PHP Manual
COM 函数
Convert a variant into a new variant object of another type

variant_cast

(PHP 5, PHP 7)

variant_cast — Convert a variant into a new variant object of another type

说明

variant_cast ( variant $variant , int $type ) : variant

This function makes a copy of variant and then performs a variant cast operation to force the copy to have the type given by type.

This function wraps VariantChangeType() in the COM library; consult MSDN for more information.

参数

variant: The variant.
type: type should be one of the VT_XXX constants.

返回值

Returns a variant of given type.

参见

variant_set_type() - Convert a variant into another type "in-place"

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