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Clarify Process::wait() callback behaviour #7099

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Clarify Process::wait() callback behaviour #7099

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a352164
Clarify Process::wait() callback behaviour
Lilchef Oct 28, 2016
5629fc8
Made comment in wait() example consistent with previous ones
Lilchef Nov 1, 2016
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23 changes: 17 additions & 6 deletions components/process.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -132,7 +132,24 @@ are done doing other stuff::
$process->start();

// ... do other things

$process->wait();

// ... do things after the process has finished

.. note::

The :method:`Symfony\\Component\\Process\\Process::wait` method is blocking,
which means that your code will halt at this line until the external
process is completed.

:method:`Symfony\\Component\\Process\\Process::wait` takes one optional argument:
a callback that is called repeatedly whilst the process is still running, passing
in the output and its type::

$process = new Process('ls -lsa');
$process->start();

$process->wait(function ($type, $buffer) {
if (Process::ERR === $type) {
echo 'ERR > '.$buffer;
Expand All @@ -141,12 +158,6 @@ are done doing other stuff::
}
});

.. note::

The :method:`Symfony\\Component\\Process\\Process::wait` method is blocking,
which means that your code will halt at this line until the external
process is completed.

Streaming to the Standard Input of a Process
--------------------------------------------

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