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PHP 5 Math Functions



Introduction to PHP Math

The Math function can handle values in the integer and float range.


Installation

PHP Math functions are part of the core of PHP. No installation is required to use these functions.



PHP 5 Math Functions

Functions Description
abs () Returns the absolute value of a number.
acos () Returns the arc cosine of a number.
acosh () Returns the inverse hyperbolic cosine of a number.
asin () Returns the arcsine of a number.
asinh () Returns the inverse hyperbolic sine of a number.
atan () Returns the arctangent of a number.
atan2() Returns the arctangent of two variables x and y.
atanh () Returns the inverse hyperbolic tangent of a number.
base_convert () Converts numbers between arbitrary bases.
bindec () Converts a binary number to a decimal number.
ceil () Rounds up to the nearest whole number.
cos () Returns the cosine of a number.
cosh () Returns the hyperbolic cosine of a number.
decbin () Converts a decimal number to a binary number.
dechex () Converts a decimal number to a hexadecimal number.
decoct () Converts a decimal number to an octal number.
deg2rad () Converts angle values to radians.
exp () Returns the value of E x .
expm1 () Returns the value of E x _1.
floor () Rounds down to the nearest whole number.
fmod () Returns the floating_point remainder of x /y.
getrandmax() Returns the maximum possible value of a random number displayed by calling the rand () function.
hexdec () Converts a hexadecimal number to a decimal number.
hypot () Calculate the length of the hypotenuse of a right triangle.
is_finite () Determine if it is a finite value.
is_infinite () Determines whether it is infinite.
is_nan () Determine if it is non_numeric.
lcg_value () Returns a pseudo_random number in the range (0, 1).
log () Returns the natural logarithm (base E) of a number.
log10 () Returns the base_10 logarithm of a number.
log1p () return log (1 + number)
max () Returns the maximum value in an array, or the maximum value of several specified values.
min () Returns the minimum value in an array, or the minimum value of several specified values.
mt_getrandmax() Returns the maximum possible value of a random number displayed by calling the mt_rand () function.
mt_rand () Use the Mersenne Twister algorithm to generate random integers.
mt_srand () Seed Mersenne Twister random number generator.
octdec () Converts an octal number to a decimal number.
pi () Returns the value of PI.
pow () Returns x to the power of y.
rad2deg () Converts radians to angles.
rand () Returns a random integer.
round () Rounds floating point numbers.
sin () Returns the sine of a number.
sinh () Returns the hyperbolic sine of a number.
sqrt () Returns the square root of a number.
srand () Seed random number generator.
tan () Returns the tangent of a number.
tanh () Returns the hyperbolic tangent of a number.

PHP 5 predefined Math constants

Constant value Description PHP version
INF INF Infinite PHP 4
M_E 2.7182818284590452354 return e PHP 4
M_EULER 0.57721566490153286061 Returns Euler constants PHP 4
M_LNPI 1.14472988584940017414 Return the natural logarithm of PI: log_e (pi) PHP 5.2
M_LN2 0.69314718055994530942 Returns the natural logarithm of 2: log_e 2 PHP 4
M_LN10 2.30258509299404568402 Returns the natural logarithm of 10: log_e 10 PHP 4
M_LOG2E 1.4426950408889634074 Return the base-2 logarithm of E: log_2 e PHP 4
M_LOG10E 0.43429448190325182765 Return the base-10 logarithm of E: log_10 e PHP 4
M_PI 3.14159265358979323846 Return Pi PHP 4
M_PI_2 1.57079632679489661923 Back to Pi /2 PHP 4
M_PI_4 0.78539816339744830962 Return to Pi /4 PHP 4
M_1_PI 0.31830988618379067154 Return 1 /Pi PHP 4
M_2_PI 0.63661977236758134308 Return 2 /Pi PHP 4
M_SQRTPI 1.77245385090551602729 Returns the square root of PI PI: sqrt (pi) PHP 5.2
M_2_SQRTPI 1.12837916709551257390 Returns the 2 /square root of the PI PI: 2 /sqrt (pi) PHP 4
M_SQRT1_2 0.70710678118654752440 Returns the square root of 1/2: 1 /sqrt (2) PHP 4
M_SQRT2 1.41421356237309504880 Returns the square root of 2: sqrt (2) PHP 4
M_SQRT3 1.73205080756887729352 Returns the square root of 3: sqrt (3) PHP 5.2
NAN NAN Not a number PHP 4
PHP_ROUND_HALF_UP 1 Round up when encountering .5 PHP 5.3
PHP_ROUND_HALF_DOWN 2 Round down when encountering .5 PHP 5.3
PHP_ROUND_HALF_EVEN 3 Round even even when .5 is encountered PHP 5.3
PHP_ROUND_HALF_ODD 4 Round odd rounds when encountering .5 PHP 5.3