تفاوت نوع داده ای float با double در php

[Rezash]

بله فرقی ندارند !
پاسخ از stack :

There is no difference in PHP. float, double or real are the same datatype.

At the C level, everything is stored as a double.
The real size is still platform-dependent.

http://stackoverflow.com/a/3280965/877320