How can the use of while loops in PHP impact the output of data from a database query?

When using while loops in PHP to fetch data from a database query, it is important to ensure that the loop iterates over each row of the result set until there are no more rows left. Failure to do so may result in incomplete or missing data being displayed. To prevent this issue, always use the fetch method within the loop to fetch each row of data until there are no more rows left. 

// Assuming $conn is the database connection and $query is the SQL query
$result = $conn->query($query);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        // Output data from each row
        echo "ID: " . $row["id"] . " - Name: " . $row["name"] . "<br>";
    }
} else {
    echo "0 results";
}

Keywords

while loop PHP database query output impact

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