Math's function in PHP that allows you to perform math's task.
Some functions are as follows:
1) Base_convert() = its allows you to convert base number in any
base numbers and hexadecimal number, binary number, octal
number etc.

2) Pi() = pi functions returns a PI values.
Example: echo (PI()); 
//output: 3.1415

3) Max() = max function returns a highest value in the data.
Example: echo (max(20, 32, -93, 35)); 
//output: 35

4) MIN() = min function returns a lower value in the data.
Example: echo (min(20, 32, -93, 35)); 
//output: -93

5) Abs() = abs function returns a positive numbers of the value.
Example: echo (abs(-10.5)); 
//output: 10.5

6) Sqrt() = sqrt function returns a square root of the numbers.
Example: echo (sqrt(25)); 
//output: 5

7) Round() = round function returns a floating points numbers.
Example: echo (round(0.70)); 
//output: 1

8) Rand() = random function generate any randomly numbers.
Example: echo (rand()); 
//output: 7278382