Description:
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dear,all:
   I think add a feature that "add arguments directly" will be awesome, like  
these functions "echo , require , include ". may be you can't understand my mean, 
please let me show examples below.

 echo can use like this 
         echo("string") 
 and also can call it like this syntax, 
         echo "string";
 
function "include" and "require" can support this syntax too. "require 'file'".

it is useful for Program readability  I think.

so, can you add this feature in define function for user?

Expected result:
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user_function "arg1" "arg2";

Actual result:
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user_function("arg1","arg2");