What are the mathematical functions in PHP?

PHP provides a wide range of mathematical functions, including: arithmetic operators (absolute value, round up, round down, rounding, exponentiation) trigonometric functions (sine, cosine, tangent, inverse trigonometric functions) random number functions ( Random integers, Mersenne Twister random integers, seed settings) Other functions (natural logarithms, exponents of e, square roots, remainders)

Math Functions in PHP

PHP provides a wide range of mathematical functions to handle various numerical operations. These functions can be divided into the following categories:

Arithmetic operators

• abs(): Returns the absolute value.
• ceil(): Round up.
• floor(): Round down.
• round(): Rounding.
• pow(): Find exponentiation.

Trigonometric functions

• sin(): Sine.
• cos(): Cosine.
• tan(): Tangent.
• asin(): arcsine.
• acos(): Arc cosine.
• atan(): Inverse tangent.

Random number function

• rand(): Returns a random integer.
• mt_rand(): Returns a Mersenne Twister random integer.
• srand(): Set the seed for the random number generator.

Other functions

• log(): Returns the natural logarithm.
• exp(): Returns the exponent of e.
• sqrt(): Returns the square root.
• fmod(): Returns the remainder.

Practical case

Calculate the area of ​​a circle:

$radius = 5;
$area = pi() * $radius ** 2;
echo "圆的面积：$area";

Calculate the maximum of two numbers Common divisor:

function gcd($a, $b) {
  if ($b == 0) {
    return $a;
  }
  return gcd($b, $a % $b);
}
echo gcd(15, 25);

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