Why Am I Getting a 'mysql_fetch_array(): supplied argument is not a valid MySQL result' Error?

"Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result [duplicate]"

This error arises when attempting to retrieve data from a MySQL query using the mysql_fetch_array() function while providing an invalid result resource.

In your specific case, the issue may stem from a faulty query. After executing your query with the $connector->query() method, check for any errors using mysql_error().

If your query is valid, another possibility to consider is a problem with your DbConnector class, particularly the fetchArray() function. Ensure it is correctly defined as follows:

function fetchArray($result) {
    return mysql_fetch_array($result);
}

To enhance error handling, consider modifying the query() method in your DbConnector class to throw an exception when an invalid query is encountered:

function query($query) {
    $this->theQuery = $query;
    $queryId = mysql_query($query, $this->link);
    if (!$queryId) {
        throw new Exception(mysql_error() . ".  Query was:\n\n" . $query . "\n\nError number: " . mysql_errno());
    }
    return $queryId;
}

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