On Windows this function does not work with pipes opened with proc_open (https://bugs.php.net/bug.php?id=47918, https://bugs.php.net/bug.php?id=34972, https://bugs.php.net/bug.php?id=51800)
(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
stream_set_blocking — Configura el modo de bloqueo de un flujo
stream_set_blocking() configura el modo de bloqueo
del flujo stream.
Esta función funciona para todos los flujos que soportan el modo no bloqueante (actualmente, los ficheros y los flujos de sockets).
streamEl flujo.
enable
Si enable vale false,
stream se configurará en modo no bloqueante,
y si vale true, stream se configurará en
modo bloqueante. Esta llamada afecta a las funciones tales como
fgets() y fread()
que leen en flujos. En modo no bloqueante, la función
fgets() se ejecuta justo después de su llamada, mientras
que en modo bloqueante, esperará datos.
Nota:
Esta función no tiene efecto para los ficheros locales bajo Windows. El modo no bloqueante no está soportado bajo Windows.
On Windows this function does not work with pipes opened with proc_open (https://bugs.php.net/bug.php?id=47918, https://bugs.php.net/bug.php?id=34972, https://bugs.php.net/bug.php?id=51800)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.