# PHP36-PHP Math Functions

### PHP Math Introduction

The math functions can handle values within the range of integer and float types.### Installation

The math functions are part of the PHP core. There is no installation needed to use these functions.### PHP Math Functions

**PHP**: indicates the earliest version of PHP that supports the function.

Function | Description | PHP |
---|---|---|

abs() | Returns the absolute value of a number | 3 |

acos() | Returns the arccosine of a number | 3 |

acosh() | Returns the inverse hyperbolic cosine of a number | 4 |

asin() | Returns the arcsine of a number | 3 |

asinh() | Returns the inverse hyperbolic sine of a number | 4 |

atan() | Returns the arctangent of a number as a numeric value between -PI/2 and PI/2 radians | 3 |

atan2() | Returns the angle theta of an (x,y) point as a numeric value between -PI and PI radians | 3 |

atanh() | Returns the inverse hyperbolic tangent of a number | 4 |

base_convert() | Converts a number from one base to another | 3 |

bindec() | Converts a binary number to a decimal number | 3 |

ceil() | Returns the value of a number rounded upwards to the nearest integer | 3 |

cos() | Returns the cosine of a number | 3 |

cosh() | Returns the hyperbolic cosine of a number | 4 |

decbin() | Converts a decimal number to a binary number | 3 |

dechex() | Converts a decimal number to a hexadecimal number | 3 |

decoct() | Converts a decimal number to an octal number | 3 |

deg2rad() | Converts a degree to a radian number | 3 |

exp() | Returns the value of E^{x} |
3 |

expm1() | Returns the value of E^{x} - 1 |
4 |

floor() | Returns the value of a number rounded downwards to the nearest integer | 3 |

fmod() | Returns the remainder (modulo) of the division of the arguments | 4 |

Returns the maximum random number that can be returned by a call to the rand() function | 3 | |

hexdec() | Converts a hexadecimal number to a decimal number | 3 |

hypot() | Returns the length of the hypotenuse of a right-angle triangle | 4 |

is_finite() | Returns true if a value is a finite number | 4 |

is_infinite() | Returns true if a value is an infinite number | 4 |

is_nan() | Returns true if a value is not a number | 4 |

lcg_value() | Returns a pseudo random number in the range of (0,1) | 4 |

log() | Returns the natural logarithm (base E) of a number | 3 |

log10() | Returns the base-10 logarithm of a number | 3 |

log1p() | Returns log(1+number) | 4 |

max() | Returns the number with the highest value of two specified numbers | 3 |

min() | Returns the number with the lowest value of two specified numbers | 3 |

mt_getrandmax() | Returns the largest possible value that can be returned by mt_rand() | 3 |

mt_rand() | Returns a random integer using Mersenne Twister algorithm | 3 |

mt_srand() | Seeds the Mersenne Twister random number generator | 3 |

octdec() | Converts an octal number to a decimal number | 3 |

pi() | Returns the value of PI | 3 |

pow() | Returns the value of x to the power of y | 3 |

rad2deg() | Converts a radian number to a degree | 3 |

rand() | Returns a random integer | 3 |

round() | Rounds a number to the nearest integer | 3 |

sin() | Returns the sine of a number | 3 |

sinh() | Returns the hyperbolic sine of a number | 4 |

sqrt() | Returns the square root of a number | 3 |

srand() | Seeds the random number generator | 3 |

tan() | Returns the tangent of an angle | 3 |

tanh() | Returns the hyperbolic tangent of an angle | 4 |

### PHP Math Constants

**PHP**: indicates the earliest version of PHP that supports the constant.

Constant | Description | PHP |
---|---|---|

M_E | Returns e (approx. 2.718) | 4 |

M_EULER | Returns Euler's constant (approx. 0.577) | 4 |

M_LNPI | Returns the natural logarithm of PI (approx. 1.144) | 4 |

M_LN2 | Returns the natural logarithm of 2 (approx. 0.693) | 4 |

M_LN10 | Returns the natural logarithm of 10 (approx. 2.302) | 4 |

M_LOG2E | Returns the base-2 logarithm of E (approx. 1.442) | 4 |

M_LOG10E | Returns the base-10 logarithm of E (approx. 0.434) | 4 |

M_PI | Returns PI (approx. 3.14159) | 3 |

M_PI_2 | Returns PI/2 (approx. 1.570) | 4 |

M_PI_4 | Returns PI/4 (approx. 0.785) | 4 |

M_1_PI | Returns 1/PI (approx. 0.318) | 4 |

M_2_PI | Returns 2/PI (approx. 0.636) | 4 |

M_SQRTPI | Returns the square root of PI (approx. 1.772) | 4 |

M_2_SQRTPI | Returns 2/square root of PI (approx. 1.128) | 4 |

M_SQRT1_2 | Returns the square root of 1/2 (approx. 0.707) | 4 |

M_SQRT2 | Returns the square root of 2 (approx. 1.414) | 4 |

M_SQRT3 | Returns the square root of 3 (approx. 1.732) | 4 |

PHP36-PHP Math Functions
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