Floats incorrectly serialized to xml

[peterlozano]

After an upgrade from 1.14.1 to 3.11.0, float values were not serialized correctly.

For example:
348.47 was serialized to xml as 348.46999999999997

I'm using PHP 7.2.23

It seems var_export may format floats this way for some reason:

serializer/src/XmlSerializationVisitor.php

Line 182 in f91971c

return $this->document->createTextNode(var_export((float) $data, true));

See:

• https://stackoverflow.com/questions/32149340/php-var-export-fails-with-float

[zeldi-dev]

I am experiencing the same issue after upgrading to v3.
Is there any workaround or plan to change the behaviour?

[goetas]

an option would be to introduce a "precision" parameter to float numbers.... something linke float<1> could serialize 348.47 into 348.5

[machinateur]

Hello everyone,

I've experienced the same problem earlier today and could not find any information on how to format float values in the docs or elsewhere. I ended up using round() to fix it (hopefully, I haven't been able to test it properly).

Also, I'm unable to reproduce the results described by @peterlozano on 3v4l cutting the middleman and directly giving the float to var_export(). So I can't even reproduce the behavior I was getting myself... Am I missing something?

Best regards

[goetas]

an option would be to introduce a "precision" parameter to float numbers.... something linke float<1> could serialize 348.47 into 348.5

it would be great if someone could send a PR with such improvement

[re2bit]

And here it is ;)

[goetas]

done in #1359