#44477 [Opn->Bgs]: 1990!=1990

ID: 44477 Updated by: scottmac@php.net Reported By: ppalka3 at abacus dot pl -Status: Open +Status: Bogus Bug Type: *General Issues Operating System: linux PHP Version: 5.2.5 New Comment: Floating point values have a limited precision. Hence a value might not have the same string representation after any processing. That also includes writing a floating point value in your script and directly printing it without any mathematical operations. If you would like to know more about "floats" and what IEEE 754 is, read this: http://docs.sun.com/source/806-3568/ncg_goldberg.html Thank you for your interest in PHP. Previous Comments: ------------------------------------------------------------------------ [2008-03-19 12:18:42] ppalka3 at abacus dot pl Description: ------------ PHP Version 5.2.4 System Linux test2 2.6.19 #7 SMP PREEMPT Sun Dec 17 22:01:07 CET 2006 i686 Build Date Oct 16 2007 15:19:41 Configure Command './configure' '--prefix=/usr/PHP5' '--with-config-file-path=/usr/PHP5' '--sysconfdir=/usr/PHP5' '--enable-track-vars' '--with-libxml-dir=/usr/include/libxml2' '--with-xml' '--enable-xslt' '--with-mysql=/usr/MYSQL_5.0.45' '--with-mysql-sock=/tmp/mysql.sock' '--with-iconv' '--with-jpeg-dir=/usr/lib/' '--enable-mbstring' '--enable-ftp' '--with-gd' '--with-zlib' '--with-gettext' '--enable-safe-mode' '--with-curl=/usr/local/include/curl' '--with-apxs=/usr/Apache/bin/apxs' '--with-mcrypt' '--with-imap=/usr/local/src/imap-2006k/' '--without-krb5' Reproduce code: --------------- $pay=19.90; $pay_grosze=$pay*100; $zaplacono=1990; if($zaplacono!=$pay_grosze) { echo $zaplacono."!=".$pay_grosze; }else { echo $zaplacono."=".$pay_grosze; } Expected result: ---------------- 1990=1990 Actual result: -------------- 1990!=1990 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=44477&edit=1