Summary of PHP Math API methods

WBOY
Release: 2016-07-28 08:26:34
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Current number of APIs

49

Common calculations (11)

<code><span>min</span> — 找出最小值
<span>max</span> — 找出最大值
<span>abs</span> — 绝对值

round — 对浮点数进行四舍五入
<span>ceil</span> — 返回大于或者等于指定表达式的最小整数,天花板函数
<span>floor</span> —返回小于或者等于指定表达式的最大整数,地板函数

intdiv — 对除法结果取整,返回商
<span>fmod</span> — 返回除法的浮点数余数,返回余数

is_nan — 判断是否为合法数值
<span>hypot</span> — 计算一直角三角形的斜边长度
<span>sqrt</span> — 平方根</code>
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Angle, radians (3)

<code><span>pi</span> — 得到圆周率值
deg2rad — 将角度转换为弧度
rad2deg — 将弧度数转换为相应的角度数</code>
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Base conversion (7)

<code>base_convert — 在任意进制之间转换数字
decbin — 十进制转换为二进制
bindec — 二进制转换为十进制

decoct — 十进制转换为八进制
octdec — 八进制转换为十进制

dechex — 十进制转换为十六进制
hexdec — 十六进制转换为十进制</code>
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Random numbers (7)

<code>lcg_value — 组合线性同余发生器,返回范围为 (<span>0</span>, <span>1</span>) 的一个伪随机数
<span>rand</span> — 产生一个随机整数,如果没有提供可选参数 min 和 max,<span>rand</span>() 返回 <span>0</span> 到 RAND_MAX 之间的伪随机整数。
mt_rand — 生成更好的随机整数
getrandmax — 显示随机数最大的可能值
mt_getrandmax — 显示随机数的最大可能值

<span>srand</span> — 播下随机数发生器种子,自 PHP <span>4.2</span>.<span>0</span> 起,不再需要用 <span>srand</span>() 或 mt_srand() 函数给随机数发生器播种,现在已自动完成
mt_srand — 播下一个更好的随机数发生器种子(Mersenne Twister)</code>
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Logarithms (3)

<code><span>log</span> — 自然对数
<span>log10</span> — 以 <span>10</span> 为底的对数
log1p — 返回 <span>log</span>(<span>1</span> + <span>number</span>),甚至当 <span>number</span> 的值接近零也能计算出准确结果</code>
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Exponent(3)

<code><span>exp</span> — 计算 e 的指数
expm1 — 返回 <span>exp</span>(<span>number</span>) - <span>1</span>,甚至当 <span>number</span> 的值接近零也能计算出准确结果
pow — 指数表达式</code>
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tangent sine cosine(13)

<code><span>tan</span> — 正切
<span>atan</span> — 反正切
<span>tanh</span> — 双曲正切
<span>atanh</span> — 反双曲正切
<span>atan2</span> — 两个参数的反正切

<span>sin</span> — 正弦
<span>asin</span> — 反正弦
<span>sinh</span> — 双曲正弦
<span>asinh</span> — 反双曲正弦

<span>cos</span> — 余弦
<span>acos</span> — 反余弦
<span>cosh</span> — 双曲余弦
<span>acosh</span> — 反双曲余弦</code>
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finite value, infinite value(2)

<code>is_finite — 判断是否为有限值
is_infinite — 判断是否为无限值</code>
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The above has introduced a summary of the PHP Math API methods, including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.

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