How can the INSERT query be properly placed within the IF condition to prevent empty database entries?

To prevent empty database entries when using an INSERT query within an IF condition, you can check if the input data is not empty before executing the query. This can be done by validating the input data and only executing the INSERT query if the data is not empty. By implementing this check, you can ensure that only valid data is inserted into the database.

// Validate input data
if(!empty($input_data)) {
    // Execute INSERT query
    $sql = "INSERT INTO table_name (column1, column2) VALUES ('$value1', '$value2')";
    if(mysqli_query($conn, $sql)) {
        echo "Record inserted successfully";
    } else {
        echo "Error inserting record: " . mysqli_error($conn);
    }
} else {
    echo "Input data is empty";
}