Shouldn’t it be
$resuilt=$x-$y=20-10=10 when passed to jian like this?
威尼斯2018-08-03 11:17:54
//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);