Are there any best practices or guidelines for handling MySQL result resources in PHP to prevent errors like "supplied argument is not a valid MySQL result resource"?

When working with MySQL result resources in PHP, it's important to check if the result resource is valid before using it in your code to prevent errors like "supplied argument is not a valid MySQL result resource." One way to handle this is by using the `mysql_num_rows()` function to check if the result resource is valid before fetching data from it. 

// Check if the result resource is valid before using it
if ($result && mysql_num_rows($result) > 0) {
    // Fetch data from the result resource
    while ($row = mysql_fetch_assoc($result)) {
        // Process the data
    }
} else {
    // Handle the case where the result resource is not valid
    echo "No results found.";
}

Keywords

MySQL result resources PHP error handling valid MySQL result resource

Related Questions