variant_set_type() - com组件

百变鹏仔12个月前 (11-21)阅读数 17#技术干货

variant_set_type()

(PHP 5, PHP 7)

Convert a variant into another type "in-place"

说明

variant_set_type(variant$variant,int $type): void

This function is similar to variant_cast() except that the variant is modified "in-place"; no new variant is created. The parameters for this function have identical meaning to those of variant_cast().

参数

$variant

The variant.

$type

返回值

没有返回值。

参见

variant_cast()Convert a variant into a new variant object of another type
variant_get_type()Returns the type of a variant object

In my application I was using ADODB to retrieve data from Microsoft Access. During queries, fields defined as "Date/Time" in Access were being returned to PHP as instances of the Variant class.
For some reason, the variant_date_to_timestamp function returned incorrect timestamps. As a workaround, I used variant_set_type($variant, VT_BSTR) to get a string representation of the date. This can be used for most variant types PHP doesn't handle.

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