PHP 5 Math Functions

PHP 5

MATH FUNCTIONS

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PHP 5 Math Functions

PHP Math IntroductionThe math functions can handle values within the range of integer and float types.

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

PHP 5 Math FunctionsFunction Description

abs() Returns the absolute (positive) value of a number

acos() Returns the arc cosine of a number

acosh() Returns the inverse hyperbolic cosine of a number

asin() Returns the arc sine of a number

asinh() Returns the inverse hyperbolic sine of a number

atan() Returns the arc tangent of a number in radians

atan2() Returns the arc tangent of two variables x and y

atanh() Returns the inverse hyperbolic tangent of a number

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

bindec() Converts a binary number to a decimal number

ceil() Rounds a number up to the nearest integer

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 a degree value to a radian value

exp() Calculates the exponent of e

expm1() Returns exp(x) - 1

floor() Rounds a number down to the nearest integer

fmod() Returns the remainder of x/y

getrandmax() Returns the largest possible value returned by rand()

hexdec() Converts a hexadecimal number to a decimal number

hypot() Calculates the hypotenuse of a right-angle triangle

is_finite() Checks whether a value is finite or not

is_infinite() Checks whether a value is infinite or not

is_nan() Checks whether a value is 'not-a-number'

lcg_value() Returns a pseudo random number in a range between 0 and 1

log() Returns the natural logarithm of a number

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

log1p() Returns log(1+number)

max() Returns the highest value in an array, or the highest value of several specified values

min() Returns the lowest value in an array, or the lowest value of several specified values

mt_getrandmax() Returns the largest possible value returned by mt_rand()

mt_rand() Generates a random integer using Mersenne Twister algorithm

mt_srand() Seeds the Mersenne Twister random number generator

octdec() Converts an octal number to a decimal number

pi() Returns the value of PI

pow() Returns x raised to the power of y

rad2deg() Converts a radian value to a degree value

rand() Generates a random integer

round() Rounds a floating-point number

sin() Returns the sine of a number

sinh() Returns the hyperbolic sine of a number

sqrt() Returns the square root of a number

srand() Seeds the random number generator

tan() Returns the tangent of a number

tanh() Returns the hyperbolic tangent of a number

PHP 5 Predefined Math ConstantsConstant Value Description PHP Version

INF INF The infinite PHP 4

M_E 2.7182818284590452354 Returns e PHP 4

M_EULER 0.57721566490153286061 Returns Euler constant PHP 4

M_LNPI 1.14472988584940017414 Returns 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_e10

PHP 4

M_LOG2E 1.4426950408889634074 Returns the base-2 logarithm of E: log_2 e PHP 4

M_LOG10E 0.43429448190325182765 Returns the base-10 logarithm of E:log_10 e

PHP 4

M_PI 3.14159265358979323846 Returns Pi PHP 4

M_PI_2 1.57079632679489661923 Returns Pi/2 PHP 4

M_PI_4 0.78539816339744830962 Returns Pi/4 PHP 4

M_1_PI 0.31830988618379067154 Returns 1/Pi PHP 4

M_2_PI 0.63661977236758134308 Returns 2/Pi PHP 4

M_SQRTPI 1.77245385090551602729 Returns the square root of PI: sqrt(pi) PHP 5.2

M_2_SQRTPI 1.12837916709551257390 Returns 2/square root of 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 halves up PHP 5.3

PHP_ROUND_HALF_DOWN 2 Round halves down PHP 5.3

PHP_ROUND_HALF_EVEN 3 Round halves to even numbers PHP 5.3

PHP_ROUND_HALF_ODD 4 Round halves to odd numbers PHP 5.3

PHP abs() FunctionExample

Return the absolute value of different numbers:

Definition and UsageThe abs() function returns the absolute (positive) value of a number.

Syntax

abs(number);

Parameter Description

number Required. Specifies a number. If the number is of type float, the return type is also float,otherwise it is integer

Technical Details

Return Value: The absolute value of the number

Return Type: Float / Integer

PHP Version: 4+

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PHP acos() FunctionExample

Return the arc cosine of different numbers:

Definition and UsageThe acos() function returns the arc cosine of a number.

Tip: acos(-1) returns the value of Pi.

Syntax

acos(number);


number Required. Specifies a number in range -1 to 1

Technical Details

Return Value: The arc cosine of a number. Returns NAN if number is not in the range -1 to 1

Return Type: Float

PHP Version: 4+



PHP acosh() FunctionExample

Return the inverse hyperbolic cosine of different numbers:

Definition and UsageThe acosh() function returns the inverse hyperbolic cosine of a number.

Syntax

acosh(number);


number Required. Specifies a number

Technical Details

Return Value: The inverse hyperbolik cosine of number

Return Type: Float

PHP Version: 4.1+

PHP Changelog: PHP 5.3: acosh() is now available on all platform



PHP asin() FunctionExample

Return the arc sine of different numbers:

Definition and UsageThe asin() function returns the arc sine of a number.

Tip: asin(1) returns the value of Pi/2.

Syntax

asin(number);


number Required. Specifies a number in range -1 to 1

Technical Details

Return Value: The arc sine of a number. Returns NAN if number is not in the range -1 to 1

Return Type: Float

PHP Version: 4+



PHP atan() FunctionExample

Return the arc tangent of different numbers with the atan() function:

Definition and UsageThe atan() function returns the arc tangent of arg as a numeric value between -Pi/2 and Pi/2 radians.

Syntax

atan(arg);


arg Required. Specifies an argument to process

Technical Details

Return Value: The arc tangent of arg in radians

Return Type: Float

PHP Version: 4+



PHP atan2() FunctionExample

Return the arc tangent of two variables with the atan2() function:

Definition and UsageThe atan2() function returns the arc tangent of two variables x and y.

Syntax

atan2(y,x);


y Required. Specifies the dividend

x Required. Specifies the divisor

Technical Details

Return Value: The arc tangent of y/x in radians, which is between -Pi and Pi

Return Type: Float

PHP Version: 4+



PHP atanh() FunctionExample

Return the inverse hyperbolic tangent of different numbers:

Definition and UsageThe atanh() function returns the inverse hyperbolic tangent of a number.

Syntax

atanh(number);



Technical Details

Return Value: The hyperbolic tangent of number

Return Type: Float

PHP Version: 4.1+

PHP Changelog: PHP 5.3: This function is now available on all platforms



PHP base_convert() FunctionExample

Convert a hexadecimal number to octal number:

Run example

Definition and UsageThe base_convert() function converts a number from one number base to another.

Syntax

base_convert(number,frombase,tobase);


number Required. Specifies the number to convert

frombase Required. Specifies the original base of number. Has to be between 2 and 36, inclusive. Digitsin numbers with a base higher than 10 will be represented with the letters a-z, with a meaning10, b meaning 11 and z meaning 35

tobase Required. Specifies the base to convert to. Has to be between 2 and 36, inclusive. Digits innumbers with a base higher than 10 will be represented with the letters a-z, with a meaning10, b meaning 11 and z meaning 35

Technical Details

Return Value: The number converted to the specified base

Return Type: String

PHP Version: 4+

Example 1

Convert an octal number to a decimal number:



Example 2

Convert an octal number to a hexadecimal number:



PHP bindec() FunctionExample

Convert binary to decimal:

Definition and UsageThe bindec() function converts a binary number to a decimal number.

Tip: To convert decimal to binary, look at the decbin() function.

Syntax

bindec(binary_string);


binary_string Required. Specifies the binary string to convert.Note: The parameter value must be a string!

Technical Details

Return Value: The decimal value of binary_string


PHP Version: 4+



PHP ceil() FunctionExample

Round numbers up to the nearest integer:

Definition and UsageThe ceil() function rounds a number UP to the nearest integer, if necessary.

Tip: To round a number DOWN to the nearest integer, look at the floor() function.

Tip: To round a floating-point number, look at the round() function.

Syntax

ceil(number);


number Required. Specifies the value to round up

Technical Details

Return Value: The value rounded up to the nearest integer

Return Type: Float

PHP Version: 4+



PHP cos() FunctionExample

Return the cosine of different numbers:

Definition and UsageThe cos() function returns the cosine of a number.

Note: The cos() function returns a numeric value between -1 and 1, which represents the cosine of the angle.

Syntax

cos(number);



Technical Details

Return Value: The cosine of number

Return Type: Float

PHP Version: 4+



PHP cosh() FunctionExample

Return the hyperbolic cosine of different numbers:

Definition and UsageThe cosh() function returns the hyperbolic cosine of a number (equivalent to (exp(number) + exp(-number)) / 2).

Syntax

cosh(number);



Technical Details

Return Value: The hyperbolic cosine of number

Return Type: Float

PHP Version: 4.1+



PHP decbin() FunctionExample

Convert decimal to binary:

Definition and UsageThe decbin() function converts a decimal number to a binary number.

Tip: To convert binary to decimal, look at the bindec() function.

Syntax

decbin(number);


number Required. Specifies the decimal value to convert

Technical Details

Return Value: A string that contains the binary number of the decimal value

Return Type: String

PHP Version: 4+



PHP dechex() FunctionExample

Convert decimal to hexadecimal:

Definition and UsageThe dechex() function converts a decimal number to a hexadecimal number.

Tip: To convert hexadecimal to decimal, look at the hexdec() function.

Syntax

dechex(number);



Technical Details

Return Value: A string that contains the hexadecimal number of the decimal value

Return Type: String

PHP Version: 4+



PHP decoct() FunctionExample

Convert decimal to octal:

Definition and UsageThe decoct() function converts a decimal number to an octal number.

Tip: To convert octal to decimal, look at the octdec() function.

Syntax

decoct(number);



Technical Details

Return Value: A string that contains the octal number of the decimal value

Return Type: String

PHP Version: 4+



PHP deg2rad() FunctionExample

Convert degrees to radians:

Definition and UsageThe deg2rad() function converts a degree value to a radian value.

Tip: To convert a radian value to a degree value, look at the rad2deg() function.

Syntax

deg2rad(number);


number Required. Specifies the degree to convert

Technical Details

Return Value: The radian equivalent of number

Return Type: Float

PHP Version: 4+

Example 1

Convert a degree into its radian equivalent:



PHP exp() FunctionExample

Return 'e' raised to the power of different numbers:

Definition and Usage

The exp() function returns e raised to the power of x (ex).

'e' is the base of the natural system of logarithms (approximately 2.718282) and x is the number passed to it.

Syntax

exp(x);


x Required. Specifies the exponent

Technical Details

Return Value: 'e' raised to the power of x

Return Type: Float

PHP Version: 4+



PHP expm1() FunctionExample

Return exp() - 1:

Definition and UsageThe expm1() function returns exp(x) - 1.

Syntax

expm1(x);


x Required. Specifies the exponent

Technical Details

Return Value: 'e' raised to the power of x minus 1

Return Type: Float

PHP Version: 4.1+

PHP Changelog: PHP 5.3: expm1() now available on all platforms



PHP floor() FunctionExample

Round numbers down to the nearest integer:

Definition and UsageThe floor() function rounds a number DOWN to the nearest integer, if necessary.

Tip: To round a number UP to the nearest integer, look at the ceil() function.

Tip: To round a floating-point number, look at the round() function.

Syntax

floor(number);


number Required. Specifies the value to round down

Technical Details

Return Value: The value rounded down to the nearest integer

Return Type: Float

PHP Version: 4+



PHP fmod() FunctionExample

Return the remainder of x/y:

Definition and UsageThe fmod() function returns the remainder (modulo) of x/y.

Syntax

fmod(x,y);


x Required. Specifies the dividend

y Required. Specifies the divisor

Technical Details

Return Value: The floating point remainder of x/y

Return Type: Float

PHP Version: 4.2+



PHP getrandmax() FunctionExample

Return largest possible random value that can be returned by rand():

Definition and UsageThe getrandmax() function returns the largest possible value that can be returned by rand().

Syntax

getrandmax();

Technical Details

Return Value: The largest possible value returned by rand()

Return Type: Integer

PHP Version: 4+



PHP hexdec() FunctionExample

Convert hexadecimal to decimal:

Definition and UsageThe hexdec() function converts a hexadecimal number to a decimal number.

Tip: To convert decimal to hexadecimal, look at the dechex() function.

Syntax

hexdec(hex_string);


hex_string Required. Specifies the hexadecimal string to convert

Technical Details

Return Value: The decimal value of hex_string


PHP Version: 4+



PHP hypot() FunctionExample

Calculate the hypotenuse of different right-angle triangles:

Definition and UsageThe hypot() function calculates the hypotenuse of a right-angle triangle.

Tip: This function is equivalent to sqrt(x*x + y*y).

Syntax

hypot(x,y);


x Required. Specifies the length of first side

y Required. Specifies the length of second side

Technical Details

Return Value: The length of the hypotenuse

Return Type: Float

PHP Version: 4.1+



PHP is_finite() FunctionExample

Check whether a value is finite or not:

Definition and UsageThe is_finite() function checks whether a value is finite or not.

This function returns true (1) if the specified value is a finite number, otherwise it returns false/nothing.

The value is finite if it is within the allowed range for a PHP float on this platform.

Syntax

is_finite(value);


value Required. Specifies the value to check

Technical Details

Return Value: TRUE if value is a finite number, FALSE otherwise

Return Type: Boolean

PHP Version: 4.2+



PHP is_infinite() FunctionExample

Check whether a value is infinite or not:

Definition and UsageThe is_infinite() function checks whether a value is infinite or not.

This function returns true (1) if the specified value is an infinite number, otherwise it returns false/nothing.

The value is infinite if it is outside the allowed range for a PHP float on this platform.

Syntax

is_infinite(value);



Technical Details

Return Value: TRUE if value is an infinite number, FALSE otherwise


PHP Version: 4.2+



PHP is_nan() FunctionExample

Check whether a value is 'not-a-number':

Definition and UsageThe is_nan() function checks whether a value is 'not a number'.

This function returns true (1) if the specified value is 'not a number', otherwise it returns false/nothing.

Syntax

is_nan(value);



Technical Details

Return Value: TRUE if value is 'not a number', FALSE otherwise


PHP Version: 4.2+



PHP lcg_value() FunctionExample

Return a pseudo random number in a range between 0 and 1:

Definition and UsageThe lcg_value() function returns a pseudo random number in a range between 0 and 1.

Syntax

lcg_value();

Technical Details

Return Value: A pseudo random float value in a range between 0 and 1

Return Type: Float

PHP Version: 4+



PHP mt_getrandmax() FunctionExample

Return largest possible random value that can be returned by mt_rand():

Definition and UsageThe mt_getrandmax() function returns the largest possible value that can be returned by mt_rand().

Syntax

mt_getrandmax();

Technical Details

Return Value: The largest possible value returned by mt_rand()


PHP Version: 4+



PHP mt_srand() FunctionExample

Seed the random number generator:

Definition and UsageThe mt_srand() function seeds the Mersenne Twister random number generator.

Tip: From PHP 4.2.0, the random number generator is seeded automatically and there is no need to use this function.

Syntax

mt_srand(seed);


seed Optional. Specifies the seed value

Technical Details

Return Value: None

Return Type: -

PHP Version: 4+

PHP Changelog: PHP 4.2.0: Random number generator is now seeded automatically



PHP mt_rand() FunctionExample

Generate random numbers:

Definition and UsageThe mt_rand() function generates a random integer using the Mersenne Twister algorithm.

Tip: This function produces a better random value, and is 4 times faster than rand().

Tip: If you want a random integer between 10 and 100 (inclusive), use mt_rand (10,100).

Syntax

mt_rand();

or

mt_rand(min,max);


min Optional. Specifies the lowest number to be returned. Default is 0

max Optional. Specifies the highest number to be returned. Default is mt_getrandmax()

Technical Details

Return Value: A random integer between min (or 0) and max (or mt_getrandmax() inclusive). Returns FALSEif max < min


PHP Version: 4+

PHP Changelog: PHP 4.2.0: Random number generator is seeded automaticallyPHP 5.3.4: Issues an E_WARNING and returns FALSE if max < min



PHP octdec() FunctionExample

Convert octal to decimal:

Definition and UsageThe octdec() function converts an octal number to a decimal number.

Tip: To convert decimal to octal, look at the decoct() function.

Syntax

octdec(octal_string);


octal_string Required. Specifies the octal string to convert

Technical Details

Return Value: The decimal value of octal_string


PHP Version: 4+



PHP log10() FunctionExample

Return the base-10 logarithm of different numbers:

Definition and UsageThe log10() function returns the base-10 logarithm of a number.

Syntax

log10(number);


number Required. Specifies the value to calculate the logarithm for

Technical Details

Return Value: The base-10 logarithm of number

Return Type: Float

PHP Version: 4+



PHP log1p() FunctionExample

Return log(1+number) for different numbers:

Definition and UsageThe log1p() function returns log(1+number), computed in a way that is accurate even when the value of number is closeto zero.

Syntax

log1p(number);


number Required. Specifies the number to process

Technical Details

Return Value: log(1+number)

Return Type: Float

PHP Version: 4.1+

PHP Changelog: PHP 5.3: The log1p() function is now available on all platforms



PHP log() FunctionExample

Return the natural logarithm of different numbers:

PHP max() FunctionExample

Find highest value with the max() function:

Definition and UsageThe max() function returns the highest value in an array, or the highest value of several specified values.

Syntax

max(array_values);

or

max(value1,value2,...);


array_values Required. Specifies an array containing the values

value1,value2,... Required. Specifies the values to compare (must be at least two values)

Technical Details

Return Value: The numerically highest value

Return Type: Mixed

PHP Version: 4+



PHP min() FunctionExample

Find lowest value with the min() function:

Definition and UsageThe min() function returns the lowest value in an array, or the lowest value of several specified values.

Syntax

min(array_values);

or

min(value1,value2,...);


array_values Required. Specifies an array containing the values

value1,value2,... Required. Specifies the values to compare (must be at least two values)

Technical Details

Return Value: The numerically lowest value

Return Type: Mixed

PHP Version: 4+



PHP pi() FunctionExample

Return the value of PI:

Definition and UsageThe pi() function returns the value of PI.

Tip: The named constant M_PI is identical to pi().

Syntax

pi();

Technical Details

Return Value: 3.1415926535898

Return Type: Float

PHP Version: 4+



PHP pow() FunctionExample

Examples of pow():

Definition and UsageThe pow() function returns x raised to the power of y.

Syntax

pow(x,y);


x Required. Specifies the base to use

y Required. Specifies the exponent

Technical Details

Return Value: x raised to the power of y

Return Type: Integer if possible, Float otherwise

PHP Version: 4+

PHP Changelog: PHP 4.0.6: Will now return integer if possible. Earlier it only returned floatPHP 4.2.0: No warning is issued on errors



PHP rad2deg() FunctionExample

Convert radians to degrees:

Definition and UsageThe rad2deg() function converts a radian value to a degree value.

Tip: To convert a degree value to a radian value, look at the deg2rad() function.

Syntax

rad2deg(number);


number Required. Specifies a radian value to convert

Technical Details

Return Value: The equivalent of number in degrees

Return Type: Float

PHP Version: 4+



PHP rand() FunctionExample

Generate random numbers:

Definition and UsageThe rand() function generates a random integer.

Tip: If you want a random integer between 10 and 100 (inclusive), use rand (10,100).

Tip: The mt_rand() function produces a better random value, and is 4 times faster than rand().

Syntax

rand();

or

rand(min,max);


min Optional. Specifies the lowest number to be returned. Default is 0

max Optional. Specifies the highest number to be returned. Default is getrandmax()

Technical Details

Return Value: A random integer between min (or 0) and max (or getrandmax() inclusive)


PHP Version: 4+

PHP Changelog: PHP 4.2.0: Random number generator is seeded automatically



PHP round() FunctionExample

Round numbers:

Definition and UsageThe round() function rounds a floating-point number.

Tip: To round a number UP to the nearest integer, look at the ceil() function.

Tip: To round a number DOWN to the nearest integer, look at the floor() function.

Syntax

round(number,precision,mode);


number Required. Specifies the value to round

precision Optional. Specifies the number of decimal digits to round to. Default is 0

mode Optional. Specifies a constant to specify the rounding mode:

PHP_ROUND_HALF_UP - Default. Rounds number up to precision decimal, when it is halfway there. Rounds 1.5 to 2 and -1.5 to -2PHP_ROUND_HALF_DOWN - Round number down to precision decimal places, when it ishalf way there. Rounds 1.5 to 1 and -1.5 to -1PHP_ROUND_HALF_EVEN - Round number to precision decimal places towards the nexteven valuePHP_ROUND_HALF_ODD - Round number to precision decimal places towards the nextodd value

Technical Details

Return Value: The rounded value

Return Type: Float

PHP Version: 4+

PHP Changelog: PHP 5.3: The mode parameter was added

Example 1

Round numbers to two decimals:



Example 2

Round numbers using the constants:



PHP sin() FunctionExample

Return the sine of different numbers:

Definition and UsageThe sin() function returns the sine of a number.

Syntax

sin(number);


number Required. Specifies a value in radians

Technical Details

Return Value: The sine of number

Return Type: Float

PHP Version: 4+



PHP sinh() FunctionExample

Return the hyperbolic sine of different numbers:

Definition and UsageThe sinh() function returns the hyperbolic sine of a number, which is equal to (exp(number) - exp(-number))/2).

Syntax

sinh(number);



Technical Details

Return Value: The hyperbolic sine of number

Return Type: Float

PHP Version: 4.1+



PHP sqrt() FunctionExample

Return the square root of different numbers:

Definition and UsageThe sqrt() function returns the square root of a number.

Syntax

sqrt(number);



Technical Details

Return Value: The square root of number, or NAN for negative numbers

Return Type: Float

PHP Version: 4+



PHP srand() FunctionExample

Seed the random number generator:

Definition and UsageThe srand() function seeds the random number generator (rand()).

Tip: From PHP 4.2.0, the random number generator is seeded automatically and there is no need to use this function.

Syntax

srand(seed);


seed Optional. Specifies the seed value

Technical Details

Return Value: None

Return Type: -

PHP Version: 4+

PHP Changelog: PHP 4.2.0: Random number generator is now seeded automatically



PHP tan() FunctionExample

Return the tangent of different numbers:

Definition and UsageThe tan() function returns the tangent of a number.

Syntax

tan(number);


number Required. Specifies a value in radians

Technical Details

Return Value: The tangent of number

Return Type: Float

PHP Version: 4+



PHP tanh() FunctionExample

Return the hyperbolic tangent of different numbers:

Definition and UsageThe tanh() function returns the hyperbolic tangent of a number, which is equal to sinh(x)/cosh(x).

Syntax

tanh(number);



Technical Details

Return Value: The hyperbolic tangent of number

Return Type: Float

PHP Version: 4.1+





w3schools.comPHP 5 Math FunctionsPHP abs() FunctionPHP acos() FunctionPHP acosh() FunctionPHP asin() FunctionPHP atan() FunctionPHP atan2() FunctionPHP atanh() FunctionPHP base_convert() FunctionPHP bindec() FunctionPHP ceil() FunctionPHP cos() FunctionPHP cosh() FunctionPHP decbin() FunctionPHP dechex() FunctionPHP decoct() FunctionPHP deg2rad() FunctionPHP exp() FunctionPHP expm1() FunctionPHP floor() FunctionPHP fmod() FunctionPHP getrandmax() FunctionPHP hexdec() FunctionPHP hypot() FunctionPHP is_finite() FunctionPHP is_infinite() FunctionPHP is_nan() FunctionPHP lcg_value() FunctionPHP mt_getrandmax() FunctionPHP mt_srand() FunctionPHP mt_rand() FunctionPHP octdec() FunctionPHP log10() FunctionPHP log1p() FunctionPHP log() FunctionPHP max() FunctionPHP min() FunctionPHP pi() FunctionPHP pow() FunctionPHP rad2deg() FunctionPHP rand() FunctionPHP round() FunctionPHP sin() FunctionPHP sinh() FunctionPHP sqrt() FunctionPHP srand() FunctionPHP tan() FunctionPHP tanh() Function

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PHP 5 Math Functions

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