PHP 5 MathFunctions
PHP Math Introduction
Math functions can handle values within the range of integer and float.
Installation
PHP Math functions are part of the PHP core. There is no installation required to use these functions.
PHP 5 Math Functions
| Function | 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 arc sine of a number. |
| asinh() | Returns the inverse hyperbolic sine of a number. |
| atan() | Returns the arc tangent of a number. |
| 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 between arbitrary bases. |
| bindec() | Converts a binary number to a decimal number. |
| ceil() | Rounds 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 an angle value to a radian value. |
| exp() | Returns Exvalue. |
| expm1() | Returns Ex- 1 value. |
| floor() | Rounds down to the nearest integer. |
| 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() | Calculates the hypotenuse length of a right triangle. |
| is_finite() | Determines whether a value is finite. |
| is_infinite() | Determines whether a value is infinite. |
| is_nan() | Determines whether a value is not a number. |
| lcg_value() | Returns a pseudo-random number in the range (0, 1). |
| log() | Returns the natural logarithm of a number (base E). |
| log10() | Returns the base-10 logarithm of a number. |
| log1p() | Returns log(1+number) |
| max() | Returns the maximum value in an array, or the maximum of several specified values. |
| min() | Returns the minimum value in an array, or the minimum of several specified values. |
| mt_getrandmax() | Returns the maximum possible value of a random number displayed by calling the mt_rand() function. |
| mt_rand() | Generates a random integer using the 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 (PI). |
| pow() | Returns x raised to the power of y. |
| rad2deg() | Converts a radian value to an angle value. |
| rand() | Returns 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 Constants
| Constant | Value | Description | PHP Version |
|---|---|---|---|
| INF | INF | Infinite | PHP 4 |
| M_E | 2.7182818284590452354 | Returns e | PHP 4 |
| M_EULER | 0.57721566490153286061 | Returns the 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_e 10 | 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 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 to even when encountering .5 | PHP 5.3 |
| PHP_ROUND_HALF_ODD | 4 | Round to odd when encountering .5 | PHP 5.3 |