Bug #68551 [Nab->Opn]: filter_var return false for (float) $integer if strlen($integer) > ini_get('prec

Edit report at https://bugs.php.net/bug.php?id=68551&edit=1 ID: 68551 Updated by: pajoye@php.net Reported by: frederic dot hardy at mageekbox dot net Summary: filter_var return false for (float) $integer if strlen($integer) > ini_get('prec -Status: Not a bug +Status: Open Type: Bug Package: Filter related Operating System: Linux/OSX PHP Version: 5.6.3 Block user comment: N Private report: N New Comment: Actually there are non sense inconsistencies here, due to the precision setting and conversion. Due to this, some dots may be accepted and other not if the length of the string representation of the value is bigger than the precision setting. This is a bug. Previous Comments: ------------------------------------------------------------------------ [2014-12-10 14:05:11] frederic dot hardy at mageekbox dot net Moreover, to be clear: <?php ini_set('precision', 2); $i = 100; var_dump(filter_var((float) $i, FILTER_VALIDATE_INT)); // bool(false) var_dump((float) $i == $i); // bool(true) ?> So, how a float can be equal to an integer if it's not an integer ? ------------------------------------------------------------------------ [2014-12-10 13:33:41] frederic dot hardy at mageekbox dot net Pierre just say me on IRC to add this script to illustrate the problem: <?php ini_set('precision', 2); var_dump(filter_var(1.0, FILTER_VALIDATE_INT)); // int(1) var_dump(filter_var(100.0, FILTER_VALIDATE_INT)); // bool(false) ?> So, filter_var(1.0, FILTER_VALIDATE_INT) should return false, as filter_var(100.0, FILTER_VALIDATE_INT), or filter_var(100.0, FILTER_VALIDATE_INT) should return int(100)... ------------------------------------------------------------------------ [2014-12-05 18:58:18] frederic dot hardy at mageekbox dot net So, filter_validate(1., FILTER_VALIDATE_INT) return (int) 1, but filter_validate(123456789123456., FILTER_VALIDATE_INT) return false, and it's not a bug. OK. All is right, we are in the PHP world! ------------------------------------------------------------------------ [2014-12-05 14:44:38] ajf@php.net (Though I agree it's pretty weird behaviour, FILTER_VALIDATE_INT could seriously be improved. Still, it's not actually a bug.) ------------------------------------------------------------------------ [2014-12-05 14:43:45] ajf@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php filter_var's FILTER_VALIDATE_INT always casts its argument to a string before conversion, and exponents and decimal points are never accepted, this is no exception. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=68551 -- Edit this bug report at https://bugs.php.net/bug.php?id=68551&edit=1