|
Последние активные темы форума |
|
variant_add
(PHP 5) variant_add --
"Adds" two variant values together and returns the result
Descriptionmixed variant_add ( mixed left, mixed right ) Adds left to right using
the following rules (taken from the MSDN library), which correspond to
those of Visual Basic:
Таблица 1. Variant Addition Rules If | Then |
---|
Both expressions are of the string type | Concatenation | One expression is a string type and the other a
character | Addition | One expression is numeric and the other is a string | Addition | Both expressions are numeric | Addition | Either expression is NULL | NULL is returned | Both expressions are empty | Integer subtype is returned |
Смотрите также variant_sub().
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.
|