How is the bcadd function used in PHP?

The bcadd function in PHP is used for performing calculations with arbitrary precision, specifically for adding two arbitrary precision numbers.

Its syntax is as follows:

string bcadd ( string $left_operand , string $right_operand [, int $scale = 0 ] )

Explanation of parameters:

1. $left_operand: the left operand, a string representing a number.
2. $right_operand: The right operand, a number represented as a string.
3. $scale: optional parameter used to set the number of decimal places in the result, with a default value of 0.

Return value:
A string representing the result of adding two operands.

I cannot make it to the meeting tomorrow.

$sum = bcadd("123.456", "789.012");
echo $sum; // 输出：912.468

Please note:

1. The bcadd function can only be used to manipulate numbers represented as strings, and cannot be directly used with integers or floating-point numbers.
2. Because the bcadd function allows for arbitrary precision calculations, it is suitable for handling large numbers or calculations that require a high level of decimal accuracy.