PHP Math
PHP pi() Function
The pi() function returns value of the PI:
echo(pi()); // returns value is 3.1415926535898 ?>
PHP min() and max() Functions
The min() and max() functions can be used to find the lowest or highest value in a list of arguments:
<?php echo(min(0, 150, 30, 20, -8, -200)); // returns -200 echo(max(0, 150, 30, 20, -8, -200)); // returns 150 ?>
PHP abs() Function
The abs() function returns the absolute (positive) value of a number:
<?php echo(abs(-6.7)); // returns 6.7 ?>
PHP sqrt() Function
The sqrt() function returns the square root of a number:
<?php echo(sqrt(64)); // returns 8 ?>
PHP round() Function
The round() function rounds a floating-point number to its nearest integer:
<?php echo(round(0.60)); // returns 1 echo(round(0.49)); // returns 0 ?>
Random Numbers
Generating random numbers in PHP is easy and can be done using the rand() function or the mt_rand() function.
The rand() function generates a random integer between two specified numbers, while the mt_rand() function generates a random integer within a given range using the Mersenne Twister algorithm, which is considered to be more random than rand().
Here’s an example of how to use rand() to generate a random number between 1 and 10:
$randomNumber = rand(1, 10); echo "The random number is: " . $randomNumber;
And here’s an example of how to use mt_rand() to generate a random number between 1 and 10:
$randomNumber = mt_rand(1, 10); echo "The random number is: " . $randomNumber;
You can also use these functions to generate a random number within a larger range by adjusting the parameters accordingly.
It’s worth noting that if you need to generate cryptographically secure random numbers, you should use the random_int() function instead, which uses a cryptographically secure random number generator. The syntax for random_int() is the same as rand() , but it takes two integers as arguments instead of two numbers.