The mysql_errno() function returns the error number of the last MySQL operation.
This function returns 0 (zero) if no error has occurred.
|connection||Optional. Specifies the MySQL connection. If not specified, the last connection opened by mysql_connect() or mysql_pconnect() is used.|
In this example we will try to log on to a MySQL server with the wrong username and password:
The output of the code above could be:
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