php - How to get all variables defined in the current scope/symbol table?

Is there a function and/or object and/or extension in PHP that will let you view all the variables defined in the current scope? Something like:

var_export($GLOBALS)

but only showing variables in the current symbol table.

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Best Answer-推荐答案

get_defined_vars

This function returns a multidimensional array containing a list of all defined variables, be them environment, server or user-defined variables, within the scope that get_defined_vars() is called.