Bug->Doc #69226 [Opn]: FILTER_VALIDATE_FLOAT treats integers as floats

Edit report at https://bugs.php.net/bug.php?id=69226&edit=1 ID: 69226 User updated by: ianbytchek at gmail dot com Reported by: ianbytchek at gmail dot com Summary: FILTER_VALIDATE_FLOAT treats integers as floats Status: Open -Type: Bug +Type: Documentation Problem Package: Filter related Operating System: OS X 10.10.2 PHP Version: 5.6.6 Block user comment: N Private report: N New Comment: Sorry, I agree that float having a decimal point is about something else. Out of nowhere I got confused about it and was carried away having wrong ideas. My bad. > Well, I appreciate the current behavior. If the given value > validates as float, why not convert it to a float right away? This is a feature bug at best without the documentation :) I guess this is a good thing, alternatively we can use the original value, if we want it as string. http://fc04.deviantart.net/fs71/f/2011/315/f/7/f763312cf3b15d96718db268c39edebf-d2z0z5x.jpg Can documentation be updated where the returned value differs from original? I guess it's only integer and float? Boolean already mentions that the boolean is returned. http://php.net/manual/en/filter.filters.validate.php Previous Comments: ------------------------------------------------------------------------ [2015-03-17 21:51:40] cmbecker69 at gmx dot de IMO this is not a bug, because filter_var()'s behavior is well aligned with PHP's type juggling. Consider: var_dump((float) '10'); // double(10) > Floats are numbers with a floating point. No, at least not in the sense that a decimal mark has to be part of the string representation of a floating point number. Consider the example above, or: var_dump(1e2); // double(100) If you need to validate that a given input contains a decimal point, you could use FILTER_VALIDATE_REGEXP with an appropriate regex. > Also, why does filter convert value from string into an actual > number? Shouldn't that be done only by sanitize filters? Well, I appreciate the current behavior. If the given value validates as float, why not convert it to a float right away? ------------------------------------------------------------------------ [2015-03-12 00:06:47] ianbytchek at gmail dot com Description: ------------ I might be missing something here, but… Floats are numbers with a floating point. For example: ``` $x = 10; $x === (float) $x; // false (float) $x === (float) $x; // true ``` But FILTER_VALIDATE_FLOAT treats integers as floats. Both examples below must return false. ``` filter_var($x, FILTER_VALIDATE_FLOAT) // 10 filter_var('10', FILTER_VALIDATE_FLOAT) // 10 ``` Also, why does filter convert value from string into an actual number? Shouldn't that be done only by sanitize filters? ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=69226&edit=1