What is the difference between number_format and round functions in PHP?

The number_format function in PHP is used to format a number with grouped thousands and decimal points, while the round function is used to round a number to a specified number of decimal places. If you want to simply round a number without formatting it, you should use the round function. If you want to format a number with specific decimal places and thousands separator, you should use the number_format function.

// Using round function
$number = 1234.56789;
$roundedNumber = round($number, 2);
echo $roundedNumber; // Output: 1234.57

// Using number_format function
$number = 1234.56789;
$formattedNumber = number_format($number, 2);
echo $formattedNumber; // Output: 1,234.57