The real parameters of a function can be more than the form parameters. what is the purpose of this function?

The real parameters of a function can be more than the form parameters. what is the purpose of this function?

Function test ($ date, $ value) {echo "$ date $ value" ;}$ date = "September 18"; $ value = "100"; $ y = "2 "; test ($ date, $ value, false );

The real parameters of a function can be more than the form parameters. what is the purpose of this function?

Reply to discussion (solution)

It is useless for your design!

It is useless for your design!

I cannot find such a case on the official website. Is there a design case?

It seems that there is no such thing

It seems that there is no such thing

I don't know what his design means?

Give a design with more parameters than the actual parameters

Function mul ($ a) {$ B = func_num_args ()> 1? Func_get_arg (1): $ a; return $ a * $ B;} echo mul (2); // 4 echo mul (2, 3); // 6