
(ord($myrow[6]) == 32 ? $myrow[6] = " ");

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 [2002-04-12 11:11 UTC] sniper@php.net 
The bug system is not the appropriate forum for asking support
questions. For a list of a range of more appropriate places to ask
for help using PHP, please visit http://www.php.net/support.php
 [2002-04-12 11:16 UTC] lent at fstrf dot org 
I'm not asking a support question.

$myrow[6] is an empty string.

ord($myrow[6]) returns 32 (ascii for ' ')

the first character of an empty string shouldn't evaluate as ascii 32.  So this is a bug.
 [2002-04-12 11:32 UTC] sander@php.net 
$myrow[6] is not an empty string because you're trim()'ing the string incorrectly. See http://www.php.net/manual/en/function.trim.php
 
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