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PHP函数参数部类

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Release: 2016-06-13 12:36:17
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PHP函数参数类型?
http://docs.php.net/manual/zh/function.array-key-exists.php

链接所示

bool array_key_exists ( mixed $key , array $search )
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bool:布尔类型
array:数组

其中,类型:mixed
是什么类型?

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