PHP: stream_set_blocking - Manual

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stream_set_timeout stream_select

Last updated: Fri, 26 Jan 2007

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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 0, the given stream will be switched to non-blocking mode, and if 1, 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.

Возвращает `TRUE` в случае успешного завершения или `FALSE` в случае возникновения ошибки.

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

> Замечание: 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().

add a note User Contributed Notes
stream_set_blocking
galvao at galvao dot eti dot br
15-Dec-2006 08:58
`Please notice that this function will not work as for PHP 5.2.0 at least on Win32 systems. It probably won't work on Linux boxes either.
PHP just ignores the function and blocking remains active.
For more information take a look at Bug #36918.`
MagicalTux at ookoo dot org
07-Sep-2006 11:13
`When you use fwrite() on a non-blocking stream, data isn't discarded silently as t dot starling said.
Remember that fwrite() returns an int, and this int represents the amount of data really written to the stream. So, if you see that fwrite() returns less than the amount of written data, it means you'll have to call fwrite() again in the future to write the remaining amount of data.
You can use stream_select() to wait for the stream to be available for writing, then continue writing data to the stream.
Non-blocking streams are useful as you can have more than one non-blocking stream, and wait for them to be available for writing.`
t dot starling at physics dot unimelb dot edu dot au
08-Sep-2005 04:02
`Warning: if you write too much data to a stream in non-blocking mode and fill the buffer, the excess will be silently discarded. Observed in PHP 4.4.0 under linux.`
add a note
stream_set_timeout stream_select

Last updated: Fri, 26 Jan 2007
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