PHP Math

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Installing and configuring PHP Math Functions

Last update on September 09 2017 06:08:52 (UTC/GMT +8 hours)

In this page, we will discuss installing and configuring PHP math functions.

Requirements

PHP Math functions do not require any external library files.

Installation

Since PHP Math functions are part of the PHP core, they don't require any installation.

Runtime Configuration

You don't need to add any directive in php.ini for running PHP Math functions.

Resource Types

PHP Math functions have no defined resource types defined.

Predefined constants

In the following table, we have given a list of constants which are part of the PHP core.

Math constants

Constant

Value

Description

Availability

M_PI

3.14159265358979323846

Pi

 

M_E

2.7182818284590452354

e

 

M_LOG2E

1.4426950408889634074

log_2 e

 

M_LOG10E

0.43429448190325182765

log_10 e

 

M_LN2

0.69314718055994530942

log_e 2

 

M_LN10

2.30258509299404568402

log_e 10

 

M_PI_2

1.57079632679489661923

pi/2

 

M_PI_4

0.78539816339744830962

pi/4

 

M_1_PI

0.31830988618379067154

1/pi

 

M_2_PI

0.63661977236758134308

2/pi

 

M_SQRTPI

1.77245385090551602729

sqrt(pi)

PHP 5.2.0

M_2_SQRTPI

1.12837916709551257390

2/sqrt(pi)

 

M_SQRT2

1.41421356237309504880

sqrt(2)

 

M_SQRT3

1.73205080756887729352

sqrt(3)

PHP 5.2.0

M_SQRT1_2

0.70710678118654752440

1/sqrt(2)

 

M_LNPI

1.14472988584940017414

log_e(pi)

PHP 5.2.0

M_EULER

0.57721566490153286061

Euler constant

PHP 5.2.0

PHP_ROUND_HALF_UP

1

Round halves up

PHP 5.3.0

PHP_ROUND_HALF_DOWN

2

Round halves down

PHP 5.3.0

PHP_ROUND_HALF_EVEN

3

Round halves to even numbers

PHP 5.3.0

PHP_ROUND_HALF_ODD

4

Round halves to odd numbers

PHP 5.3.0

NAN

NAN (as a float)

Not A Number

 

INF

INF (as a float)

The infinite