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简介 »
« GMP::__unserialize
PHP 手册
函数参考
数学扩展
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数学函数
简介
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
atan
— 反正切
atan2
— 两个参数的反正切
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($num) - 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
fpow
— Raise one number to the power of another, according to IEEE 754
hexdec
— 十六进制转换为十进制
hypot
— 计算直角三角形的斜边长度
intdiv
— 对除法结果取整
is_finite
— 判断浮点数是否是有效的有限值
is_infinite
— 判断浮点数是否为无限值
is_nan
— 判断浮点数是否是否为 NAN
log
— 自然对数
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
max
— 找出最大值
min
— 找出最小值
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
round
— 对浮点数进行四舍五入
sin
— 正弦
sinh
— 双曲正弦
sqrt
— 平方根
tan
— 正切
tanh
— 双曲正切
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