mkdir(): File exists

This is not a bug. At least not in this plugin.

The “@” error suppression operator is used to prevent this warning from being logged, as it is expected during normal operation. Query Monitor apparently does not respect this.

@kiboit Hi, thanks for the answer. https://www.php.net/manual/en/language.operators.errorcontrol.php – here it is stated that – quote
” Prior to PHP 8.0.0, it was possible for the?@?operator to disable critical errors that will terminate script execution. For example, prepending?@?to a call of a function which did not exist, by being unavailable or mistyped, would cause the script to terminate with no indication as to why. “

Is this somehow related to why Query Monitor ignores the @ operator ?

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As i understand we can ignore these errors caught by QM at frontend .

@kiboit I deactivated Query Monitor and instead used this snippet of code :

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

The warning doesn’t appear. Thanks.

That quote is about critical errors. This concerns a warning which is not a critical error.

It is up to custom error handling code, such as that implemented by Query Monitor, to respect error suppression. But something changed in PHP 8 that means that Query Monitor’s code needs to be updated in order to correctly detect suppressed errors.

I’ve left a note on Query Monitor’s support forum.

If they get around to updating this, it should make sure that these suppressed errors show up as such in Query Monitor.

@kiboit Thanks for the feedback !