php_stream_is()
returns 1 if
stream
is of the type specified by
istype
, or 0 otherwise.
表 43-1Values for
istype
Value | Meaning |
---|---|
PHP_STREAM_IS_STDIO | The stream is implemented using the stdio implementation |
PHP_STREAM_IS_SOCKET | The stream is implemented using the network stream implementation |
PHP_STREAM_IS_USERSPACE | The stream is implemented using the userspace object implementation |
PHP_STREAM_IS_MEMORY | The stream is implemented using the grow-on-demand memory stream implementation |
注意 The PHP_STREAM_IS_XXX "constants" are actually defined as pointers to the underlying stream operations structure. If your extension (or some other extension) defines additional streams, it should also declare a PHP_STREAM_IS_XXX constant in it's header file that you can use as the basis of this comparison.
注意 This function is implemented as a simple (and fast) pointer comparision, and does not change the stream state in any way.
See also
php_stream_cast()
and
php_stream_can_cast()
.