Bug #77675 [NEW]: Floating Value Bug

From: joni dot ttv at gmx dot de Operating system: Debian, Mac OS PHP version: 7.2.15 Package: Math related Bug Type: Bug Bug description:Floating Value Bug Description: ------------ Hello, there is a problem when adding float values: If you add 76.50 + 15.96 + 7.54 the result ist 100.00. If you var_dump the sum the result is also 100.00. But when you compare the sum and 100.00 the result is that they are not equal. If you swap the last two numbers, the sum is correct and also the comparison. Test script: --------------- <?php // Prints 100 var_dump(76.50 + 15.96 + 7.54); // Prints false (should be true) var_dump((76.50 + 15.96 + 7.54) == 100.00); // Prints false (should be true) var_dump((76.50 + 15.96 + 7.54) == (76.50 + 7.54 + 15.96)); Expected result: ---------------- 100.00 true true Actual result: -------------- 100.00 false false -- Edit bug report at https://bugs.php.net/bug.php?id=77675&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77675&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77675&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77675&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77675&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77675&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77675&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77675&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77675&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77675&r=support Expected behavior: https://bugs.php.net/fix.php?id=77675&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77675&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77675&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77675&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77675&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77675&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77675&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77675&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77675&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77675&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77675&r=mysqlcfg