php – Como tratar exceção lançada “Integrity constraint violation: Cannot delete or update a parent row: a foreign key constraint fails”?

Question:

I use the PDO class to communicate with the banco de dados and I don't know a good way to catch this exceção .

I PDOException a class that extends PDOException but I couldn't find it.

I can do a query before deleting, that works, but would you like to handle when the exception is thrown, or is this not the best way?

Answer:

There are cases where the getCode() does not return the correct code.

In this case I use:

try {
   ....
} catch (PDOException $e) {
   if (isset($e->errorInfo[1]) && $e->errorInfo[1] == '1451') {
      print 'mensagem';
   }
}