RE: [PHP-DEV] Float comparison

On Sun, 4 May 2008, Jonathan Bond-Caron wrote: > Thanks, I made some tests after looking at > http://lxr.php.net/source/php-src/main/spprintf.c#712 > > At first glance, I am utterly confused, > > ini_set('precision', 100); > setlocale(LC_ALL, 'fr_FR.UTF-8'); > echo 0.3; // 0,299999999999999988897769753748434595763683319091796875 > echo "\n"; > echo (string)0.3; // 0.3 > // expected: 0,3 > echo "\n"; > echo (float)(string)0.3; // 0,299999999999999988897769753748434595763683319091796875 > // expected: 0,3 Expected should be "0" here actually: (string) 0.3 -> converts to "0,299999999999999988897769753748434595763683319091796875". (float) "0,299999999999999988897769753748434595763683319091796875" -> converts to 0. I get the following output with both PHP 5.2.6: 0,299999999999999988897769753748434595763683319091796875 0,299999999999999988897769753748434595763683319091796875 0 0,3 Which is what I would expect. regards, Derick -- Derick Rethans http://derickrethans.nl | http://ezcomponents.org | http://xdebug.org