What are some best practices for writing conditional statements in PHP to ensure proper comparison of values from a database?

When writing conditional statements in PHP to compare values from a database, it is important to ensure that the comparison is done correctly to avoid unexpected results. One common mistake is comparing values using the assignment operator (=) instead of the comparison operator (== or ===). To ensure proper comparison, always use the comparison operators and consider the data types being compared. Example PHP code snippet:

// Retrieve a value from the database
$valueFromDatabase = $row['column_name'];

// Compare the retrieved value with a constant
if ($valueFromDatabase == 'expected_value') {
    // Perform some action
    echo 'The value matches the expected value.';
} else {
    // Perform a different action
    echo 'The value does not match the expected value.';
}