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Warning: Unknown: Unable to create temporary file, Check permissions in temporary files directory. in Unknown on line 0 – Apache

Ubuntu 18.04.5 LTS
PHP 7.3.28
Apache/2.4.29

I am occasionally getting this error. It doesnt happen on every request, and when I fix the permissions and restart Apache it goes away for a bit. But, it always comes back after a short amount of time.

Warning: Unknown: Unable to create temporary file, Check permissions in temporary files directory. in Unknown on line 0

It is proving quite difficult to debug the problem, as it is a seemingly random issue and have not been able to find the root cause.

I would like to know if anyone has experienced anything similar, and what was done to resolve it.

I have increased the post_max_size and uncommented the sys_temp_dir values in my php.ini, but they have had no effect.

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2

Answers


  1. 0

    Check the path of the temporary folder you’re using and make sure the apache user can write into that folder.
    You can also try to create a new temporary directory owned by the apache user and configure php to write into it.

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  2. 0

    Add

    sys_temp_dir="/tmp"

    to php.ini file and restart Apache.

    Reference: https://github.com/guzzle/guzzle/issues/1363#issuecomment-173778434

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