PHP math commonly used functions

In PHP programs, data processing operations are often required, which requires the use of mathematical functions. Mathematical functions are the simplest and most commonly used system functions. This chapter takes mathematical functions as an example to explain how to call system functions.

Let’s talk about our most commonly used mathematical functions now. Before explaining mathematical functions, let's talk about one thing. That's it - PHP has a lot of counting functions, as shown in the following link screenshot:

You don't need to master all of these. You will know that there are so many mathematical functions in PHP for you after reading them. That’s it. When needed in the future, just use it directly.

You only need to remember the most commonly used ones. I will give you a list of the most commonly used ones:

##mt_rand()More Good random numberecho mt_rand(0,9);//nMinimum/maximum, random numberRandomly returns a value within the rangerand()Random numberecho rand()Minimum/maximum, random numberRandomly returned within the range The valuepi()Get the pi valueecho pi(); // 3.1415926535898NoneGet piNext Section

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Function name	Description	Example	Input	Output
abs()	Request Absolute value	$abs = abs(-4.2); //4.2	Number	Absolute value number
ceil( )	Round to an integer	echo ceil(9.999); // 10	Floating point number	Round to an integer
floor()	Truncation and rounding	echo floor(9.999); // 9	Floating point number	Directly discard the decimal part
fmod()	Floating point number remainder	"$x = 5.7;$y = 1.3;$r = fmod($x, $y);// $r equals 0.5, because 4 * 1.3 + 0.5 = 5.7 "	Two floating point numbers, x>y	Floating point remainder
pow()	Returns the nth power of the number	echo pow(-1, 20); // 1	Basic Number nth power	Power value
round()	Floating point number rounding	echo round(1.95583, 2) ;// 1.96	A numerical value	How many digits to keep after the decimal point, the default is 0. The rounded result
sqrt()	Find the square root	echo sqrt(9); //3	The number that is the square root	square root
max()	Find the maximum value	"echo max(1, 3, 5, 6, 7); // 7 echo max(array(2, 4, 5)); / / 5"	Multiple numbers or arrays	Return the maximum value
min()	Find the minimum value	min	Multiple numbers or arrays	Return the minimum value