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# php_stream_is

(no version information, might be only in CVS)

php_stream_is -- Determines if a stream is of a particular type

## Description

int php_stream_is ( php_stream * stream, int istype )

php_stream_is() returns 1 if stream is of the type specified by istype, or 0 otherwise.

表格 44-1. Values 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 socket 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: 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: This function is implemented as a simple (and fast) pointer comparison, and does not change the stream state in any way.

See also php_stream_cast() and php_stream_can_cast().

后退 | 起点 | 前进
php_stream_is_persistent | 上一级 | php_stream_passthru