What common errors can occur when using the mysqli_fetch_row() function in PHP?

One common error that can occur when using the mysqli_fetch_row() function in PHP is trying to access the fetched row data without checking if there are any more rows left to fetch. This can lead to errors such as trying to access data from a non-existent row, resulting in a null value or an error message. To solve this issue, it is important to always check if there are more rows to fetch before trying to access the data. 

// Connect to the database
$conn = mysqli_connect("localhost", "username", "password", "database");

// Perform a query
$result = mysqli_query($conn, "SELECT * FROM table");

// Check if there are more rows to fetch
if(mysqli_num_rows($result) > 0) {
    // Fetch row data
    while($row = mysqli_fetch_row($result)) {
        // Access and process the fetched data
        // For example:
        echo $row[0] . " - " . $row[1] . "<br>";
    }
} else {
    echo "No rows found.";
}

// Close the connection
mysqli_close($conn);

Keywords

mysqli_fetch_row PHP errors database data retrieval

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