输出出现未定义变量提醒:Notice: Undefined variable: str in
输出出现未定义变量提示:Notice: Undefined variable: str in function Call(){ for($i=0;$i { $str.= $i." "; } return $str; } echo Ca...
输出出现未定义变量提示:Notice: Undefined variable: str in function Call(){ for($i=0;$i { $str.= $i." "; } return $str; } echo Ca...