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Classkit> <property_exists
[edit] Last updated: Fri, 24 May 2013

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trait_exists

(No version information available, might only be in SVN)

trait_exists检查指定的 trait 是否存在

说明

bool trait_exists ( string $traitname [, bool $autoload ] )

参数

traitname

待检查的 trait 的名称

autoload

如果尚未加载,是否使用自动加载(autoload)。

返回值

如果 trait 存在返回 TRUE,不存在则返回 FALSE。发生错误的时候返回 NULL



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