What are best practices for handling MySQL query results in PHP to avoid missing data in while loops?

When handling MySQL query results in PHP, it's important to check if there are any rows returned before attempting to fetch data in a while loop. This can help avoid missing data if the query returns an empty result set. One way to do this is by using the mysqli_num_rows() function to determine if there are any rows to fetch. 

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

// Check if there are rows to fetch
if(mysqli_num_rows($result) > 0) {
    // Fetch data in a while loop
    while($row = mysqli_fetch_assoc($result)) {
        // Process the data
    }
} else {
    // Handle case where no data is returned
    echo "No data found";
}

Keywords

MySQL PHP query results while loops missing data

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