You have installed an error handler to ignore all bugs that may occur. So it looks like no bugs happen. But this is not true. Every call produces at least 600 errors.
Most of them "Undefined array key" - but this SHOULD be fixed, not IGNORED!
These don't cause any problems so they are not really bugs. PHP just decided to report something that might be a problem (but it is not in the case of Adminer).
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It is, if you attach another error handler to monitor for bugs.
And accessing an array-element which is not present is an error. and can be easily solved, just by checking empty() or isset()
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
These don't cause any problems so they are not really bugs. PHP just decided to report something that might be a problem (but it is not in the case of Adminer).
It is, if you attach another error handler to monitor for bugs.
And accessing an array-element which is not present is an error. and can be easily solved, just by checking empty() or isset()