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variant_and

variant_and

(PHP 5)

variant_and --  performs a bitwise AND operation between two variants and returns the result

Description

mixed variant_and ( mixed left, mixed right )

Performs a bitwise AND operation, according to the following truth table; note that this is slightly different from a regular AND operation.

Table 1. Variant AND Rules

If left is If right is then the result is
TRUE TRUE TRUE
TRUE FALSE FALSE
TRUE NULL NULL
FALSE TRUE FALSE
FALSE FALSE FALSE
FALSE NULL FALSE
NULL TRUE NULL
NULL FALSE FALSE
NULL NULL NULL


See also variant_or().

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.

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