PHP中的float和double之间的区别?

问题描述：

我有这个代码

$vad = 1.1;

print gettype($vad);

var_dump($vad);

这将输出:

double
float(1.1)

所以它在php中是double还是float?

So it is double or float in php?

答

PHP没有区别. float，double或real是相同的数据类型.

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

在C级别，所有内容都存储为double.
实际大小仍然取决于平台.

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

See the manual for more details:
http://www.php.net/manual/en/language.types.float.php