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# stream_set_blocking

(PHP 4 >= 4.3.0, PHP 5)

stream_set_blocking -- Set blocking/non-blocking mode on a stream

## Description

bool stream_set_blocking ( resource stream, int mode)

If mode is `FALSE`, the given stream will be switched to non-blocking mode, and if `TRUE`, it will be switched to blocking mode. This affects calls like fgets() and fread() that read from the stream. In non-blocking mode an fgets() call will always return right away while in blocking mode it will wait for data to become available on the stream.

成功回傳`TRUE`失敗回傳`FALSE`。

This function was previously called as set_socket_blocking() and later socket_set_blocking() but this usage is deprecated.

> 備注: Prior to PHP 4.3, this function only worked on socket based streams. Since PHP 4.3, this function works for any stream that supports non-blocking mode (currently, regular files and socket streams).

See also stream_select().

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