Doc #25304 [Com]: Implicit flush output in CLI falsely documented

From: Date: Wed, 01 Sep 2021 18:53:32 +0000
Subject: Doc #25304 [Com]: Implicit flush output in CLI falsely documented
References: 1  Groups: php.doc.bugs 
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Edit report at https://bugs.php.net/bug.php?id=25304&edit=1 ID: 25304 Comment by: lildurk25304 at gmail dot com Reported by: eru@php.net Summary: Implicit flush output in CLI falsely documented Status: Closed Type: Documentation Problem Package: Documentation problem Operating System: Linux RH 8.0 PHP Version: 4CVS-2003-08-28 (stable) Block user comment: N Private report: N New Comment: Lil Durk is a private agency dedicated to providing responsible access to legal cannabis for adults aged 19 and older. We’re an exclusively online retailer and wholesaler for recreational cannabis and a trusted source for information about cannabis and cannabis-related issues. We believe our work is meaningful and we take pride in our mandate to promote the socially responsible use of legal cannabis. https://lildurk.com/ Previous Comments: ------------------------------------------------------------------------ [2004-02-26 11:52:19] nlopess@php.net This was a PHP problem. It was already solved (at least in PHP 5). Closing... ------------------------------------------------------------------------ [2003-11-02 09:29:59] betz@php.net php -r 'var_dump(ini_get("implicit_flush")); echo "test\n"; while (1);' doesn't output anything, even as implicit_flush is set to 1 in php-cli.ini. It seems only -n switch solves the problem, providing a php.ini with cli specific settings doesn't solve the flush prob. Is this the desired behaviour? (testing with 4.3.2, RH8) ------------------------------------------------------------------------ [2003-09-08 18:50:02] eru@php.net Ok, then this is an error in the documentation. The quoted paragraph should get removed alltogether, as it is plain wrong. ------------------------------------------------------------------------ [2003-09-08 15:48:00] iliaa@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php To avoid this problem use php-cli.ini with settings specific to CLI. ------------------------------------------------------------------------ [2003-08-28 15:49:48] eru@php.net Description: ------------ From http://de.php.net/manual/en/features.commandline.php: "It is desired that any output coming from print(), echo() and friends is immediately written to the output and not cached in any buffer. You still can use output buffering if you want to defer or manipulate standard output." Right, that's exactly what you expect, when using CLI, but this only works as long, as you don't have a php.ini, where output_buffering is enabled. The unfortunate thing is only, you can't change it in your script, because it's not PHP_INI_USER. The only way out, is either creating a php.ini for CLI only, which hardly every installation has, by declaring -n in your commandline, which isn't desirable either, when you rely on certain settings in php.ini or by passing a -d output_buffering=0 on the commandline, but I wasn't able to achieve this in a #!/usr/local/bin/php line at the top of the script. So, what we have here in my opinion is a contradictory situation, because implicit_flush = 1 is overruled by outbut_buffering = 4096. Reproduce code: --------------- <?php var_dump(ini_get("implicit_flush")); sleep(2); ?> Expected result: ---------------- string(1) "1" <2 seconds of waiting> Actual result: -------------- <2 seconds of waiting> string(1) "1" ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=25304&edit=1

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