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[edit] Last updated: Fri, 24 May 2013

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acosh

(PHP 4 >= 4.1.0, PHP 5)

acosh反双曲余弦

说明

float acosh ( float $arg )

返回 arg 的反双曲余弦值,即,其双曲余弦为 arg 的那个值。

参数

arg

要处理的值

返回值

The inverse hyperbolic cosine of arg

更新日志

版本 说明
5.3.0 This function is now available on all platforms

参见



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