For functions and constants, if the current namespace does not contain that function or constant, PHP's fallback mechanism will fall back to the standard PHP function.
对于函数和常量,如果当前的名称空间不包含这个函数或常量,PHP的后退机制会后退到标准的php函数。
3
At the same time, there has been constant increase on the building of national key cultural infrastructures, with larger scales and better functions.