str_replace(['a','b','c'],'a',$str);//a或b或c都替换成a
str_replace(['a','b','c'],['d','e','f'],$str);//a->d b->e c->f
str_replace('_', '|', 'user_order_list');//user|order|list
str_replace(['a','b','c'],'a',$str);//a或b或c都替换成a
str_replace(['a','b','c'],['d','e','f'],$str);//a->d b->e c->f
str_replace('_', '|', 'user_order_list');//user|order|list