Returns the result from dividing two variants

说明

variant_div ( mixed $left , mixed $right ) : variant

Divides left by right and returns the result.

参数

left: The left operand.
right: The right operand.

Note:
对于所有变量运算函数，本函数的参数可以是 PHP 内置的类型（整数，字符串，浮点数，布尔型或者 NULL），或者是一个 COM，VARIANT 或者 DOTNET 类的实例。PHP 内置类型将会使用和构造variant类相同的规则转换成变量。COM 和 DOTNET 对象的值将会取其默认属性并被当成变量值使用。

变量运算函数是同名函数在 COM 库中的外包；有关此类函数的更多信息参见 MSDN 库。PHP 函数命名有少许区别，例如 PHP 中的 variant_add() 对应于 MSDN 文档中的 VarAdd()。

返回值

**Variant Division Rules**
If	Then
Both expressions are of the string, date, character, boolean type	Double is returned
One expression is a string type and the other a character	Division and a double is returned
One expression is numeric and the other is a string	Division and a double is returned.
Both expressions are numeric	Division and a double is returned
Either expression is NULL	NULL is returned
`right` is empty and `left` is anything but empty	A com_exception with code `DISP_E_DIVBYZERO` is thrown
`left` is empty and `right` is anything but empty.	0 as type double is returned
Both expressions are empty	A com_exception with code `DISP_E_OVERFLOW` is thrown

错误／异常

Throws a com_exception on failure.

参见

variant_idiv() - Converts variants to integers and then returns the result from dividing them