They are the new data type ROW and the user-defined functions (UDFs).
它们是新数据类型ROW和用户定义函数（UDF）。
Predicate functions are often very simple and better off being defined using a closure.
对函数使用断言通常很简单，而且最好使用闭包定义。
Functions are defined with the function keyword.
利用function关键字来定义函数。
The functions you can override are defined in the pluggable.php file in your WordPress home directory.
覆盖的函数均在WordPress主目录中的pluggable.php文件内定义。
The functions you can override are defined in the pluggable.php file in your WordPress home directory.
覆盖的函数均在WordPress主目录中的pluggable.php文件内定义。
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