Bug #14382 Updated: sprintf function doesn't print correct results

From: Date: Mon, 24 Dec 2001 15:08:54 +0000
Subject: Bug #14382 Updated: sprintf function doesn't print correct results
References: 1  Groups: php.dev 
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ID: 14382
Updated by: sander
Reported By: jiri.kaderavek@webstep.net
Old Status: Open
Status: Feedback
Bug Type: Variables related
Operating System: Debian GNU/Linux
PHP Version: 4.1.0
New Comment:

Can you provide a _self-contained_ sample script which reproduces the problem.

BTW: $X = 1.22; is not bad syntax. It's just the way you represent decimal values in PHP, no
matter what the current locale is.

Previous Comments:
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[2001-12-11 08:41:41] jiri.kaderavek@webstep.net




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[2001-12-11 08:38:45] jiri.kaderavek@webstep.net

This is the problem of syntax checking and locale settings.
This script print a warning:

setlocale(LC_ALL, "en_US");  // US have a decimal pointer
$X = 1,22;                   // !!! bad syntax 

This script doesn't print a warning:

setlocale(LC_ALL, "cs_CZ"); // CZ have a decimal comma
$X = 1.22;                  // !!! also bad syntax

The error caused by incorrect parsing of a float number is propagated into the next script lines and
cause a false alerts in a many situations. When the variable is parsed as a string


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[2001-12-07 13:47:35] jiri.kaderavek@webstep.net

Sometimes (1-10 times a day) appears a fatal bug
in my php code. Sometime this sprintf expression returns me string like '0.05-0%':

<?echo
$rs["pol_sazbadph"]."-".sprintf("%1.0f",$rs["pol_sazbadph"]
* 100)."%"?>

This bug appears to me on two different servers:

1) Athlon based 2.4.12-k6 kernel - Apache/1.3.22 - php 4.1.0 RC3

 './configure' '--prefix=/usr' '--with-apxs=/usr/bin/apxs'
'--with-config-file-path=/ etc/php4/apache'
'--with-ibm-db2=/home/db2inst1/sqllib' 

2) Pentium II based - 2.2.19pre17 kernel - Apache/1.3.9 - 
php 4.0.3pl1

'./configure' '--prefix=/usr' '--with-apxs=/usr/bin/apxs'
'--with-regex=system' '--with- config-file-path=/etc/php4/apache'
'--with-db2' '--with-zlib' '--without-pgsql' '--
disable-static' '--with-layout=GNU' '--with-zlib-dir=/usr'
'--with-mysql=shared,/usr' '-- with-ibm-db2=/home/db2inst1/sqllib'

The bug appears after we have compiled php against db2 libraries. I've found another bug in
sprintf with the same frequency of appearance in bugs database. There is something bad in sprintf in
some cases, but what?



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