PHP Math

PHP provided its own default math features to perform mathematical operations.

These features only perform within the range of the integer and float types values.

 

Example-1

<?php
echo abs(-4.2); // 4.2 (double/float)
echo abs(5);    // 5 (integer)
echo abs(-5);   // 5 (integer)
?>

 

Output

 

Example-2

<?php
echo ceil(4.3);    // 5
echo ceil(9.999);  // 10
echo ceil(-3.14);  // -3
?>

 

Output

 

Example-3

<?php
echo rand() . "\n";
echo rand() . "\n";

echo rand(5, 15);
?>

 

Example-4

<?php

echo round(3.4);         // 3
echo round(3.5);         // 4
echo round(3.6);         // 4
echo round(3.6, 0);      // 4
echo round(1.95583, 2);  // 1.96
echo round(1241757, -3); // 1242000
echo round(5.045, 2);    // 5.05
echo round(5.055, 2);    // 5.06

?>

 

Requirements

No external libraries are needed to build this extension.

 

Installation

There is no installation needed to use these functions; they are part of the PHP core.

 

Runtime Configuration

This extension has no configuration directives defined in php.ini.

 

Resource Types

This extension has no resource types defined.

 

Predefined Constants

The constants below are always available as part of the PHP core.

 

Math Functions

• abs — Absolute value
• acos — Arc cosine
• acosh — Inverse hyperbolic cosine
• asin — Arc sine
• asinh — Inverse hyperbolic sine
• atan2 — Arc tangent of two variables
• atan — Arc tangent
• atanh — Inverse hyperbolic tangent
• base_convert — Convert a number between arbitrary bases
• bindec — Binary to decimal
• ceil — Round fractions up
• cos — Cosine
• cosh — Hyperbolic cosine
• decbin — Decimal to binary
• dechex — Decimal to hexadecimal
• decoct — Decimal to octal
• deg2rad — Converts the number in degrees to the radian equivalent
• exp — Calculates the exponent of e
• expm1 — Returns exp(number) - 1, computed in a way that is accurate even when the value of the number is close to zero
• floor — Round fractions down
• fmod — Returns the floating-point remainder (modulo) of the division of the arguments
• getrandmax — Show largest possible random value
• hexdec — Hexadecimal to decimal
• hypot — Calculate the length of the hypotenuse of a right-angle triangle
• intdiv — Integer division
• is_finite — Finds whether a value is a legal finite number
• is_infinite — Finds whether a value is infinite
• is_nan — Finds whether a value is not a number
• lcg_value — Combined linear congruential generator
• log10 — Base-10 logarithm
• log1p — Returns log(1 + number), computed in a way that is accurate even when the value of the number is close to zero
• log — Natural logarithm
• max — Find the highest value
• min — Find the lowest value
• mt_getrandmax — Show largest possible random value
• mt_rand — Generate a random value via the Mersenne Twister Random Number Generator
• mt_srand — Seeds the Mersenne Twister Random Number Generator
• octdec — Octal to decimal
• pi — Get the value of pi
• pow — Exponential expression
• rad2deg — Converts the radian number to the equivalent number in degrees
• rand — Generate a random integer
• round — Rounds a float
• sin — Sine
• sinh — Hyperbolic sine
• sqrt — Square root
• srand — Seed the random number generator
• tan — Tangent
• tanh — Hyperbolic tangent