数学
abs
<?php
var_dump(abs(-4.2));
var_dump(abs(0));
var_dump(abs(5));
acos
<?php
var_dump(acos(-1));
var_dump(acos(0));
var_dump(acos(1));
acosh
<?php
var_dump(acosh(1));
var_dump(acosh(10));
var_dump(acosh(20));
asin
<?php
var_dump(asin(-1));
var_dump(asin(0));
var_dump(asin(1));
asinh
<?php
var_dump(asinh(-1));
var_dump(asinh(0));
var_dump(asinh(1));
atan2
<?php
var_dump(atan2(-1, -1));
var_dump(atan2(1, 1));
var_dump(atan2(10, 20));
atan
<?php
var_dump(atan(-1));
var_dump(atan(0));
var_dump(atan(1));
atanh
<?php
var_dump(atanh(-0.5));
var_dump(atanh(0));
var_dump(atanh(0.5));
base_convert
<?php
var_dump(base_convert('11', 2, 10));
var_dump(base_convert('0031', 8, 10));
var_dump(base_convert('A37334', 16, 2));
bindec
<?php
var_dump(bindec('11'));
var_dump(bindec('110011'));
var_dump(bindec('111111'));
ceil
<?php
var_dump(ceil(-3.14));
var_dump(ceil(4.3));
var_dump(ceil(9.999));
cos
<?php
var_dump(cos(-1));
var_dump(cos(0));
var_dump(cos(1));
cosh
<?php
var_dump(cosh(-1));
var_dump(cosh(0));
var_dump(cosh(1));
decbin
<?php
var_dump(decbin(11));
var_dump(decbin(12));
var_dump(decbin(26));
dechex
<?php
var_dump(dechex(10));
var_dump(dechex(47));
var_dump(dechex(100));
decoct
<?php
var_dump(decoct(15));
var_dump(decoct(100));
var_dump(decoct(264));
deg2rad
<?php
var_dump(deg2rad(30));
var_dump(deg2rad(90));
var_dump(deg2rad(180));
exp
<?php
var_dump(exp(0));
var_dump(exp(5.7));
var_dump(exp(12));
expm1
<?php
var_dump(expm1(0));
var_dump(expm1(5.7));
var_dump(expm1(12));
floor
<?php
var_dump(floor(-3.14));
var_dump(floor(4.3));
var_dump(floor(9.999));
fmod
<?php
var_dump(fmod(-10, 3));
var_dump(fmod(5, 2));
var_dump(fmod(5.7, 1.3));
getrandmax
<?php
var_dump(getrandmax());
hexdec
<?php
var_dump(hexdec('a'));
var_dump(hexdec('a0'));
var_dump(hexdec('ee'));
hypot
<?php
var_dump(hypot(1, 2));
var_dump(hypot(2, 3));
var_dump(hypot(3, 4));
intdiv
<?php
var_dump(intdiv(-3, -2));
var_dump(intdiv(-3, 2));
var_dump(intdiv(3, 2));
is_finite
<?php
var_dump(is_finite(log(0)));
var_dump(is_finite(2));
var_dump(is_finite(100));
is_infinite
<?php
var_dump(is_infinite(log(0)));
var_dump(is_infinite(2));
var_dump(is_infinite(100));
is_nan
<?php
var_dump(is_nan(acos(8)));
var_dump(is_nan(0));
var_dump(is_nan(1));
lcg_value
<?php
var_dump(lcg_value());
log10
<?php
var_dump(log10(1));
var_dump(log10(2));
var_dump(log10(2.7183));
log1p
<?php
var_dump(log1p(0));
var_dump(log1p(1));
var_dump(log1p(2));
log
<?php
var_dump(log(1));
var_dump(log(1, 2));
var_dump(log(2, 2));
max
<?php
var_dump(max(1, 3, 5, 6, 7));
var_dump(max([2, 4, 5]));
var_dump(max('hello', 0));
var_dump(max(0, 'hello'));
var_dump(max('42', 3));
var_dump(max([2, 4, 8], [2, 5, 7]));
var_dump(max([2, 2, 2], [1, 1, 1, 1]));
var_dump(max('hello', [2, 5, 7], 42));
min
<?php
var_dump(min(2, 3, 1, 6, 7));
var_dump(min([2, 4, 5]));
var_dump(min('hello', 0));
var_dump(min(0, 'hello'));
var_dump(min('42', -1));
var_dump(min([2, 4, 8], [2, 5, 1]));
var_dump(min([2, 2, 2], [2, 1, 1, 1]));
var_dump(min('hello', [2, 5, 7], 42));
mt_getrandmax
<?php
var_dump(mt_getrandmax());
mt_rand
<?php
var_dump(mt_rand());
var_dump(mt_rand(5, 15));
mt_srand
<?php
mt_srand((int) (microtime(true) * 10000));
octdec
<?php
var_dump(octdec('77'));
var_dump(octdec('100'));
var_dump(octdec('777'));
pi
<?php
var_dump(pi());
pow
<?php
var_dump(pow(0, 0));
var_dump(pow(-1, 20));
var_dump(pow(2, 8));
rad2deg
<?php
var_dump(rad2deg(0.5235987755983));
var_dump(rad2deg(1.5707963267949));
var_dump(rad2deg(3.1415926535898));
rand
<?php
var_dump(rand());
var_dump(rand(5, 15));
round
<?php
var_dump(round(3.4));
var_dump(round(3.5));
var_dump(round(3.6, 0));
var_dump(round(1.95583, 2));
var_dump(round(1241757, -3));
var_dump(round(9.5, 0, PHP_ROUND_HALF_UP));
var_dump(round(9.5, 0, PHP_ROUND_HALF_DOWN));
var_dump(round(9.5, 0, PHP_ROUND_HALF_EVEN));
var_dump(round(9.5, 0, PHP_ROUND_HALF_ODD));
sin
<?php
var_dump(sin(-1));
var_dump(sin(0));
var_dump(sin(1));
sinh
<?php
var_dump(sinh(-1));
var_dump(sinh(0));
var_dump(sinh(1));
sqrt
<?php
var_dump(sqrt(8));
var_dump(sqrt(9));
var_dump(sqrt(10));
srand
<?php
srand((int) (microtime(true) * 10000));
tan
<?php
var_dump(tan(-1));
var_dump(tan(0));
var_dump(tan(1));
tanh
<?php
var_dump(tanh(-1));
var_dump(tanh(0));
var_dump(tanh(1));