How to check the data for a match?

D

Denis Davidov2020-06-01 23:36:03

PHP

Denis Davidov, 2020-06-01 23:36:03

The fact is that you need to check the cell field before adding it to the database.
If such a field already exists, then let it exist, but do not add a new one, and if the field does not exist, then add it.

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