What potential issue should be considered when iterating through a result set in PHP and accessing specific values?

One potential issue to consider when iterating through a result set in PHP and accessing specific values is the possibility of encountering null or undefined values. To avoid errors, it's important to check if the value exists before trying to access it. This can be done using isset() or empty() functions to ensure that the value is not null or undefined before accessing it. 

// Example code snippet to iterate through a result set and access specific values safely
foreach ($result_set as $row) {
    if (isset($row['specific_value'])) {
        $specific_value = $row['specific_value'];
        // Do something with $specific_value
    } else {
        // Handle the case where the specific value is not set
    }
}

Keywords

MySQLi fetch_assoc NULL values data types error handling

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