Олег Давидович: 1 версия импортирована

2024-10-18T06:37:52Z

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2024-07-01T08:33:39Z

French link

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The PHP setting '''max_input_vars''' determines how many input variables may be accepted (limit is applied to $_GET, $_POST and $_COOKIE superglobal separately). If there are more input variables than specified by this directive, an E_WARNING is issued, and further input variables are truncated from the request.

There are a lot of big or potentially big forms in Moodle, such as:
* Site administration tree search
* Editing roles
* Grading courses with big number of participants
* Large quizzes and quiz settings
The default value for max_input_vars in PHP is '''1000''', this is not enough for many cases.

If you are using PHP 7 the recommended value for the '''max_input_vars''' in Moodle is '''5000''' but you can still use Moodle with the lower value. Moodle code has a workaround that allows to submit the forms even with bigger limit however this workaround is not perfect. It is much better to increase the setting.

e.g. in Ubuntu 20.x, within /etc/php/7.4/apache2/php.ini, find this section and remove the comment (semi-colon) and edit the line to increase the size:

<nowiki>;</nowiki> How many GET/POST/COOKIE input variables may be accepted

<nowiki>;</nowiki>max_input_vars = 1000

'''max_input_vars = 5000'''

If you are using PHP 8 the minimum value of 5000 '''is required'''. By default PHP 8 sets to display startup errors (see [https://php.watch/versions/8.0/startup-errors-enabled]). This means that the warning about exceeding max_input_vars appears before the workaround even applied.

To change max_input_vars you can either set it in php.ini or modify it in runtime, for example for Apache you can create '''.htaccess''' file:
<code>
php_value max_input_vars 5000
</code>
[[Category:Environment|PHP]]
[[es:admin/environment/custom check/max input vars]]
[[fr:Environnement_-_max_input_vars]]

Environment - max input vars - История изменений

Олег Давидович: 1 версия импортирована

1>Fox: French link