Quick reference to the math functions of PHP.
| Function | Returns | Does what |
|---|---|---|
| abs(x) | Mixed | Returns absolute value of "x" |
| ceil(x) | Float | Rounds up to next integer |
| floor(x) | Float | Rounds down to next integer |
| round(x [, precision [, mode]]) | Float | Returns "x" rounded to nearest integer |
| exp(x) | Float | Returns E to the power of "x" |
| exp1(x) | Float | Returns exp(x)-1 for close-to-zero "x" |
| fmod(x, y) | Float | Returns floating-point modulo of (x/y) |
| intdiv(x, y) | Integer | Returns integer-part of result of (x/y) |
| is_finite(x) | Boolean | Returns true if "x" is finite number |
| is_infinite(x) | Boolean | Returns true if "x" is infinite number, or larger than system Float limits |
| is_nan(x) | Boolean | Returns true if "x" is not a number |
| log(x [, base]) | Float | Returns natural logarithm, or "base" logarithm |
| log10(x) | Float | Returns base 10 logarithm of "x" |
| log1p(x) | Float | Returns log(1+x) for close-to-zero "x" |
| max(x, y [, ...]) | Mixed | Returns the highest value |
| min(x, y [, ...]) | Mixed | Returns the lowest value |
| number_format(x, decimals, dec_point, 1000sep) | String | Returns "x" formatted |
| pi() | Float | Returns value of pi (π) |
| pow(x, y) | Float | Returns "x" to the power of "y" |
| sqrt(x) | Float | Returns square root of "x" |
| Function | Returns | Does what |
|---|---|---|
| cos(x) | Float | Returns cosine of "x" in radians |
| sin(x) | Float | Returns sine of "x" in radians |
| tan(x) | Float | Returns tangent of "x" in radians |
| acos(x) | Float | Returns arc cosine of "x" in radians |
| acosh(x) | Float | Returns inverse hyperbolic cosine of "x" |
| asin(x) | Float | Returns arc sine of "x" in radians |
| asinh(x) | Float | Returns inverse hyperbolic sine of "x" |
| atan(x) | Float | Returns arc tangent of "x" in radians |
| atanh(x) | Float | Returns inverse hyperbolic tangent of "x" |
| atan2(x, y) | Float | Returns arc tangent of "x" and "y" |
| hypot(x, y) | Float | Returns hypotenuse of right-angle triangle (√(x² + y²)) |
| Function | Returns | Does what |
|---|---|---|
| base_convert(x, from_base, to_base) | String | Converts "x" from "from_base" to "to_base" |
| bindec(x) | Float | Converts "x" from binary to decimal |
| decbin(x) | String | Converts "x" from decimal to binary |
| dechex(x) | String | Converts "x" from decimal to hexadecimal |
| decoct(x) | String | Converts "x" from decimal to octal |
| deg2rad(x) | Float | Converts "x" from degrees to radians |
| hexdec(x) | Integer | Converts "x" from hexadecimal to decimal |
| octdec(x) | Integer | Converts "x" from octal to decimal |
| rad2deg(x) | Float | Converts "x" from radians to degrees |
| Function | Returns | Does what |
|---|---|---|
| rand([min , max]) | Integer | Returns pseudo random value ("min"-"max") |
| mt_rand(min, max) | Integer | Returns Mersenne Twister random value ("min"-"max") |
| lcg_value() | Float | Returns pseudo-random number between 0-1 |
| random_int(min, max) | Integer | Returns cryptographically secure pseudo-random integer |
| getrandmax() | Integer | Returns greatest rand() value |
| mt_getrandmax() | Integer | Returns greatest mt_rand() value |
| srand(integer) | Nothing | Seeds the rand() PRNG |
| mt_srand([integer]) | Nothing | Seeds the Mersenne Twister PRNG |
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