PHP. Руководство по PHP. 2005
variant_div
variant_div
Description
mixed variant_div (mixed left, mixed right)Divides left by right and
returns the result, subject to the following rules:
Таблица 1. 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 |
Замечание:
As with all the variant arithmetic functions, the parameters for this function
can be either a PHP native type (integer, string, floating point, boolean or
NULL), or an instance of a COM, VARIANT or DOTNET class. PHP native types
will be converted to variants using the same rules as found in the constructor
for the VARIANT class. COM and DOTNET objects
will have the value of their default property taken and used as the variant value.
The variant arithmetic functions are wrappers around the similarly named
functions in the COM library; for more information on these functions, consult
the MSDN library. The PHP functions are named slightly differently; for example
variant_add() in PHP corresponds to VarAdd() in the MSDN documentation.
