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Mathematical Functions
简介
安装/配置
需求
安装
运行时配置
资源类型
预定义常量
Math 函数
abs
— 绝对值
acos
— 反余弦
acosh
— 反双曲余弦
asin
— 反正弦
asinh
— 反双曲正弦
atan2
— 两个参数的反正切
atan
— 反正切
atanh
— 反双曲正切
base_convert
— 在任意进制之间转换数字
bindec
— 二进制转换为十进制
ceil
— 进一法取整
cos
— 余弦
cosh
— 双曲余弦
decbin
— 十进制转换为二进制
dechex
— 十进制转换为十六进制
decoct
— 十进制转换为八进制
deg2rad
— 将角度转换为弧度
exp
— 计算 e 的指数
expm1
— 返回 exp(number) - 1,甚至当 number 的值接近零也能计算出准确结果
fdiv
— Divides two numbers, according to IEEE 754
floor
— 舍去法取整
fmod
— 返回除法的浮点数余数
getrandmax
— 显示随机数最大的可能值
hexdec
— 十六进制转换为十进制
hypot
— 计算一直角三角形的斜边长度
intdiv
— 对除法结果取整
is_finite
— 判断是否为有限值
is_infinite
— 判断是否为无限值
is_nan
— 判断是否为合法数值
lcg_value
— 组合线性同余发生器
log10
— 以 10 为底的对数
log1p
— 返回 log(1 + number),甚至当 number 的值接近零也能计算出准确结果
log
— 自然对数
max
— 找出最大值
min
— 找出最小值
mt_getrandmax
— 显示随机数的最大可能值
mt_rand
— 生成更好的随机数
mt_srand
— 播下一个更好的随机数发生器种子
octdec
— 八进制转换为十进制
pi
— 得到圆周率值
pow
— 指数表达式
rad2deg
— 将弧度数转换为相应的角度数
rand
— 产生一个随机整数
round
— 对浮点数进行四舍五入
sin
— 正弦
sinh
— 双曲正弦
sqrt
— 平方根
srand
— 播下随机数发生器种子
tan
— 正切
tanh
— 双曲正切
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