关于echo woziji(20,10,'jian');

Question

Shouldn’t it be

$resuilt=$x-$y=20-10=10 when passed to jian like this?

Answer 1

//I add $one and $two, and then pass $one and $two into the function $func for processing once

//$func is a variable function, see variable function Chapter

echo $one + $two + $func($one,$two);

Answer 2

The little boss doesn’t review the questions carefully