What are the potential reasons for database entries being output twice in PHP scripts?

The potential reasons for database entries being output twice in PHP scripts could be due to inadvertently looping through the results twice, using incorrect query logic, or having duplicate entries in the database. To solve this issue, ensure that you are only looping through the results once and double-check your query logic to avoid fetching duplicate entries.

// Example PHP code snippet to prevent database entries from being output twice

// Perform database query
$query = "SELECT * FROM your_table";
$result = mysqli_query($connection, $query);

// Check if there are results
if(mysqli_num_rows($result) > 0) {
    // Loop through the results and output them
    while($row = mysqli_fetch_assoc($result)) {
        // Output the data here
    }
} else {
    echo "No results found.";
}