美帝人民爱钱嘛，如果中国人发明的语言，估计用¥开头，jQuery也是到处$

Because PHP was based on Perl which used $, though the symbols Perl used were meaningfuland plenty used to indicate the data type, ( such as @ used to indicate an array ) PHP just has $

应该是没可能去掉的，而且有了$，定义变量自由，不用考虑保留字问题了,比如$class,$function,还有变量的变量$a = 'b';$b = 'c';echo $$a;，不用担心像python定义一个list=1就把真正的list覆盖了