variant_neg Performs logical negation on a variant


variant_neg

(PHP 5)

variant_negPerforms logical negation on a variant

说明

mixed variant_neg ( mixed $variant )

Performs logical negation of variant.

参数

variant

The variant.

Note:

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.

返回值

Returns the result of the logical negation.


«  variant_mul
» variant_not
快速导航

Copyright © 2016 phpStudy | 皖ICP备18014864号-4