variant_and Performs a bitwise AND operation between two variants php函数


variant_and

(PHP 5)

variant_andPerforms a bitwise AND operation between two variants

说明

mixed variant_and ( mixed $left , mixed $right )

Performs a bitwise AND operation. Note that this is slightly different from a regular AND operation.

参数

left

The left operand.

right

The right operand.

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

Variant AND Rules
If left is If right is then the result is
TRUETRUETRUE
TRUEFALSEFALSE
TRUENULLNULL
FALSETRUEFALSE
FALSEFALSEFALSE
FALSENULLFALSE
NULLTRUENULL
NULLFALSEFALSE
NULLNULLNULL

参见

  • variant_or() - Performs a logical disjunction on two variants



相关阅读:
variant_cast Convert a variant into a new variant object of another type
variant_cat concatenates two variant values together and returns the result
variant_cmp Compares two variants
variant_date_from_timestamp Returns a variant date representation of a Unix timestamp
variant_date_to_timestamp Converts a variant date/time value to Unix timestamp
variant_div Returns the result from dividing two variants
variant_eqv Performs a bitwise equivalence on two variants
variant_fix Returns the integer portion of a variant
variant_get_type Returns the type of a variant object
variant_idiv Converts variants to integers and then returns the result from dividing them
variant_imp Performs a bitwise implication on two variants
variant_int Returns the integer portion of a variant
variant_mod Divides two variants and returns only the remainder
variant_mul Multiplies the values of the two variants
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