print_r //打印输出数组 创建数组1 $ay=array('abc'=>'xxx','ddd'=>333,....); 创建数组2 $ay=['abc'=>'xxx','ddd'=>333,....]; //和1差不多。只不过array去掉。括号()换[] 直接赋值 $ay['abc']='xxx'; $ay['HHH']=33 引用传参==改变原有数组
