How to Fix the 'mysql_fetch_array(): supplied argument is not a valid MySQL result' Error?

Error: "Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result"

In the provided code, an error is encountered when attempting to call $connector->fetchArray($result) due to an invalid MySQL result. To resolve this issue, the following steps can be taken:

1. Verify Query Validity: Ensure that the query executed using $connector->query() produces a valid result. Inspect the return value of the query function and, if necessary, retrieve the error log using mysql_error().
2. Check Database Connection: Confirm that the connection to the database is established correctly in the DbConnector class. Verify that the correct database settings are provided and the connection is successfully made.
3. Revise FetchArray Function: As suggested in the error response, consider modifying the fetchArray function in the DbConnector class to improve error handling. Throwing an exception when encountering a bad query provides a more descriptive error message and simplifies debugging.

Here's an updated version of the fetchArray function:

function fetchArray($result) {
    if (!$result || mysql_errno()) {
        throw new Exception("Invalid MySQL result: ".$this->getQuery().".\nError: ".mysql_error());
    }
    return mysql_fetch_array($result);
}

By implementing these steps, the error related to the invalid MySQL result should be resolved, allowing the code to successfully retrieve and display the query results.

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