Format Number to 2 Decimal Places in PHP

Using the round() function

To format a number to 2 decimal places in PHP, you can use the round() function and pass the number and 2 as arguments to the round() function.

Here is an example of how to use the round() function to format a number to 2 decimal places:

Output
3.14

round() function accepts a number and the number of decimal places to round to as arguments, and it returns the rounded number as a float. 
Using the number_format() function
To format a number to 2 decimal places in PHP, you can use the number_format() function. number_format() formats number with specified decimal places.
Here is an example of how to use the number_format function to format a number to 2 decimal places:
$number = 3.14159;

// Use the number_format function to format the number
$formatted = number_format($number, 2, '.', '');

// Output the formatted number
echo $formatted; // 3.14

Output
3.14

We used number_format() to format number to 2 decimal places in PHP.
number_format() function accepts 4 arguments:

the number to format,
the number of decimal places to include, and
the decimal point character to use.
thousand separator which is not applicable here.

Use sprintf() function
To format a number to 2 decimal places in PHP, you can also use the sprintf() function and use the format string "%0.2f".
Here is an example of how to use the sprintf function to format a number to 2 decimal places:

Output
3.14

sprintf() function accepts a format string as its first argument, and it formats the numbers that are passed as subsequent arguments according to the specified format. 
Use the floatval and number_format function
To format a number to 2 decimal places in PHP, you can also use the number_format() function in combination with the floatval() function.
You can first convert the number to a string using the floatval() function, and then use the number_format() function to format the string to 2 decimal places.
Here is an example of how to use the floatval() and number_format() functions to format a number to 2 decimal places:

Output
3.14

That's all about how to format number to 2 decimal places in PHP.