Using Trait times PHP Parse error:syntax error, unexpected ' use ' (t_use) This bug

Find a big circle of reasons, and finally found, not the PHP version of the reason [], is to write the use of the method in the class.

This thing, can not be separated from the class used alone, otherwise, it will be considered a namespace.

Test examples are as follows

//trait.phptrait customerfunctionstrait { Public functionPlus ($a= 1,$b= 1 ) {         Echo $a+$b; }        Public functionMinus ($a= 5,$b= 1 ) {         Echo $a-$b; }   }//test.phpinclude'./trait.php ';classMyTest { Usecustomerfunctionstrait;Public function Plus () {//use customerfunctionstrait;         This is where I was wrong, writing use to the method body--!!    echo ' str '; }}$n=NewMyTest;$n->minus ();

Using Trait times PHP Parse error:syntax error, unexpected ' use ' (t_use) This bug