PHP. Руководство по PHP. 2005
variant_xor
variant_xor
Description
mixed variant_xor (mixed left, mixed right)
Performs a logical exclusion, according to the following truth table:
Таблица 1. Variant XOR Rules
| If left is | If right is | then the result is |
|---|---|---|
| TRUE | TRUE | FALSE |
| TRUE | FALSE | TRUE |
| FALSE | TRUE | TRUE |
| FALSE | FALSE | FALSE |
| NULL | NULL | NULL |
See also variant_and(), variant_or().
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.
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Отвечу на любые вопросы. С уважением, Дмитрий Владимирович.
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