mirrors/phpv8
mirrors/phpv8
0
0
Fork 0
mirror of https://github.com/phpv8/v8js.git synced 2024-12-22 18:41:52 +00:00
Code Releases Activity

Mention integer precission differences, closes #295

Browse Source
This commit is contained in:
Stefan Siegl 2017-03-11 13:24:20 +01:00 committed by GitHub
parent 8bc4cd6266
commit 9a149fcd08
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
README.md
View File

@ -322,6 +322,17 @@ $v8->executeString('PHP.foo.__call("bar", ["function"]);');
Mapping Rules Mapping Rules
============= =============
PHP and JavaScript data types don't match exactly. This is of course both languages have
data types to handle numbers. Yet PHP differentiates between integers and floating point
numbers contrary JavaScript only has a type `Number`, which is a IEEE 754 floating point
number. In many cases this doesn't matter at all, when both languages can represent the
same number well. However there are edge cases.
On 64-bit systems PHP allows integers to have 64 significant bits, JavaScripts number type
(i.e. IEEE 754) however has 52 bit mantissa only. Hence some precission will be lost. This
starts to matter if you pass around integer values with more then 15 accurate decimal digits.
Native Arrays Native Arrays
------------- -------------