Bug #54187 [NEW]: unexpected results to comparing strings converted to floating

From: Operating system: Windows XP Professional SP3 PHP version: 5.3.5 Package: Scripting Engine problem Bug Type: Bug Bug description:unexpected results to comparing strings converted to floating Description: ------------ I have a strings with float numbers, in format integer.decimal (eg 916.32), and using operators (<,>,==,===) don't working as expecting. Additional info: System Windows NT WEBMASTER 5.1 build 2600 (Windows XP Professional Service Pack 3) i586 Build Date Jan 5 2011 20:26:24 Compiler MSVC9 (Visual C++ 2008) Architecture x86 Configure Command cscript /nologo configure.js "--enable-snapshot-build" "--disable-isapi" "--enable-debug-pack" "--disable- isapi"http://bugs.php.net/bugs-generating-backtrace.php "--without-mssql" "-- without-pdo-mssql" "--without-pi3web" "--with-pdo-oci=D:\php- sdk\oracle\instantclient10\sdk,shared" "--with-oci8=D:\php- sdk\oracle\instantclient10\sdk,shared" "--with-oci8-11g=D:\php- sdk\oracle\instantclient11\sdk,shared" "--enable-object-out-dir=../obj/" "-- enable-com-dotnet" "--with-mcrypt=static" precision 14 14 serialize_precision 100 100 PROCESSOR_ARCHITECTURE x86 PROCESSOR_IDENTIFIER x86 Family 6 Model 15 Stepping 13, GenuineIntel PROCESSOR_LEVEL 6 PROCESSOR_REVISION 0f0d Intel Core 2 Duo CPU E4500 @ 2.2Ghz Download from: http://windows.php.net/download/ Test script: --------------- echo "<pre>"; $string1 = "932.16"; $substring1 = "3.16"; $substring2 = "454"; $substring3 = "475"; $number2 = floatval(floatval($substring1) + floatval($substring2) + floatval($substring3)); $number1 = floatval($string1); var_dump($number1);//expected: float(932.16), current: float(932.16), OK var_dump($number2);//expected: float(932.16), current: float(932.16), OK var_dump($number1 < $number2);//expected: bool(false), current: bool(true), FAIL var_dump($number1 > $number2);//expected: bool(false), current: bool(false), OK var_dump($number1 == $number2);//expected: bool(true), current: bool(false), FAIL var_dump($number1 === $number2);//expected: bool(true), current: bool(false), FAIL var_dump(bccomp($number1,$number2));//expected: int(0), current: int(0), OK echo "</pre>"; Expected result: ---------------- float(932.16) float(932.16) bool(false) bool(false) bool(true) bool(true) int(0) Actual result: -------------- float(932.16) float(932.16) bool(true) bool(false) bool(false) bool(false) int(0) -- Edit bug report at http://bugs.php.net/bug.php?id=54187&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=54187&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=54187&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=54187&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=54187&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=54187&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=54187&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=54187&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=54187&r=needscript Try newer version: http://bugs.php.net/fix.php?id=54187&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=54187&r=support Expected behavior: http://bugs.php.net/fix.php?id=54187&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=54187&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=54187&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=54187&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=54187&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=54187&r=dst IIS Stability: http://bugs.php.net/fix.php?id=54187&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=54187&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=54187&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=54187&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=54187&r=mysqlcfg